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Black Box MT721A-232T - page 1
Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746 Mail order: Black Box Corporation , 1000 Park Drive, Lawrence, PA 15055-1018 Web site: www.blackbox.com • E-mail: info@blackbox.com CUSTOMER SUPPORT INFORMATION MARCH 199 ...
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Black Box MT721A-232T - page 2
FCC AND IC ST A TEMENTS 1 FEDERAL COMMUNICA TIONS COMMISSION AND INDUSTR Y CANADIA RADIO FREQUENCY INTERFERENCE ST A TEMENTS This equipment generates, uses, and can radiate radio frequency energy and if not installed and used properly, that is, in strict accordance with the manufacturer’s instructions, may cause interference to radio communicatio ...
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Black Box MT721A-232T - page 3
FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A 2 NORMAS OFICIALES MEXICANAS (NOM) ELECTRICAL SAFETY ST A TEMENT INSTRUCCIONES DE SEGURIDAD 1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de que el aparato eléctrico sea operado. 2. Las instrucciones de seguridad y operación deberán ser guardadas para referencia futu ...
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T ABLE OF CONTENTS 3 Contents Chapter Page 1. Specifications.....................................................................................................................................................4 2. Introduction ........................................................................................................................... ...
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FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A 4 Links (X.25) Characteristics Number of Links 3 Data Rate All the links aggregate up to 2.15 Mbps Interface RS-232/V .24, X.21, or V .35 (selected when you order) Connectors RS-232/V .24 25-pin D-type, female X.21 15-pin, female V .35 34-pin, female Protocol Complies with ITU X.25, LAPB (Blue Book, 198 ...
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CHAPTER 1: Specifications 5 General Indicators (9) LEDs: Power; Main links activity; Sub-channels activity; (3) Loss of synchronization; Error; Over flow; T est Operating T emperature 32 to 122°F (0 to 50°C) Humidity Up to 90%, noncondensing Power Supply V oltage 115- or 230-V AC (depending which model you ordered), 50/60 Hz Consumption 15W Fuse ...
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FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A 6 2.1 Over view The Fradswitch-8A, Fradswitch-16A, and Fradswitch-24A are combinations of a high-per formance X.25/Frame Relay P AD (Packet Assembler/Disassembler) and a Packet Switch, for concentrating and switching data in an X.25/Frame Relay environment. A Fradswitch can connect up to eight, sixteen, ...
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Black Box MT721A-232T - page 8
CHAPTER 2: Introduction 7 • Routing between several Frame Relay devices or networks (Frame Relay to Frame Relay switching). (See Figure 2-5 .) • Connection of devices supporting HDLC protocol to the X.25 or Frame Relay network. (See Figure 2-6 .) Figure 2-1. Fradswitch-8A ser ving as backbone for private X.25 data networks. STAT MUX STM LINK X. ...
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Black Box MT721A-232T - page 9
FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A 8 Figure 2-2. Fradswitch-8A pr oviding X.25 switching and async channel expansion. Figure 2-3. Fradswitch-8A ser ving as a P AD with redundant link and load sharing. One link configured as async channel. FRADSWITCH-8A STM X.25 X.25 64 Kbps COMPUTER STAT-24 (MX868A) X.25 PUBLIC NETWORK X.25 PUBLIC NETWOR ...
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CHAPTER 2: Introduction 9 Figure 2-4. (a) Fradswitch-8A operating as a switch at the user side: Conversion of Frame Relay to X.25. (b) Fradswitch-8A operating as a FRAD at the user side: Conversion of Frame Relay to async. Figure 2-5. Fradswitch-8A ser ving as a backbone for Frame Relay private data network. X.25 FRAME RELAY FRAME RELAY FRAME RELAY ...
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Black Box MT721A-232T - page 11
FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A 10 Figure 2-6. Fradswitch-8A connecting HDLC devices over X.25 or Frame Relay . 2.3 X.25 Link Features When the Fradswitch links are configured for X.25, they operate synchronously at data rates up to 2.15 Mbps. The links inter face is DTE or DCE, and the data rate is determined by the external clock ra ...
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Black Box MT721A-232T - page 12
CHAPTER 2: Introduction 11 The Fradswitch employs a unique funneling method for controlling network congestion and moderating feeder throughput speed. CCLM and LMI management protocols are supported, and operation is in compliance with ANSI T1.606, T1.619, T1.617 Annex D, and ITU Q.922, Annex A. 2.5 HDLC Link Features The Fradswitch links can be pr ...
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Black Box MT721A-232T - page 13
FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A 12 The Fradswitch supports four call-initiation methods, independently selectable for each channel. 1) Manual (regular) call initiation, whereby the user provides all the information required to set up the call by entering an X.28 command. 2) Mnemonic call initiation, whereby the user need only enter a ...
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Black Box MT721A-232T - page 14
CHAPTER 2: Introduction 13 The command facility supports the configuration of both the local and the remote channel P ADs. It includes a help function, which provides information on the available P AD commands, and on the purpose and format of each command. The Fradswitch’ s command facility can be accessed from any channel, and from any place in ...
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Black Box MT721A-232T - page 15
FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A 14 For activities that involve repetitive preparation of the same set of parameters, such as channel configuration, profiles, call IDs, etc., the Fradswitch provides a time-saving duplicate function, which allows copying an already-prepared data set as a basis for the preparation of a new set. Another v ...
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CHAPTER 2: Introduction 15 • Compression of data stored in the Fradswitch’ s nonvolatile memory , to allow maximum use of the available storage capacity . The compression is per formed by rearranging the data stored in the memor y , to close gaps between data blocks that appear naturally when the stored information is modified. • Resetting an ...
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FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A 16 T otal number of frames transmitted and received by layer 1 (the physical layer). T otal number of information frames transmitted and received by layer 2 (the link control layer). T otal number of information frames transmitted and received by layer 3 (the X.25 layer). Current X.25 synchronization st ...
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CHAPTER 2: Introduction 17 • LAPB (layer 2) statistics: T otal number of I, RR, RNR, REJ, and FRMR frames transmitted and received by layer 2. Number of transmission and reception errors. LAPB state. Current frame size. •X.25 (layer 3) statistics: T otal number of I, clear , reset, and restart packets transmitted and received by layer 3. Number ...
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Black Box MT721A-232T - page 19
FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A 18 This chapter provides mechanical and electrical installation procedures for the Fradswitch. The Fradswitch is delivered completely assembled. It’ s designed to be installed as a desktop unit or to be mounted in a 19-inch rack. After installing the unit, refer to Chapter 2 of the Packet Switching Gu ...
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Black Box MT721A-232T - page 20
CHAPTER 3: Installation 19 Ambient Requirements The ambient operating temperature of the Fradswitch should be 32 to 122°F (0 to 50°C), at a relative humidity of up to 90%, noncondensing. 3.3 Fradswitch Hardware Configuration Information 3.3.1 G ENERAL I NFORMA TION The Fradswitch contains three different types of printed circuit boards (see Figur ...
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FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A 20 Figure 3-1. Fradswitch-8A boards. 3.3.2 I NTERNAL J UMPERS W ARNING! In order to a v oid the possibility of electrical shock, alwa ys turn the power s witch off and disconnect the power cab le from mains bef ore opening the Fradswitch. The Fradswitch has two internal jumpers, designated JP1 and JP2. ...
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Black Box MT721A-232T - page 22
CHAPTER 3: Installation 21 INIT–NOR jumper , JP2 This jumper is used to select the default set of configuration parameters stored in the Fradswitch. The jumper has two positions: NOR Normal operation. The Fradswitch uses the parameters selected by the user during the last configuration session. INIT Initialization. When it is turned on, the Frads ...
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Black Box MT721A-232T - page 23
FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A 22 3.3.3 I NTERF ACE B OARD The Fradswitch is available with three types of removable inter face boards: • V .24 (RS-232) inter face for DTE and DCE. • V .35 inter face for DTE and DCE. • X.21 inter face for DTE. W ARNING! In order to a v oid the possibility of electrical shock, alwa ys turn the p ...
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Black Box MT721A-232T - page 24
CHAPTER 3: Installation 23 3.4 Installation in 19-inch Racks The Fradswitch can be installed in 19-inch racks. Unit height is 1U (1.75"). The width of the Fradswitch is slightly less than the available mounting width. An adapter kit provides the hardware necessary for installation of the Fradswitch in 19-inch racks. W ARNING! Disconnect the un ...
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Black Box MT721A-232T - page 25
FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A 24 3.5 Cable Connections The Fradswitch has three connectors located on the rear panel that ser ve the X.25 links, and RJ-45 connectors located on the front panel for the asynchronous data channels. 3.5.1 A SYNCHRONOUS D ATA -C HANNEL C ONNECTIONS Fradswitch channel inter faces are configured as data co ...
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Black Box MT721A-232T - page 26
CHAPTER 3: Installation 25 3.5.3 P OWER C ONNECTION AC power should be supplied to the Fradswitch through the 5-foot (1.5-m) power cable terminated by a standard 3-prong plug. Connect the cable between the AC mains connector on the Fradswitch’ s rear panel and a standard grounded AC outlet. W ARNING! Before s witching on this instrument, the pr o ...
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Black Box MT721A-232T - page 27
FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A 26 4.1 Controls, Indicators, and Connectors T able 4-1 lists the Fradswitch’ s front-panel indicators and connectors. The numbers under the heading “Item” refer to the identification numbers in Figure 4-1 . Figure 4-1. Fradswitch-8A fr ont-panel controls, indicators, and connectors. T able 4-1. Fr ...
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Black Box MT721A-232T - page 28
CHAPTER 4: Operation 27 T able 4-1. Fradswitch-8A controls, indicators, and connectors (continued) Item Control, Indicator , or Connector Function 4 SYNC Indicator Indicators, one for each main link, indicate Fradswitch synchronization status. Condition Indication Off Fradswitch not powered. On Fradswitch powered and synchronized with the corres- p ...
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Black Box MT721A-232T - page 29
FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A 28 T able 4-2 lists the functions of the Fradswitch’ s rear -panel controls and connectors. The numbers under the heading “Item” refer to the identification numbers in Figure 4-2 . Figure 4-2. Fradswitch-8A rear-panel contr ols and connectors. T able 4-2. Fradswitch-8A rear-panel contr ols and con ...
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Black Box MT721A-232T - page 30
CHAPTER 4: Operation 29 4.2 Operating the Fradswitch After being prepared for operation as explained in Section 4.1 , the Fradswitch normally operates unattended. Operator inter vention is required only when the Fradswitch is set up for the first time or must be adapted to new operational requirements. NOTE Fradswitc h configuration is stored in a ...
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Black Box MT721A-232T - page 31
FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A 30 This section provides concise operating instructions for the Fradswitch. Remember that the information appearing in this chapter is intended to help you start using the Fradswitch; it is not a replacement for the detailed operating instructions contained in the Packet Switching Guide . The instructio ...
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Black Box MT721A-232T - page 32
CHAPTER 5: Quick Start 31 Figure 5-1. Fradswitch-8A opening screen. Enter the password. The factory-default password is a carriage return. The Fradswitch sends the main menu of the command facility ( Figure 5-2 ). Figure 5-2. Main menu. MAIN MENU 1) CONFIGURE 2) SYSTEM CONTROL 3) DIAGNOSTICS 4) STATUS and STATISTICS 5) LOGOUT SELECT: FRADSWITCH-8A ...
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Black Box MT721A-232T - page 33
FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A 32 5.2 Basic X.25 Configuration Procedures The following text describes the configuration procedure for the basic application shown in Figure 5-3 . This configuration includes two X.25 P ADs (in this case, X.25 P AD 8 ) connected through a Fradswitch to a public X.25 network. In this form we connect a p ...
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Black Box MT721A-232T - page 34
CHAPTER 5: Quick Start 33 • Enter 1 at the “Enter link number to update:” prompt. • V erify that the X.25 transmission mode is DCE. This section assumes that your matching X.25 P AD 8 is configured as DTE. • Repeat the above procedure for link 3. • Return to the Fradswitch main menu, and select 2 (SYSTEM CONTROL). • On the Fradswitch ...
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FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A 34 • On the Fradswitch system control menu, select 9 (Reset), and enter “y” at the “Are you sure (y/n):” prompt. After doing all of the above, the routing table will be shown as in Figure 5-4 . Figure 5-4. Basic Fradswitch connection r outing table. 5.3 STM Protocol 5.3.1 STM L INKS The STM pr ...
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Black Box MT721A-232T - page 36
CHAPTER 5: Quick Start 35 9. The STM Async Channels are numbered according to the link number: For link number 1, in Stat-8, they are numbered 101—108. For link number 1, in Stat-24, they are numbered 101—124. For link number 2, in Stat-8, they are numbered 201—208. For link number 2, in Stat-24, they are numbered 201—224. • • • For l ...
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Black Box MT721A-232T - page 37
FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A 36 The “stop search” field lets you limit the address match search, so you can define more than three routing options to a given set of addresses. Furthermore, the “stop search” field allows restricting a subset of an address set to a subset of links. For example, consider the case of a Fradswit ...
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Black Box MT721A-232T - page 38
CHAPTER 5: Quick Start 37 1) Link .........11 6) Link prio .....4 2) Link .........12 7) Link prio .....5 3) Link .........0 8) Link prio .....6 4) Address ......[12XXXXXXX] 5) Stop search ..[1] S) Save CR) Exit 1) Link .........8 6) Link prio .....1 2) Link .........9 7) Link prio .....2 3) Link .........10 8) Link prio .....3 4) Address ......[12 ...
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Black Box MT721A-232T - page 39
FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A 38 5.5 Management Procedures All of the management procedures described below are started by entering a command when the channel is in the command mode. Recalling the P AD If the channel is in the command mode, you can see the P AD prompt on the monitor of your data equipment. If not, recall the P AD by ...
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Black Box MT721A-232T - page 40
CHAPTER 5: Quick Start 39 Mnemonic Call If the same destination is often used, it can be called by a mnemonic call, provided the call-initiation information has been defined by means of the Call ID function (see Chapter 2 in the Packet Switching Guide ). T o use the mnemonic call initiation command, type C, the mnemonic, and then press the <CR&g ...
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NOTES ...
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1000 P ark Drive • Lawrence, P A 15055-1018 • 724-746-5500 • F ax 724-746-0746 © Cop yright 1995. Black Box Corporation. All rights reserved. ...
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