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Manual Ericsson W20

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  • Ericsson W20 - page 1

    Ericsson W20 Fixed Wireless Terminal for WCDMA/HSDPA Mobile Networks User's Guide ...

  • Ericsson W20 - page 2

    Ericsson W20 Fixed Wireless Terminal for WCDMA/HSDPA Mobile Networks User's Guide . ii 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 Copyright © Ericsson Enterprise AB 2006 - All Rights Reserved Disclaimer No part of this document may be reproduced in any form without the written permission of the copyright owner. The contents of this document are ...

  • Ericsson W20 - page 3

    . 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 iii Contents 1 Introduction 1 1.1 Structure of this Guide 1 1.2 Product Overview 1 1.2.1 Indicators and Connectors 2 2 Configuration and Management 5 2.1 Accessing Internal Web Pages 5 2.2 Overview Page 6 2.2.1 Changing Password 6 2.2.2 Alarms 7 2.2.3 Network Information 8 2.3 Configuration Wizard 9 2.3.1 ...

  • Ericsson W20 - page 4

    Contents iv 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 2.7.2 Application Level Gateways 33 2.7.3 Port Forwarding 33 2.8 File Sharing 35 2.9 System 37 2.9.1 Configuration Backup and Restore 38 2.9.2 Restart 38 2.9.3 Software Update 39 2.10 Event Log 41 3 PC Configuration 42 3.1 IP Settings 42 3.1.1 Obtaining IP Settings Automatically 42 3.1.2 Configur ...

  • Ericsson W20 - page 5

    Introduction 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 1 1 Introduction This chapter describes the structure of this guide and gives a brief product overview. 1.1 S tructure of this Guide This User’s Guide contains information that is needed to configure and manage the Ericsson W20 Fixed Wireless Terminal (FWT). The following chapters are included ...

  • Ericsson W20 - page 6

    Introduction 2 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 • File Sharing Network storage is supported through USB connection of up to two mass storage devices at the same time. • Local Wireless Access with High-level Security The Ericsson W20 is a WLAN access point for the wireless local network including WEP, WPA, and WPA2 with pre-shared keys f ...

  • Ericsson W20 - page 7

    Introduction 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 3 T able 1 Front Panel Indicators Text Status Description Power Green Unlit Power is on. Power is off. Mobile Network Green Yellow Flashing Unlit The UMTS network is available. The GSM network is available. Searching for a connection. No connection to the mobile network. Internet Green Unlit Con ...

  • Ericsson W20 - page 8

    Introduction 4 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 A description of each connector is provided in the table below (from left to right): T able 2 Connectors Label Description 10-28 VDC Power input for connecting the power supply adapter. Reset Button used to restore the Ericsson W20 configur ation to factory default settings. The following proc ...

  • Ericsson W20 - page 9

    Configuration and Management 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 5 2 Configuration and Management Follow the instructions in the Quick Installation Guide to install the Ericsson W20. When the installation is finished, t he Ericsson W20 internal web pages are available for configuration and status control. This chapter provides detailed informa ...

  • Ericsson W20 - page 10

    Configuration and Management 6 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 Figure 4 Overview page The left-hand menu includes configuration topics described one by one in the following sections. Apart from the links menu to the left, each web page includes a Logout link to make it possible to log out whenever it is desired. 2.2 Overview Page The Overv ...

  • Ericsson W20 - page 11

    Configuration and Management 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 7 Figure 5 Change Password page 2. Type the old password in the Current Password field. If it is the first time you change password, the old password is user . 3. Type the new password in the New Password and Retype New Password fields. Note: The password is case-sensitive (dist ...

  • Ericsson W20 - page 12

    Configuration and Management 8 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 SIM card permanently blocked The SIM card cannot be unblocked. A new SIM card is required. Alarm detection not working The Ericsson W20 alarm detection function is not working. Unknown alarm The Ericsson W20 cannot identify the alarm. For information about how to react on an al ...

  • Ericsson W20 - page 13

    Configuration and Management 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 9 2.3 Configuration Wizard The Configuration Wizard guides you step by step through the basic setup of the mobile network connection and optionally for the wireless LAN access point. Click Configuration Wizard… on the Overview page to start the wizard. The first page of the wiz ...

  • Ericsson W20 - page 14

    Configuration and Management 10 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 Type the PIN in the PIN field on the first page of the Configuration Wizard, see Figure 6. Thereafter, you can select the Remember my PIN check box. This makes SIM authentication automatic and you will not have to enter the PIN in case of a system restart. Click Next to procee ...

  • Ericsson W20 - page 15

    Configuration and Management 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 11 Figure 8 Internet Access: APN page Type the APN(s) in the APN (2G) and APN (3G) fields on the Internet Access: APN page. Click Next to proceed. PPP User Authentication The PPP (Point-to-Point Protocol) Internet mode may require individual user authentication. Figure 9 Internet ...

  • Ericsson W20 - page 16

    Configuration and Management 12 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 2.3.2 Wireless LAN Access The second part of the Configuration Wizard includes configuration of the Wireless LAN (WLAN). A Wireless LAN is a local network that communicates through wireless connections. Note: The wireless setup typically requires configuration of both the Eric ...

  • Ericsson W20 - page 17

    Configuration and Management 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 13 Figure 11 Confirm page Check the information on this page and click Finish to confirm the settings. Region To make sure the Ericsson W20 operates on correct radio frequencies according to local regulations, you have to state in which region you reside. After this you cannot se ...

  • Ericsson W20 - page 18

    Configuration and Management 14 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 Channel Selection The maximum number of regulatory channels to use for wireless communication is 13. Available channels depend on local regulations. Yo u can select one of the available channels yourself, or let the Ericsson W20 automatically select a channel. Figure 13 Wirele ...

  • Ericsson W20 - page 19

    Configuration and Management 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 15 Figure 14 Wireless LAN: Network Name (SSID) page The default network name can be changed to any combination of numbers (0 – 9), letters (a – z), and hyphens (-) with a maximum length of 127 characters. Type the new name in the Network name (SSID) field on the Wireless LAN: ...

  • Ericsson W20 - page 20

    Configuration and Management 16 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 Figure 15 Wireless LAN: Authentication page Note: Make sure that the operating system(s) and wireless LAN interface(s) of the wireless client(s) support the selected authentication method. Select one of the authentication methods from the Authentication list on the Wireless LA ...

  • Ericsson W20 - page 21

    Configuration and Management 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 17 If you select WEP (64 bit) , the Wireless LAN: WEP (64 BIT) page is displayed: Figure 17 Wireless LAN: WEP (64 BIT) page If you select WEP (128 bit) , the Wireless LAN: WEP (128 BIT) page is displayed: Figure 18 Wireless LAN: WEP (128 BIT) page ...

  • Ericsson W20 - page 22

    Configuration and Management 18 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 If you select WPA , the Wireless LAN: WPA page is displayed: Figure 19 Wireless LAN: WPA page If you select WPA2 , the Wireless LAN: WPA2 is displayed: Figure 20 Wireless LAN: WPA2 page WEP Encryption Key The WEP encrypted data can only be sent and received by users with acces ...

  • Ericsson W20 - page 23

    Configuration and Management 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 19 A 64-bit data encryption key includes 10 characters. A 128-bit data encryption key includes 26 characters. Only the hexadecimal numbers 0 to 9 and letters A to F are allowed. Fill in the Encryption key field on the Wireless LAN: WEP (64 BIT) page or the Wireless LAN: WEP (128 ...

  • Ericsson W20 - page 24

    Configuration and Management 20 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 2.4 Internet The Ericsson W20 connects to the Internet through mobile (radio) communication using the UMTS (3G) network. If the UMTS network is not available, the GSM (2G) network is used as fall-back. Connection details are displayed on the Internet page: Figure 22 Internet p ...

  • Ericsson W20 - page 25

    Configuration and Management 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 21 Link Status The Internet access status, either Up or Down If the link is up, connection is established. Mode The protocol used for the Internet data traffic: PPP (Point-to-Point Protocol) Connection The radio access technique currently used to enable Internet access. It can be ...

  • Ericsson W20 - page 26

    Configuration and Management 22 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 Note: The data size and packet counters have the upper limits of 4 GiB and 2 32 packets (more than 4 billion packets). When these limits have been reached, the counters wrap around to zero. 2.4.2 Authentication Internet access requires authentication of the Ericsson W20. Depen ...

  • Ericsson W20 - page 27

    Configuration and Management 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 23 Unblocking SIM Card If three attempts have been made with the wrong PIN, the SIM card is blocked. The PUK is required to unblock the card. Click the Unblock SIM link that will be displayed beside the PIN field. The Unblock SIM page is displayed: Figure 23 Unblock SIM page Type ...

  • Ericsson W20 - page 28

    Configuration and Management 24 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 Type the current and new PIN in the corresponding fields and click OK . If you want to change the APN, PPP us er name, or PPP password, type the new value in the corresponding field on the Internet page and click Apply . 2.5 LAN The LAN (Local Area Network) configuration inclu ...

  • Ericsson W20 - page 29

    Configuration and Management 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 25 The following information and configuration options are displayed on top of the LAN page: W20 IP address The LAN address of the Ericsson W20. Subnet mask The subnet mask, which determines the range of IP addresses on the subnet. If you want to change the W20 IP address, make s ...

  • Ericsson W20 - page 30

    Configuration and Management 26 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 IP address range to The last IP address in a range of IP addresses that can be assigned to the LAN clients. Max Lease Time [sec] The IP address lease time, specified in seconds: min: 60 max: 2147483647 To disable the DHCP server, clear the Enable DHCP server check box. If you ...

  • Ericsson W20 - page 31

    Configuration and Management 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 27 2.5.3 Port St atus The Port Status table shows the connection(s) to the LAN ( 1 - 4 ) ports on the Ericsson W20 unit. The status for each port is Up or Down . 2.6 Wireless LAN A Wireless LAN (WLAN) is a local network that communicates through wireless connections. The Ericsson ...

  • Ericsson W20 - page 32

    Configuration and Management 28 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 2.6.1 Radio Channels There are 13 regulatory radio channels predefined for the transportation of data in a wireless LAN. Local regulations determine which of these channels that can be used by the Ericsson W20. The following settings concerning radio frequencies are displayed ...

  • Ericsson W20 - page 33

    Configuration and Management 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 29 When the scanning is finished, the following information about identified wireless networks is displayed: MAC Address The MAC address of the access point of the wireless network. Network Name The name of the wireless network. Channel The radio channel used by the wireless netw ...

  • Ericsson W20 - page 34

    Configuration and Management 30 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 To disable network name broadcasting, clear the Enable SSID broadcast check box on the Wireless LAN page. Click Apply to save the settings. 2.6.3 Security The wireless data transmissions can be protected from potential intruders and eavesdroppers through standard authenticatio ...

  • Ericsson W20 - page 35

    Configuration and Management 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 31 Authentication The authentication method, which can be one of the following: Open WEP (64 bit) WEP (128 bit) WPA WPA2 Passphrase / Key The WEP 64-bit data encryption or 128-bit data encryption key or the WPA or WPA2 authentication and encryption pass phrase. Enable whitelist I ...

  • Ericsson W20 - page 36

    Configuration and Management 32 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 2.6.5 Whitelist The Whitelist is a list of up to 20 WLAN client MAC (Media Access Control) addresses that are allowed to access the Ericsson W20. A MAC address is the unique hardware number of a device. It has the form of xx:xx:xx:xx:xx:xx, where x is either a letter A – F o ...

  • Ericsson W20 - page 37

    Configuration and Management 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 33 port forwarding allowing communication between certain Internet applications and the local network. When UPnP IGD is enabled, programs like MSN Messenger ® and most network enabled games are allowed to pass the NAT service. To disable UPnP IGD, clear the Enable UPnP IGD check ...

  • Ericsson W20 - page 38

    Configuration and Management 34 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 Adding an Instance To add a new port forwarding instance, click Add instance in the Port Forwarding section on the NAT page. The Add Portforwarding Instance page is displayed: Figure 29 Add Portforwarding Instance page Fill in the Protocol , NAT Port , Server IP , and Server P ...

  • Ericsson W20 - page 39

    Configuration and Management 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 35 Server Port The destination port, which identifies the type of service that is directed, for example web service on port 8080. Prot The data traffic protocol; UDP or TCP . Editing an Instance To edit a port forwarding instance, click the corresponding Edit link in the Port For ...

  • Ericsson W20 - page 40

    Configuration and Management 36 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 Note: If the mass storage device contains more than one partition, only the first partition is shared. To access a shared file from a PC on your LAN, you may need the following information, displayed on the File Sharing page. Host name The name of the Ericsson W20 on the local ...

  • Ericsson W20 - page 41

    Configuration and Management 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 37 2.9 System The System page includes system information and management functions, used to update and restore the Ericsson W20. Figure 31 System page ...

  • Ericsson W20 - page 42

    Configuration and Management 38 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 2.9.1 Configuration Backup and Restore The Ericsson W20 configuration can be restored to factory default settin gs, or to any previous configuration locally stored in a backup file. Backing Up a Configuration It is possible to back up a configuration that you want to save for ...

  • Ericsson W20 - page 43

    Configuration and Management 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 39 2.9.3 Sof tware Up date New Ericsson W20 software versions can be either automatically or manually installed. Automatic Software Installation Automatic software update is supported through remote management. Your service provider regularly updates the Ericsson W20 with the mos ...

  • Ericsson W20 - page 44

    Configuration and Management 40 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 Figure 33 Software Update initiated page The information on this page is updated every tenth second. When the upgrade is finished, the following page is displayed: Figure 34 Software Update complete page Click Restart to restart the Ericsson W20. To install new software from a ...

  • Ericsson W20 - page 45

    Configuration and Management 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 41 2.10 Event Log On the Event Log page, a list of the Ericsson W20 logs i s displayed: Figure 35 Event Log page Each row in the log list displays the time and date when an alarm occurred, the type of alarm, and a brief statement indicating its cause. If persistent logging is ena ...

  • Ericsson W20 - page 46

    PC Configuration 42 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 3 PC Configuration The connection to the Ericsson W20 may require specific PC configuration. This chapter includes instructions on how to configure Internet Protocol (IP) settings, establish wireless connectio n(s) with the Ericsson W20 and access a shared network storage device. The desc ...

  • Ericsson W20 - page 47

    PC Configuration 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 43 4 Select Internet Protocol TCP/IP and ensure that the check box beside the text is selected. Click Properties . 5 In the Internet Protocol (TCP/IP) Properties window, select Obtain an IP address automatically and Obtain DNS server address automatically . 6 Click OK twice to confirm your c ...

  • Ericsson W20 - page 48

    PC Configuration 44 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 11. Select Internet Protocol TCP/IP an d ensure that the check box beside the text is selected. Click Properties . 12. In the Internet Protocol (TCP/IP) Properties dialog box, click the Obtain an IP address automatically option button. Also click the Obtain DNS server address automaticall ...

  • Ericsson W20 - page 49

    PC Configuration 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 45 files and instructions on how to install them are provided together with the interface. 3.2.3 Configuring PC A ccess to the Ericsson W20 The configuration steps below will vary depending on both the operating system and the wireless LAN interface installed on the PC. These steps provide a ...

  • Ericsson W20 - page 50

    PC Configuration 46 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 3.3.1 Accessing a Shared Device To access a shared device from a PC using Windows 2000 or XP, follow the steps below: 1. In the Windows task bar, click the Start button, and then click Run… . 2. Type <host name><share Name> in the Open field. The Host name and Share name ...

  • Ericsson W20 - page 51

    PC Configuration 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 47 Windows 2000 Follow the steps below to check the workgroup settings on a PC using Windows 2000: 1. In the Windows task bar, click the Start button, and then click Settings and Control Panel . The Control Panel window is displayed. 2. Double-click the System icon. The System Properties win ...

  • Ericsson W20 - page 52

    PC Configuration 48 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 5. Click Finish . The Map Netw ork Drive window is closed. The device is displayed in the My Computer window as a new partition. Windows 2000 Follow the steps below to configure a connection to a shared storage device from a PC using Windows 2000: 1. Right-click the My Computer icon and s ...

  • Ericsson W20 - page 53

    Trouble-Shooting 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 49 4 Trouble-Shooting This chapter describes how to solve a number of issues that could occur during installation, configuration, and use of the Ericsson W20. More information is available at www.ericsson.com/fwt . Before you try any of the methods described in this chapter, make sure that t ...

  • Ericsson W20 - page 54

    Trouble-Shooting 50 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 4.1 No Access to Ericsson W20 W eb Pages If you cannot access the Ericsson W20 internal web pages, take the following actions to identify and solve the problem: • Check that the PC is configured to obtain an IP address aut omatically using DHCP. If not, change the PC TCP/IP settings. Fo ...

  • Ericsson W20 - page 55

    Trouble-Shooting 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 51 • On the Internet page, check that the PIN field is filled in and that there is no error message beside this field. If there is a message saying Insert SIM , verify that a valid SIM card is correctly inserted and then retype the PIN code on the Internet page. If the message says Set PIN ...

  • Ericsson W20 - page 56

    Trouble-Shooting 52 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 4.5 No LAN Connection If you cannot access the local network from a PC that is connected to one of the LAN ports on the Ericsson W20, or to an Ethernet switch or hub that is connected to the Ericsson W20, take the following actions to identify and solve the problem: • Check that the cor ...

  • Ericsson W20 - page 57

    Trouble-Shooting 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 53 • Verify that the network name (SSID) on the Ericsson W20 and the wireless client are the same. Note that the network name is case sensitive. • If you are using WEP, make sure that the encryption key length (64-bit or 128-bit) is the same on the Ericsson W20 and the wireless client. ? ...

  • Ericsson W20 - page 58

    Trouble-Shooting 54 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 automatically ( Auto ) or manually change the radio channel currently used. • Keep the Ericsson W20 away from electrical devices that disturb the radio frequency signals, for example microwave ovens. • Check that the Transmit power [dBm] on the Wireless LAN page is configured in accor ...

  • Ericsson W20 - page 59

    Glossary 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 55 Glossary 2G The second generation wireless communications technology, introducing digital voice encoding. Low speed data services are supported. 3G The third-generation wireless communications technology. 3G includes enhanced voice, data, and video capabilities, improved availability, broad bandw ...

  • Ericsson W20 - page 60

    Glossary 56 561/1551-CRH 102 167 Uen Rev A 2006-09-07 EDGE Enhanced Data rates for Global Evolution. A technology that gives GSM the capacity to handle services for the third generation of mobile telephony. EDGE provides three times the data capacity of GPRS. Encryption The translation of data into a form that cannot be easily understood by unautho ...

  • Ericsson W20 - page 61

    Glossary 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 57 IP address The address of a host on the Internet, consisting of four numbers, each from 0 to 255, separated by periods, for example 192.168.1.1. An IP address consists of a network ID that identifies the particular network the host belongs to, and a host ID uniquely identifying the host itself on ...

  • Ericsson W20 - page 62

    Glossary 58 581/1551-CRH 102 167 Uen Rev A 2006-09-07 Protocol A set of rules governing the transmission of data. In order for a data transmission to work, both ends of the connection have to follow the rules of the protocol. PSK Pre-Shared Key. An easy-to-set-up home mode for network access allowing for manually entering of keys and pass phrases. ...

  • Ericsson W20 - page 63

    Glossary 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 59 TCP/IP Transmission Control Protocol / Internet Protocol. The basic protocols used on the Internet. TCP is responsible for dividing data up into packets for delivery and reassembling them at the destination. IP is responsible f or delivering the packets from source to destination. When TCP and IP ...

  • Ericsson W20 - page 64

    Glossary 60 601/1551-CRH 102 167 Uen Rev A 2006-09-07 Wireless A common term used to describe telecommunications in which radio waves (rather than some form of wire) carry the signal over part or all of the communication path. WLAN Wireless Local Area Network. A WLAN is a network in which a mobile user can connect to a LAN through a wireless (radio ...

  • Ericsson W20 - page 65

    ...

  • Ericsson W20 - page 66

    Ericsson Enterprise AB © Ericsson Enterprise AB 2006 - All Rights Reserved www.ericsson.com 1/1551-CRH 102 167 Uen Rev A 2006-09 -07 ...

Manufacturer Ericsson Category Network Router

Documents that we receive from a manufacturer of a Ericsson W20 can be divided into several groups. They are, among others:
- Ericsson technical drawings
- W20 manuals
- Ericsson product data sheets
- information booklets
- or energy labels Ericsson W20
All of them are important, but the most important information from the point of view of use of the device are in the user manual Ericsson W20.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals Ericsson W20, service manual, brief instructions and user manuals Ericsson W20. Depending on your needs, you should look for the document you need. In our website you can view the most popular manual of the product Ericsson W20.

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A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use Ericsson W20 by users. Manuals are usually written by a technical writer, but in a language understandable to all users of Ericsson W20.

A complete Ericsson manual, should contain several basic components. Some of them are less important, such as: cover / title page or copyright page. However, the remaining part should provide us with information that is important from the point of view of the user.

1. Preface and tips on how to use the manual Ericsson W20 - At the beginning of each manual we should find clues about how to use the guidelines. It should include information about the location of the Contents of the Ericsson W20, FAQ or common problems, i.e. places that are most often searched by users in each manual
2. Contents - index of all tips concerning the Ericsson W20, that we can find in the current document
3. Tips how to use the basic functions of the device Ericsson W20 - which should help us in our first steps of using Ericsson W20
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with Ericsson W20
5. FAQ - Frequently Asked Questions
6. Contact detailsInformation about where to look for contact to the manufacturer/service of Ericsson W20 in a specific country, if it was not possible to solve the problem on our own.

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