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Manual de instrucciones AT&T 7400 series
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Summary
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AT&T 7400 series - page 1
AT&T 555-025-201 DEFINITY ® Communications System Network and Data Connectivity ...
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AT&T 7400 series - page 2
...
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CONTENTS _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ A AB BO OU UT T T TH HI IS S D DO OC CU UM ME EN NT T x xv vi ii i PREREQU ...
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iv CONTENTS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ____________________________________________________________________________________ ...
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CONTENTS v _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Internal Dial Plan 2-8 Auxiliary Call Information 2-10 Automatic Alterna ...
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vi CONTENTS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ____________________________________________________________________________________ ...
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CONTENTS vii _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Parallel vs. Serial 7-6 Transmission Speed 7-6 Type of Communications ...
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viii CONTENTS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ __________________________________________________________________________________ ...
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CONTENTS ix _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ USE OF GENERIC 2 AS A SYSTEM CLOCK REFERENCE B-29 USE OF GENERIC 1 AS A ...
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x CONTENTS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _____________________________________________________________________________________ ...
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CONTENTS xi _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Figure 6-3. Direct Link DCS Connections 6-5 Figure 6-4. Minimized Link ...
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xii CONTENTS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________ ...
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CONTENTS xiii _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Figure B-11. External and Internal Reference Levels B-19 Figure B-12. ...
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xiv CONTENTS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________ ...
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CONTENTS xv _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Table 8-8. Requirements for PBX-to-PBX Private Network Spectrum Connect ...
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xvi CONTENTS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________ ...
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ABOUT THIS DOCUMENT _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ This document explains how to arrange two or more communication ...
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xviii ABOUT THIS DOCUMENT _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ______________________________________________________________________ ...
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ABOUT THIS DOCUMENT xix _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ HOW TO MAKE COMMENTS ABOUT THIS DOCUMENT Reader comment car ...
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xx ABOUT THIS DOCUMENT _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _________________________________________________________________________ ...
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1. INTRODUCTION TO CONNECTIVITY _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ This book explains two aspects of communicating thr ...
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1-2 INTRODUCTION TO CONNECTIVITY _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _______________________________________________________________ ...
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TRANSMISSION TYPES _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Both analog and digital transmission can be used to carry inform ...
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1-4 TRANSMISSION TYPES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _________________________________________________________________________ ...
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TRANSMISSION TYPES 1-5 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ • Voice: To carry voice over digital transmission faciliti ...
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1-6 TRANSMISSION TYPES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _________________________________________________________________________ ...
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TRANSMISSION STATES _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ When you plan a communications network, there are certain rules ...
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1-8 TRANSMISSION STATES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ________________________________________________________________________ ...
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TRANSMISSION STATES 1-9 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ • Incoming digital-trunk calls to a digital switch need n ...
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1-10 TRANSMISSION STATES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _______________________________________________________________________ ...
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TRANSMISSION STATES 1-11 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ DATA TRANSMISSION Because of the variety of protocols that ...
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1-12 TRANSMISSION STATES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _______________________________________________________________________ ...
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TRANSMISSION STATES 1-13 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Protocols Used The following is a list of the protocols th ...
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1-14 TRANSMISSION STATES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _______________________________________________________________________ ...
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TRANSMISSION STATES 1-15 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Note that both the physical-layer protocol and the DMI mod ...
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1-16 TRANSMISSION STATES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _______________________________________________________________________ ...
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MULTIPLEXED COMMUNICATION _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ As signals are transmitted away from the switch and onto ...
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1-18 MULTIPLEXED COMMUNICATION _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _________________________________________________________________ ...
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MULTIPLEXED COMMUNICATION 1-19 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Line Coding Line coding is the pattern that data ass ...
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1-20 MULTIPLEXED COMMUNICATION _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _________________________________________________________________ ...
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MULTIPLEXED COMMUNICATION 1-21 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Signal Inversion Signal inversion is the replacement ...
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1-22 MULTIPLEXED COMMUNICATION _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _________________________________________________________________ ...
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MULTIPLEXED COMMUNICATION 1-23 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ TABLE 1-7: Data-Module Capabilities (Part 2 of 2) _ ...
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1-24 MULTIPLEXED COMMUNICATION _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _________________________________________________________________ ...
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MULTIPLEXED COMMUNICATION 1-25 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ The framing format does not place any requirement on ...
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1-26 MULTIPLEXED COMMUNICATION _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _________________________________________________________________ ...
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MULTIPLEXED COMMUNICATION 1-27 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Facilities using RBS carry digital data at 56 kbps. ...
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1-28 MULTIPLEXED COMMUNICATION _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _________________________________________________________________ ...
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MULTIPLEXED COMMUNICATION 1-29 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ MULTIPLEXING OUTSIDE THE SWITCH As signals propagate ...
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1-30 MULTIPLEXED COMMUNICATION _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _________________________________________________________________ ...
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MULTIPLEXED COMMUNICATION 1-31 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Compressing the Signal Through a process called adap ...
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1-32 MULTIPLEXED COMMUNICATION _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _________________________________________________________________ ...
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MULTIPLEXED COMMUNICATION 1-33 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ AT&T Microwave 0 - 56K ATT terminals T1 D4/CEM D ...
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1-34 MULTIPLEXED COMMUNICATION _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _________________________________________________________________ ...
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TRUNKING _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Trunks are the transmission medium through which voice and data signals tr ...
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1-36 TRUNKING _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ __________________________________________________________________________________ ...
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TRUNKING 1-37 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ numbers (without their accompanying location code) are sent over acce ...
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1-38 TRUNKING _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ __________________________________________________________________________________ ...
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TRUNKING 1-39 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Access can also be switched or nonswitched. • With switched access, ...
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1-40 TRUNKING _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ __________________________________________________________________________________ ...
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TRUNKING 1-41 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ DMI — A DS1 link that uses the digital multiplexed interface (DMI) ...
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1-42 TRUNKING _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ __________________________________________________________________________________ ...
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TRUNKING 1-43 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Table 1-10. Generic 1 and Generic 2 Analog Trunks — Voice/Voice-Gra ...
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1-44 TRUNKING _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ __________________________________________________________________________________ ...
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TRUNKING 1-45 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Table 1-11. Generic 1 and Generic 2 Digital Trunks — Voice BCC ...
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1-46 TRUNKING _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ __________________________________________________________________________________ ...
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TRUNKING 1-47 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ ...
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1-48 TRUNKING _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ __________________________________________________________________________________ ...
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TRUNKING 1-49 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Table 1-13. Generic 1 and Generic 2 Digital Trunks — 56 kbps User R ...
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1-50 TRUNKING _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ __________________________________________________________________________________ ...
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TRUNKING 1-51 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ ...
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1-52 TRUNKING _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ __________________________________________________________________________________ ...
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2. COMMUNICATION SYSTEM NETWORKING — AN OVERVIEW _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ A network is an interconnected g ...
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2-2 COMMUNICATION SYSTEM NETWORKING — AN OVERVIEW _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ____________________________________________ ...
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COMMUNICATION SYSTEM NETWORKING — AN OVERVIEW 2-3 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ SDN ETN LOCATION B SATELLITE MA ...
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2-4 COMMUNICATION SYSTEM NETWORKING — AN OVERVIEW _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ____________________________________________ ...
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COMMUNICATION SYSTEM NETWORKING — AN OVERVIEW 2-5 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ network calls. In addition, ARS ...
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2-6 COMMUNICATION SYSTEM NETWORKING — AN OVERVIEW _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ____________________________________________ ...
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COMMUNICATION SYSTEM NETWORKING — AN OVERVIEW 2-7 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ • The Uniform Dial Plan funct ...
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2-8 COMMUNICATION SYSTEM NETWORKING — AN OVERVIEW _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ____________________________________________ ...
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COMMUNICATION SYSTEM NETWORKING — AN OVERVIEW 2-9 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ LOCAL STATION OR NETWORK OR NET ...
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2-10 COMMUNICATION SYSTEM NETWORKING — AN OVERVIEW _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________ ...
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COMMUNICATION SYSTEM NETWORKING — AN OVERVIEW 2-11 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ • Bearer capabilities — Be ...
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2-12 COMMUNICATION SYSTEM NETWORKING — AN OVERVIEW _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________ ...
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COMMUNICATION SYSTEM NETWORKING — AN OVERVIEW 2-13 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Selecting a Trunk Group Variou ...
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2-14 COMMUNICATION SYSTEM NETWORKING — AN OVERVIEW _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________ ...
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COMMUNICATION SYSTEM NETWORKING — AN OVERVIEW 2-15 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ PARTITION GROUP NUMBER (S75/G2 ...
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2-16 COMMUNICATION SYSTEM NETWORKING — AN OVERVIEW _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________ ...
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COMMUNICATION SYSTEM NETWORKING — AN OVERVIEW 2-17 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ • When an IXC facility is ch ...
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2-18 COMMUNICATION SYSTEM NETWORKING — AN OVERVIEW _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________ ...
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COMMUNICATION SYSTEM NETWORKING — AN OVERVIEW 2-19 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Table 2-3. Networking Feature ...
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2-20 COMMUNICATION SYSTEM NETWORKING — AN OVERVIEW _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________ ...
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3. TANDEM TIE TRUNK NETWORKS _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ A tandem tie trunk (TTT) network is an network of DIME ...
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3-2 TANDEM TIE TRUNK NETWORKS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ __________________________________________________________________ ...
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4. MAIN-SATELLITE/TRIBUTARY (MS/T) NETWORKS THROUGH THE UDP OR MULTIPREMISES PACKAGES _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ____________________________________________________________________________________ ...
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4-2 MAIN-SATELLITE/TRIBUTARY (MS/T) NETWORKS THROUGH THE UDP OR MULTIPREMISES PACKAGES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _________ ...
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MAIN-SATELLITE/TRIBUTARY (MS/T) NETWORKS THROUGH THE UDP OR MULTIPREMISES PACKAGES 4-3 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ___________________________________________________________________________________ ...
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4-4 MAIN-SATELLITE/TRIBUTARY (MS/T) NETWORKS THROUGH THE UDP OR MULTIPREMISES PACKAGES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _________ ...
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MAIN-SATELLITE/TRIBUTARY (MS/T) NETWORKS THROUGH THE UDP OR MULTIPREMISES PACKAGES 4-5 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ___________________________________________________________________________________ ...
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4-6 MAIN-SATELLITE/TRIBUTARY (MS/T) NETWORKS THROUGH THE UDP OR MULTIPREMISES PACKAGES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _________ ...
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MAIN-SATELLITE/TRIBUTARY (MS/T) NETWORKS THROUGH THE UDP OR MULTIPREMISES PACKAGES 4-7 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ___________________________________________________________________________________ ...
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4-8 MAIN-SATELLITE/TRIBUTARY (MS/T) NETWORKS THROUGH THE UDP OR MULTIPREMISES PACKAGES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _________ ...
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MAIN-SATELLITE/TRIBUTARY (MS/T) NETWORKS THROUGH THE UDP OR MULTIPREMISES PACKAGES 4-9 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ___________________________________________________________________________________ ...
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4-10 MAIN-SATELLITE/TRIBUTARY (MS/T) NETWORKS THROUGH THE UDP OR MULTIPREMISES PACKAGES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ________ ...
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5. ELECTRONIC TANDEM NETWORK (ETN) THROUGH THE ETN AND PNA PACKAGES _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ An ETN is a wid ...
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5-2 ELECTRONIC TANDEM NETWORK (ETN) THROUGH THE ETN AND PNA PACKAGES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________ ...
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ELECTRONIC TANDEM NETWORK (ETN) THROUGH THE ETN AND PNA PACKAGES 5-3 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ ACCESS TIE TRU ...
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5-4 ELECTRONIC TANDEM NETWORK (ETN) THROUGH THE ETN AND PNA PACKAGES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________ ...
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ELECTRONIC TANDEM NETWORK (ETN) THROUGH THE ETN AND PNA PACKAGES 5-5 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Off-Net Trunks ...
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5-6 ELECTRONIC TANDEM NETWORK (ETN) THROUGH THE ETN AND PNA PACKAGES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________ ...
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ELECTRONIC TANDEM NETWORK (ETN) THROUGH THE ETN AND PNA PACKAGES 5-7 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Note that a Sy ...
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5-8 ELECTRONIC TANDEM NETWORK (ETN) THROUGH THE ETN AND PNA PACKAGES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________ ...
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ELECTRONIC TANDEM NETWORK (ETN) THROUGH THE ETN AND PNA PACKAGES 5-9 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Like System 85 ...
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5-10 ELECTRONIC TANDEM NETWORK (ETN) THROUGH THE ETN AND PNA PACKAGES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ __________________________ ...
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ELECTRONIC TANDEM NETWORK (ETN) THROUGH THE ETN AND PNA PACKAGES 5-11 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ SO (6) 592-34 ...
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5-12 ELECTRONIC TANDEM NETWORK (ETN) THROUGH THE ETN AND PNA PACKAGES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ __________________________ ...
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ELECTRONIC TANDEM NETWORK (ETN) THROUGH THE ETN AND PNA PACKAGES 5-13 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ CAS MAIN G1/G ...
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5-14 ELECTRONIC TANDEM NETWORK (ETN) THROUGH THE ETN AND PNA PACKAGES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ __________________________ ...
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6. DISTRIBUTED COMMUNICATIONS SYSTEM (DCS) _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ The distributed communications system (D ...
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6-2 DISTRIBUTED COMMUNICATIONS SYSTEM (DCS) _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ____________________________________________________ ...
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DISTRIBUTED COMMUNICATIONS SYSTEM (DCS) 6-3 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Tie Trunks In ETNs, the tie trunks conn ...
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6-4 DISTRIBUTED COMMUNICATIONS SYSTEM (DCS) _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ____________________________________________________ ...
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DISTRIBUTED COMMUNICATIONS SYSTEM (DCS) 6-5 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ (See chapter 9 for detailed permanent c ...
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6-6 DISTRIBUTED COMMUNICATIONS SYSTEM (DCS) _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ____________________________________________________ ...
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DISTRIBUTED COMMUNICATIONS SYSTEM (DCS) 6-7 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ A C B F G H I K L E D 1 2 3 4 1 2 3 4 1 ...
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6-8 DISTRIBUTED COMMUNICATIONS SYSTEM (DCS) _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ____________________________________________________ ...
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DISTRIBUTED COMMUNICATIONS SYSTEM (DCS) 6-9 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ RS232 MTDM MTDM DCP DCP TN764 (DIGITAL ...
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6-10 DISTRIBUTED COMMUNICATIONS SYSTEM (DCS) _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________ ...
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DISTRIBUTED COMMUNICATIONS SYSTEM (DCS) 6-11 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ TN760 (TIE TRUNK) TN722 OR TN767 (DS1) ...
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6-12 DISTRIBUTED COMMUNICATIONS SYSTEM (DCS) _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________ ...
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DISTRIBUTED COMMUNICATIONS SYSTEM (DCS) 6-13 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ *ONE OF THE 23 AVD CHANNELS IS USED FO ...
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6-14 DISTRIBUTED COMMUNICATIONS SYSTEM (DCS) _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________ ...
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DISTRIBUTED COMMUNICATIONS SYSTEM (DCS) 6-15 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Table 6-3. Availability of Attendant F ...
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6-16 DISTRIBUTED COMMUNICATIONS SYSTEM (DCS) _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________ ...
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DISTRIBUTED COMMUNICATIONS SYSTEM (DCS) 6-17 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Transparent Voice Terminal Features Th ...
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6-18 DISTRIBUTED COMMUNICATIONS SYSTEM (DCS) _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________ ...
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DISTRIBUTED COMMUNICATIONS SYSTEM (DCS) 6-19 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ feature allows the caller to leave a ? ...
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6-20 DISTRIBUTED COMMUNICATIONS SYSTEM (DCS) _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________ ...
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DISTRIBUTED COMMUNICATIONS SYSTEM (DCS) 6-21 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ • Leave Word Calling — Leave Word ...
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6-22 DISTRIBUTED COMMUNICATIONS SYSTEM (DCS) _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________ ...
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DISTRIBUTED COMMUNICATIONS SYSTEM (DCS) 6-23 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ ADMINISTRATION CONSIDERATIONS To deter ...
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6-24 DISTRIBUTED COMMUNICATIONS SYSTEM (DCS) _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________ ...
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7. DATA CONNECTIVITY — AN OVERVIEW _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ This part of the AT&T Network and Data Con ...
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7-2 DATA CONNECTIVITY — AN OVERVIEW _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ __________________________________________________________ ...
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DATA CONNECTIVITY — AN OVERVIEW 7-3 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ SYNCHRONOUS NETWORKING AT&T 6500 MULTI- F ...
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7-4 DATA CONNECTIVITY — AN OVERVIEW _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ __________________________________________________________ ...
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DATA CONNECTIVITY — AN OVERVIEW 7-5 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ 3 4 5 6 7 P SP ST 1 2 SYN SYN SOH TEXT ETX BC ...
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7-6 DATA CONNECTIVITY — AN OVERVIEW _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ __________________________________________________________ ...
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DATA CONNECTIVITY — AN OVERVIEW 7-7 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ 1 1 1 1 1 1 1 1 SERIAL 0 0 0 0 0 0 0 0 0 1 1 ...
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7-8 DATA CONNECTIVITY — AN OVERVIEW _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ __________________________________________________________ ...
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DATA CONNECTIVITY — AN OVERVIEW 7-9 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ At the point in the communications stream whe ...
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7-10 DATA CONNECTIVITY — AN OVERVIEW _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _________________________________________________________ ...
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DATA CONNECTIVITY — AN OVERVIEW 7-11 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Note that BRI terminals follow the asynchron ...
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7-12 DATA CONNECTIVITY — AN OVERVIEW _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _________________________________________________________ ...
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8. DATA COMMUNICATIONS CAPABILITIES _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Your communications system can be used to conne ...
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8-2 DATA COMMUNICATIONS CAPABILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________ ...
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DTE CONNECTIONS _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Through your communications system, you can communicate with both a ...
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8-4 DTE CONNECTIONS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ____________________________________________________________________________ ...
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DTE CONNECTIONS 8-5 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ DCE POSSIBILITIES DCEs that communicate with AT&T communica ...
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8-6 DTE CONNECTIONS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ____________________________________________________________________________ ...
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DTE CONNECTIONS 8-7 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ If you choose to use DCP (digital-line or GPP) ports for the co ...
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8-8 DTE CONNECTIONS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ____________________________________________________________________________ ...
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DTE CONNECTIONS 8-9 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ TABLE 8-1. DCP-Port Data Modules (part 2 of 2) _ ______________ ...
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8-10 DTE CONNECTIONS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________ ...
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DTE CONNECTIONS 8-11 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ RS-232D 7400A TIP-RING MODEM (HAYES AT COMPATIBLE) DCP PBX TN7 ...
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8-12 DTE CONNECTIONS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________ ...
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LOCAL AREA NETWORK CONNECTIONS _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ A local area network (LAN) is a collection of geogra ...
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8-14 LOCAL AREA NETWORK CONNECTIONS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ____________________________________________________________ ...
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LOCAL AREA NETWORK CONNECTIONS 8-15 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ — It can give outside users access to the LAN ...
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8-16 LOCAL AREA NETWORK CONNECTIONS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ____________________________________________________________ ...
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LOCAL AREA NETWORK CONNECTIONS 8-17 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ 7400A/ ADU/ MADU REMOTE PC (RPC) CLIENT (OFF PR ...
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8-18 LOCAL AREA NETWORK CONNECTIONS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ____________________________________________________________ ...
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LOCAL AREA NETWORK CONNECTIONS 8-19 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ LAN LAN D C P D S 1 S75/S85/G1/G2 D C P D S 1 S ...
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8-20 LOCAL AREA NETWORK CONNECTIONS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ____________________________________________________________ ...
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PUBLIC AND PRIVATE DATA NETWORK CONNECTIONS _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ This section describes how to use publi ...
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8-22 PUBLIC AND PRIVATE DATA NETWORK CONNECTIONS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _______________________________________________ ...
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PUBLIC AND PRIVATE DATA NETWORK CONNECTIONS 8-23 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ • Image viewing and transfer — ...
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8-24 PUBLIC AND PRIVATE DATA NETWORK CONNECTIONS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _______________________________________________ ...
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PUBLIC AND PRIVATE DATA NETWORK CONNECTIONS 8-25 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ PUBLIC SWITCHED DATA NETWORK (DOME ...
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8-26 PUBLIC AND PRIVATE DATA NETWORK CONNECTIONS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _______________________________________________ ...
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PUBLIC AND PRIVATE DATA NETWORK CONNECTIONS 8-27 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Table 8-7. Requirements for PBX-to ...
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8-28 PUBLIC AND PRIVATE DATA NETWORK CONNECTIONS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _______________________________________________ ...
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PUBLIC AND PRIVATE DATA NETWORK CONNECTIONS 8-29 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Private Terrestrial Connections Th ...
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8-30 PUBLIC AND PRIVATE DATA NETWORK CONNECTIONS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _______________________________________________ ...
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TELEMARKETING HOST CONNECTIONS _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ A telemarketing host is a processor that is used for ...
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8-32 TELEMARKETING HOST CONNECTIONS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ____________________________________________________________ ...
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TELEMARKETING HOST CONNECTIONS 8-33 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ For further details, see: • Integrated Telema ...
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8-34 TELEMARKETING HOST CONNECTIONS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ____________________________________________________________ ...
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DATA NETWORK ADMINISTRATION _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ The lines and trunks you use for data communication can ...
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8-36 DATA NETWORK ADMINISTRATION _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _______________________________________________________________ ...
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9. DATA COMMUNICATIONS CONFIGURATIONS _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Chapter 8 described how DTEs and LANs can com ...
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9-2 DATA COMMUNICATIONS CONFIGURATIONS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _________________________________________________________ ...
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DATA COMMUNICATIONS CONFIGURATIONS 9-3 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ PSC OR DSC S75/S85/G1/G2 PSC OR DSC S75/S85/ ...
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9-4 DATA COMMUNICATIONS CONFIGURATIONS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _________________________________________________________ ...
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DATA COMMUNICATIONS CONFIGURATIONS 9-5 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ SNA NODE CONNECTIONS You can use your commun ...
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9-6 DATA COMMUNICATIONS CONFIGURATIONS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _________________________________________________________ ...
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DATA COMMUNICATIONS CONFIGURATIONS 9-7 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ SWITCHED DIGITAL NETWORK PICTURETEL PICTURET ...
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9-8 DATA COMMUNICATIONS CONFIGURATIONS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _________________________________________________________ ...
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A. RELATED DOCUMENTS _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ GENERAL Operation User’s Guide — DDM-1000 (363-206-100) Z3 ...
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A-2 RELATED DOCUMENTS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ __________________________________________________________________________ ...
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RELATED DOCUMENTS A-3 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ A Guide to Premises Distribution (555-400-021) Multiple Async ...
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A-4 RELATED DOCUMENTS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ __________________________________________________________________________ ...
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RELATED DOCUMENTS A-5 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ System 75, System 85, and DIMENSION PBX Systems — Applicati ...
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A-6 RELATED DOCUMENTS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ __________________________________________________________________________ ...
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RELATED DOCUMENTS A-7 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Sales Data Switching Sales Guide (555-035-001) Data Switching ...
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A-8 RELATED DOCUMENTS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ __________________________________________________________________________ ...
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RELATED DOCUMENTS A-9 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ System 85 R2V4 to 740 Multiplexer (555-037-214) System 85 R2V ...
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A-10 RELATED DOCUMENTS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _________________________________________________________________________ ...
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B. SYNCHRONIZATION OF DIGITAL FACILITIES _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ The DS1 transmit and receive buffers (for ...
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B-2 SYNCHRONIZATION OF DIGITAL FACILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ______________________________________________________ ...
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SYNCHRONIZATION OF DIGITAL FACILITIES B-3 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Notice in figure B-1-B, Options for Sync ...
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B-4 SYNCHRONIZATION OF DIGITAL FACILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ______________________________________________________ ...
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SYNCHRONIZATION OF DIGITAL FACILITIES B-5 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ synchronized together. However, to provid ...
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B-6 SYNCHRONIZATION OF DIGITAL FACILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ______________________________________________________ ...
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SYNCHRONIZATION OF DIGITAL FACILITIES B-7 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ NOTE: For System 85 and Generic 2, the SC ...
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B-8 SYNCHRONIZATION OF DIGITAL FACILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ______________________________________________________ ...
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SYNCHRONIZATION OF DIGITAL FACILITIES B-9 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ System 85 or Generic 2 with a duplicated ...
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B-10 SYNCHRONIZATION OF DIGITAL FACILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _____________________________________________________ ...
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SYNCHRONIZATION OF DIGITAL FACILITIES B-11 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ • The LED in position #5 refers to the ...
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B-12 SYNCHRONIZATION OF DIGITAL FACILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _____________________________________________________ ...
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SYNCHRONIZATION OF DIGITAL FACILITIES B-13 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ The TN768 and TN780 circuit packs contai ...
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B-14 SYNCHRONIZATION OF DIGITAL FACILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _____________________________________________________ ...
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SYNCHRONIZATION OF DIGITAL FACILITIES B-15 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ and secondary references also apply to t ...
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B-16 SYNCHRONIZATION OF DIGITAL FACILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _____________________________________________________ ...
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SYNCHRONIZATION OF DIGITAL FACILITIES B-17 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ 2. System 85 and Generic 2 applications ...
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B-18 SYNCHRONIZATION OF DIGITAL FACILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _____________________________________________________ ...
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SYNCHRONIZATION OF DIGITAL FACILITIES B-19 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ INTERNALLY REFERENCED NODES DIGITAL TRAN ...
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B-20 SYNCHRONIZATION OF DIGITAL FACILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _____________________________________________________ ...
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SYNCHRONIZATION OF DIGITAL FACILITIES B-21 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ RULE 2: A node may use a facility as a b ...
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B-22 SYNCHRONIZATION OF DIGITAL FACILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _____________________________________________________ ...
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SYNCHRONIZATION OF DIGITAL FACILITIES B-23 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Facility rank ordering is generally base ...
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B-24 SYNCHRONIZATION OF DIGITAL FACILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _____________________________________________________ ...
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SYNCHRONIZATION OF DIGITAL FACILITIES B-25 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ B A . . . . . . . . . . . . . . . . . . ...
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B-26 SYNCHRONIZATION OF DIGITAL FACILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _____________________________________________________ ...
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SYNCHRONIZATION OF DIGITAL FACILITIES B-27 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ . . . . . . . . . . . . . . SECONDARY (B ...
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B-28 SYNCHRONIZATION OF DIGITAL FACILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _____________________________________________________ ...
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SYNCHRONIZATION OF DIGITAL FACILITIES B-29 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ CONCLUSIONS ON SYNCHRONIZATION Make no a ...
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B-30 SYNCHRONIZATION OF DIGITAL FACILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _____________________________________________________ ...
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SYNCHRONIZATION OF DIGITAL FACILITIES B-31 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Trunk-Mode Interface (ISDN-PRI + Robbed ...
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B-32 SYNCHRONIZATION OF DIGITAL FACILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _____________________________________________________ ...
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C. TRUNKING TERMS AND CAPABILITIES _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ This appendix contains a list of trunking-relate ...
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AT&T 7400 series - page 242
C-2 TRUNKING TERMS AND CAPABILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ____________________________________________________________ ...
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TRUNKING TERMS AND CAPABILITIES C-3 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ CCSA (or Common Control Switching Arrangement) ...
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AT&T 7400 series - page 244
C-4 TRUNKING TERMS AND CAPABILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ____________________________________________________________ ...
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TRUNKING TERMS AND CAPABILITIES C-5 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Derived E&M Lead Signaling A signaling inte ...
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AT&T 7400 series - page 246
C-6 TRUNKING TERMS AND CAPABILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ____________________________________________________________ ...
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TRUNKING TERMS AND CAPABILITIES C-7 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ (4) All out-of-building (inter-building) applic ...
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AT&T 7400 series - page 248
C-8 TRUNKING TERMS AND CAPABILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ____________________________________________________________ ...
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TRUNKING TERMS AND CAPABILITIES C-9 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ (3) If the other entity is a PBX, either encode ...
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AT&T 7400 series - page 250
C-10 TRUNKING TERMS AND CAPABILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________ ...
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AT&T 7400 series - page 251
TRUNKING TERMS AND CAPABILITIES C-11 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Main PBX In a main—satellite/tributary commu ...
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AT&T 7400 series - page 252
C-12 TRUNKING TERMS AND CAPABILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________ ...
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AT&T 7400 series - page 253
TRUNKING TERMS AND CAPABILITIES C-13 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Signaling Type With System 85 (R2V4) and the G ...
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AT&T 7400 series - page 254
C-14 TRUNKING TERMS AND CAPABILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________ ...
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AT&T 7400 series - page 255
TRUNKING TERMS AND CAPABILITIES C-15 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Note: Previously, most switch implementations ...
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AT&T 7400 series - page 256
C-16 TRUNKING TERMS AND CAPABILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________ ...
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AT&T 7400 series - page 257
TRUNKING TERMS AND CAPABILITIES C-17 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ TRUNKING CHARACTERISTICS TABLE D ——identi? ...
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AT&T 7400 series - page 258
C-18 TRUNKING TERMS AND CAPABILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________ ...
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AT&T 7400 series - page 259
TRUNKING TERMS AND CAPABILITIES C-19 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ____________________________________________ ...
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AT&T 7400 series - page 260
C-20 TRUNKING TERMS AND CAPABILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________ ...
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TRUNKING TERMS AND CAPABILITIES C-21 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ ______________________________________________ ...
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AT&T 7400 series - page 262
C-22 TRUNKING TERMS AND CAPABILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________ ...
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TRUNKING TERMS AND CAPABILITIES C-23 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ____________________________________________ ...
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AT&T 7400 series - page 264
C-24 TRUNKING TERMS AND CAPABILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________ ...
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AT&T 7400 series - page 265
TRUNKING TERMS AND CAPABILITIES C-25 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ____________________________________________ ...
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AT&T 7400 series - page 266
C-26 TRUNKING TERMS AND CAPABILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________ ...
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AT&T 7400 series - page 267
TRUNKING TERMS AND CAPABILITIES C-27 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ____________________________________________ ...
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C-28 TRUNKING TERMS AND CAPABILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________ ...
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AT&T 7400 series - page 269
TRUNKING TERMS AND CAPABILITIES C-29 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ____________________________________________ ...
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C-30 TRUNKING TERMS AND CAPABILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________ ...
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TRUNKING TERMS AND CAPABILITIES C-31 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ____________________________________________ ...
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C-32 TRUNKING TERMS AND CAPABILITIES _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________ ...
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D. COMMUNICATIONS PROTOCOLS _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ A protocol is a set of rules for how transmissions are ...
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D-2 COMMUNICATIONS PROTOCOLS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________ ...
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COMMUNICATIONS PROTOCOLS D-3 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ LEVEL 2 LEVEL 4 LEVEL 6 NETWORK LAYER SESSION LAYER AP ...
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D-4 COMMUNICATIONS PROTOCOLS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________ ...
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COMMUNICATIONS PROTOCOLS D-5 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Session Layer The session layer, or layer 5, provides ...
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D-6 COMMUNICATIONS PROTOCOLS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________ ...
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COMMUNICATIONS PROTOCOLS D-7 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Table D-2. Some CCITT Analog Standards _______________ ...
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D-8 COMMUNICATIONS PROTOCOLS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________ ...
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COMMUNICATIONS PROTOCOLS D-9 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Further study ( ) B Channel Packet switching CCITT-ISO ...
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D-10 COMMUNICATIONS PROTOCOLS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ __________________________________________________________________ ...
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COMMUNICATIONS PROTOCOLS D-11 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ • The Bell standard for X.25 (BX.25) The primary ra ...
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D-12 COMMUNICATIONS PROTOCOLS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ __________________________________________________________________ ...
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COMMUNICATIONS PROTOCOLS D-13 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ data frames are multiplexed into a DCP and DS1 frame. ...
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D-14 COMMUNICATIONS PROTOCOLS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ __________________________________________________________________ ...
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COMMUNICATIONS PROTOCOLS D-15 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ VARIABLE LENGTH FLAG 0 1 1 1 1 1 1 0 E SPARE SCA S DA ...
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D-16 COMMUNICATIONS PROTOCOLS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ __________________________________________________________________ ...
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COMMUNICATIONS PROTOCOLS D-17 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ The DCP protocol physical level requires a 4-wire dat ...
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D-18 COMMUNICATIONS PROTOCOLS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ __________________________________________________________________ ...
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COMMUNICATIONS PROTOCOLS D-19 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Physical Layer. This layer for BX.25 is compatible wi ...
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D-20 COMMUNICATIONS PROTOCOLS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ __________________________________________________________________ ...
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E. LEAD DEFINITIONS _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ This appendix provides tables that list the lead definitions f ...
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E-2 LEAD DEFINITIONS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________ ...
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LEAD DEFINITIONS E-3 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Table E-2. EIA RS-232D (V.28) LEADS/DEFINITIONS _ ____________ ...
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E-4 LEAD DEFINITIONS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________ ...
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LEAD DEFINITIONS E-5 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Table E-4. EIA RS-366 LEADS/DEFINITIONS ______________________ ...
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E-6 LEAD DEFINITIONS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________ ...
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LEAD DEFINITIONS E-7 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Table E-6. EIA RS-232C (V.28) LEADS SUPPORTED FOR AT&T TER ...
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E-8 LEAD DEFINITIONS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________ ...
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F. NETWORKING FEATURES——AVAILABILITY MATRIX _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ The following list compares the net ...
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F-2 NETWORKING FEATURES——AVAILABILITY MATRIX _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _______________________________________________ ...
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NETWORKING FEATURES——AVAILABILITY MATRIX F-3 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ NETWORKING FEATURES——AVAILABIL ...
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F-4 NETWORKING FEATURES——AVAILABILITY MATRIX _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _______________________________________________ ...
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NETWORKING FEATURES——AVAILABILITY MATRIX F-5 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ NETWORKING FEATURES——AVAILABIL ...
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F-6 NETWORKING FEATURES——AVAILABILITY MATRIX _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _______________________________________________ ...
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ABBREVIATIONS _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ 4ESS number 4 electronic switching system 5ESS number 5 electronic sw ...
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AB-2 ABBREVIATIONS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _____________________________________________________________________________ ...
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ABBREVIATIONS AB-3 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ ETA extended trunk access ETN electronic tandem network FAX facs ...
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AB-4 ABBREVIATIONS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _____________________________________________________________________________ ...
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ABBREVIATIONS AB-5 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ SDN Software-Defined Network SMT system management terminal SNA ...
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AB-6 ABBREVIATIONS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _____________________________________________________________________________ ...
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GLOSSARY _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ 24th-channel signaling Digital signal level-1 (DS1) signaling in which the ...
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GL-2 GLOSSARY _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ __________________________________________________________________________________ ...
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GLOSSARY GL-3 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ AUDIX Standalone An AUDIX system that has no data link and allows AUD ...
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GL-4 GLOSSARY _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ __________________________________________________________________________________ ...
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GLOSSARY GL-5 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ BRI See basic rate interface . BSC See binary synchronous communicati ...
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GL-6 GLOSSARY _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ __________________________________________________________________________________ ...
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GLOSSARY GL-7 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ CSU The terms channel service unit and customer service unit are both ...
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GL-8 GLOSSARY _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ __________________________________________________________________________________ ...
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GLOSSARY GL-9 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ DDC See Direct Department Calling . DDD See direct distance dialing . ...
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GL-10 GLOSSARY _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _________________________________________________________________________________ ...
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GLOSSARY GL-11 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ direct outward dialing (DOD) A feature that enables a communications ...
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GL-12 GLOSSARY _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _________________________________________________________________________________ ...
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GLOSSARY GL-13 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ final trunk group A last-choice trunk group that receives overflow ...
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GL-14 GLOSSARY _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _________________________________________________________________________________ ...
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GLOSSARY GL-15 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Integrated Services Digital Network (ISDN) A public or private netwo ...
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GL-16 GLOSSARY _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _________________________________________________________________________________ ...
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GLOSSARY GL-17 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ MPDM See modular processor data module . MTDM See modular trunk data ...
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GL-18 GLOSSARY _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _________________________________________________________________________________ ...
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GLOSSARY GL-19 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ permanent switched connection (PSC) On the System 75 and Generic 1, ...
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GL-20 GLOSSARY _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _________________________________________________________________________________ ...
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GLOSSARY GL-21 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ route advance A telecommunications routine that routes outgoing call ...
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GL-22 GLOSSARY _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _________________________________________________________________________________ ...
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GLOSSARY GL-23 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ tip and ring Tip and ring are common nomenclature derived from old c ...
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GL-24 GLOSSARY _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _________________________________________________________________________________ ...
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INDEX _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ 1 10-to-7 digit conversion 2-14 2 24th channel signaling 1-27 2-wire trunk C- ...
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IN-2 INDEX _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _____________________________________________________________________________________ ...
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INDEX IN-3 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ compression— Contd BCM-3200 1-31 channel expansion multiplexer 1-31 co ...
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IN-4 INDEX _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _____________________________________________________________________________________ ...
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INDEX IN-5 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ fiber-optic transmission 1-32, 8-14 file transfer 8-22, 9-6 fractional ...
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IN-6 INDEX _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _____________________________________________________________________________________ ...
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INDEX IN-7 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ network— Contd synchronization— Contd plan— Contd example B-20 iss ...
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IN-8 INDEX _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _____________________________________________________________________________________ ...
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INDEX IN-9 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ signaling— Contd address C-1 DTMF C-3 AVD 1-41 common channel signalin ...
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IN-10 INDEX _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ____________________________________________________________________________________ ...
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INDEX IN-11 _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ trunk— Contd 4-wire C-1 800 service 1-36 analog 1-9, 1-15 APLT 1-38 a ...
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IN-12 INDEX _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ ____________________________________________________________________________________ ...
Un conjunto de documentos determinado como manual de instrucciones se divide también en tipos más detallados, tales como: instrucciones de montaje AT&T 7400 series, instrucciones de servicio, instrucciones cortas o instrucciones de usuario AT&T 7400 series. Dependiendo de la situación debes buscar el documento que necesitas. En nuestra página puedes consultar el manual de instrucciones más popular del producto AT&T 7400 series.
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El manual de instrucciones, también determinado como el manual de usuario o simplemente instrucciones, es un documento técnico que tiene como objetivo ayudar a los usuarios a utilizar AT&T 7400 series. Las instrucciones normalmente las realiza un escritor técnico pero en un lenguaje comprensible para todos los usuarios de AT&T 7400 series.
El manual de instrucciones completo de AT&T debe contener unos elementos básicos. Una parte de ellos es menos importante, como por ejemplo: la portada / la página principal o las páginas de autor. Sin embargo, lo demás debe facilitarnos la información más importante desde el punto de vista del usuario.
1. Introducción y pistas sobre cómo orientarse con el manual AT&T 7400 series - Al principio de cada manual se deben encontrar las indicaciones acerca de la manera de usar un manual de instrucciones. Debe contener información sobre dónde encontrar el índice AT&T 7400 series, preguntas frecuentes o problemas más comunes – son los apartados más buscados por los usuarios de cada manual de instrucciones.
2. Índice - listados de todos los consejos acerca de AT&T 7400 series que encontraremos en el documento
3. Consejos de uso de las funciones básicas del dispositivo AT&T 7400 series - que deben facilitarnos los primeros pasos durante el uso de AT&T 7400 series
4. Troubleshooting - una secuencia sistematizada de acciones que nos ayudará a diagnosticar los problemas más importantes con AT&T 7400 series
5. FAQ - las preguntas frecuentes
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