® Part No.
3Com Corporation ■ 5400 Bayfront Plaza ■ Santa Clara, California ■ 95052-8145 © 3Com Sonix Ltd, 1996. All rights reserved. No part of this documentation may be reproduced in any form or by any means or used to make any derivative work (such as translation, transformation, or adaptation) without permission from 3Com Sonix Ltd. 3Com Sonix Ltd.
IMPORTANT SAFETY INFORMATION WARNING: Warnings contain directions that you must follow for your personal safety. Follow all instructions carefully. Please read carefully and thoroughly the following information before installing the AccessBuilder 500: ■ Exceptional care must be taken during installation and removal of the unit. ■ If the power supply plug is unsuitable and you have to replace it, you may find other codings for the respective connections.
■ There are no user-replaceable fuses or user-serviceable parts inside the unit. If you have a physical problem with the unit that cannot be solved with problem solving actions in this guide, contact your supplier. ■ Disconnect the power before moving the unit. WARNING: Twisted Pair RJ45 data port. This is a shielded RJ45 data socket. It cannot be used as a telephone socket. Only connect RJ45 data connectors to this socket.
WICHTIGE SICHERHEITSHINWEISE ACHTUNG: Die Warnungen enthalten Anweisungen, die Sie zur eigenen Sicherheit zu befolgen haben. Lesen Sie bitte die folgenden Informationen sorgfältig durch, bevor Sie den AccessBuilder 500 einbauen: ■ Auf besondere Vorsicht muß während des Ein- und Ausbaus des AccessBuilder 500s geachtet werden. ■ Falls Sie das beigelegte Stromversorgungskabel nicht verwenden können und zu ersetzen haben, finden Sie möglicherweise andere Anschlußbelegungen vor.
Fehlerkonditionen entworfen und gesichert wurde, so dass die Spannung zwischen zwei erreichbaren Teilen kein gefährliches Niveau erreicht (42.2V max. oder 60V DC). An den Anschlussbuchsen der Geräte dürfen nur die dafür vorgesehenen Anschlüsse verwendet werden. ■ Es sind keine von dem Benutzer zu ersetzende oder zu wartende Teile in dem Gerät vorhanden.
L’INFORMATION DE SÉCURITÉ IMPORTANTE AVERTISSEMENT: Les avertissements contiennent les instructions que vous devez suivre pour votre sécurité personnelle. Suivre toutes les instructions avec soin. Veuillez lire à fond l’information suivante avant d’installer le moyeu: ■ Le soin exceptionnel doit être pris pendant l’installation et l’enlèvement du moyeu.
TNV (Telecoms Network Voltage - tension réseau de télécommunications) est un circuit qui dans des conditions d'opérations normales, transfert les signeaux télécoms. SELV (Safety Extra Low Voltage - tension de sécurité extra-réduite) est un circuit secondaire désigné et protègé qui dans des conditions normales et de fautes uniques, assure que la tension entre deux éléments accessibles n'accedéra pas un niveau de sécurité (42.2V max. ou 60 V DC).
CONTENTS IMPORTANT SAFETY INFORMATION WICHTIGE SICHERHEITSHINWEISE L’INFORMATION DE SÉCURITÉ IMPORTANTE ABOUT THIS GUIDE Introduction 1 How to Use This Guide 2 Conventions 2 Additional Safety Information 4 1 GETTING STARTED Introduction 1-1 AccessBuilder 500 Features 1-1 Benefits of ISDN 1-4 Using ISDN to Support Leased Line WAN Circuits 1-5 Pack Contents Checklist 1-6 Registering Ownership Of Your AccessBuilder 500 1-7 Pre-installation Requirements 1-8 AccessBuilder 500 Front and Rear Panel Features 1-9
Installation 1-16 Siting the AccessBuilder 500 1-16 Connecting the Power 1-17 Connecting to Your 10BaseT LAN 1-18 Connecting to an Ethernet Hub 1-18 Connecting to the In-House LAN 1-19 Connecting to a Single Workstation 1-20 Connecting to Your LAN Using a Transceiver 1-20 Connecting to ISDN 1-21 Connecting to the WAN 1-22 Connecting to the Voice Port 1-22 Connecting a Management Terminal 1-22 Quick Configuration 1-24 Starting Quick Configuration 1-24 Example Using Windows 3.
Utilities Diskette 1-51 Sub-directory NOVELL 1-51 Sub-directory MIB 1-52 Sub-directory DECNET 1-52 A BRIDGING AND ROUTING Introduction A-1 Bridging and Routing Concepts A-2 Guidelines For Choosing Bridging or Routing A-2 How Bridges Learn A-3 Bridging Between Remote Sites A-4 Building a Larger Network A-5 Multiple Paths Between Bridged LANs A-6 Network Topology A-6 Broadcast Storms A-6 Optimum Use of Resource A-7 Network Organization, Structure and Physical Layout The Internet A-7 Routing IP and IPX A-8 IP
B TECHNICAL INFORMATION Specifications B-1 LAN Connector Interfaces B-1 WAN Connector Interface B-1 ISDN Connector Interface B-1 Voice Connector Interface B-1 Management Connector Interface B-2 Bridge Characteristics B-2 Performance B-2 Approvals B-3 Dimensions and Operating Requirements B-4 Interface Cable Characteristics B-5 WAN Port Connecting Cable – V.11/X.21 Support B-5 WAN Port Connecting Cable – V.24/V.28 Support B-6 WAN Port Connecting Cable – V.35/V.
INDEX LIMITED WARRANTY FCC CLASS B VERIFICATION STATEMENT
ABOUT THIS GUIDE Introduction This guide describes the features, installation and initial configuration of the AccessBuilder 500. The guide has been designed to be used by both first-time and experienced computer network users who want to install and use the AccessBuilder 500. If you are working with an ISDN bridge or router for the first time, it is possible you may make mistakes.
2 ABOUT THIS GUIDE How to Use This Guide This table shows where to find specific information: If you are looking for information on: Turn to: About the AccessBuilder 500’s features, a description of the front panel indicators and rear panel connectors and step-by-step installation and configuration instructions. Chapter 1 An overview of bridging and routing and an introduction to IP and IPX protocols. Appendix A Technical Information and cable specifications.
Conventions The text conventions used in this guide are: Convention Description “Enter” vs. “Type” When the word “enter” is used in this guide, it means type something, then press the [Return] or [Enter] key. Do not press the [Return] or [Enter] key when an instruction simply says “type.
4 ABOUT THIS GUIDE Additional Safety Information See also the Important Safety Information at the front of this guide. ■ When using the unit, observe the following safety information: ■ Retain this user’s guide for later use and pass it on in the event of change of ownership of the unit. ■ Protect the unit from sudden, transient increases and decreases in electrical power by fitting an in-line surge suppressor or uninterruptable power supply.
Additional Safety Information 5 ■ Avoid using a telephone, which is connected to the unit (other than a cordless type), during an electrical storm. There may be a remote risk of electric shock from lightning. ■ Equipment connected to the Voice port must be located in the same building as the unit. ■ Be sure nothing rests on the unit’s system cables and that the cables are not located where they can be stepped on and cause damage to the unit. ■ Keep the unit away from radiators and heat sources.
6 ABOUT THIS GUIDE
1 GETTING STARTED Introduction This chapter contains all the information you need to install and configure the AccessBuilder 500 to make it operational. You can carry out more sophisticated configuration using the information in the AccessBuilder ISDN Access Router Software Reference guide.
1-2 CHAPTER 1: GETTING STARTED The most modern and efficient of these WAN services includes ISDN (Integrated Services Digital Network). This provides a high speed dialup facility to allow your AccessBuilder 500 to automatically and quickly dial remote offices, transmit your data between remote PCs just as speedily and then disconnect the call. You incur minimum ISDN telephone charges as calls are made only when needed. This is known as Dial on Demand.
Introduction 1-3 The principal features of the AccessBuilder 500 are: ■ Easy to install, configure and support. ■ ISDN, 2B+D port, supporting Basic Rate interface of two 64 Kbps and a 16 Kbps control channel. ■ Voice port. ■ Leased line wide area network (WAN) access port. ■ Data terminal equipment (DTE) management port. ■ Support for full IP and IPX routing. ■ Protocol transparent bridging. ■ Sophisticated data packet filtering to provide network security.
1-4 CHAPTER 1: GETTING STARTED Benefits of ISDN ISDN is an extension of the national and international public switched telephone network, which offers a digital end-to-end telecommunication system, providing a better quality service than available using the analog telephone network. The principal benefits of ISDN are: ■ Fast call setup times, typically taking less than one second for national calls. ■ Greater bandwidth with multiple channels.
Introduction 1-5 Using ISDN to Support Leased Line WAN Circuits ISDN provides an ideal service to connect remote LANs. To be effective, the connecting bandwidth needed is at least 56 Kbps to achieve a realistic throughput. Slower speed links can be used but usually only when usage is low and infrequent, or if higher speed circuits cannot be provided. Leased digital point-to-point circuits can still be cost effective if usage spans many hours per day.
1-6 CHAPTER 1: GETTING STARTED Pack Contents Checklist Before you install your AccessBuilder 500, check the contents of the box against the pack contents checklist below. If any of the items have been damaged in transit or are missing, then contact the 3Com dealer from whom the equipment was purchased. ■ 1 x AccessBuilder 500 unit. ■ 1 x 2 meter mains lead with fitted with molded plug. ■ 1 x 3 meter RJ-45 to RJ-45 male plug ISDN 2 connecting cable. ■ 1 x 100 mm crossover cable.
Introduction 1-7 Figure 1-1 AccessBuilder 500 Pack Contents Registering Ownership Of Your AccessBuilder 500 A warranty registration card is enclosed in the box with your AccessBuilder 500. Please take a few moments before commencing the installation to fill in the card and post it to us.
1-8 CHAPTER 1: GETTING STARTED Pre-installation Requirements Before you install your AccessBuilder 500 you will need the following: ■ A suitable cable for connection to your LAN (or workstation if only a single workstation is attached to this unit). ■ A transceiver connected to your network cabling if the AUI port is to be used. Although the AccessBuilder 500 has two LAN connections (AUI and 10BaseT), only one port can be used at a time.
Introduction AccessBuilder 500 Front and Rear Panel Features Front Panel Figure 1-2 AccessBuilder 500 Front Panel Features POWER This LED indicator shows the following: ■ ■ ■ On – Power is connected to the unit and the rear panel On/Off switch is set to the ON position. Flash – Indicates that the unit’s main program is corrupted and needs to be reinstalled. Off – No power supplied to the unit. See “Troubleshooting” on page 1-48 for more details.
1-10 CHAPTER 1: GETTING STARTED LAN COLLISION This LED indicator provides a visual indication that a data collision has occurred on the attached LAN. Collisions are a normal part of Ethernet operation. The LED flashes to provide a visual indication of the number of data collisions that are occurring on the LAN: ■ Slow flash – Low collision activity. ■ Medium flash – Moderate collision activity. ■ Quick flash – High collision activity.
Introduction 1-11 ISDN VOICE This LED indicator provides confirmation that a voice call is in progress, or the handset is off the hook and a dial tone is present, indicating that an ISDN network connection is available. ALARM This LED indicator provides confirmation that a fault has been detected on one of the configured ports. Typically this would indicate that a serial link has gone down, or that a configured port does not have a cable connected to it.
1-12 CHAPTER 1: GETTING STARTED Front Panel Liquid Crystal Display The liquid crystal display (LCD) cycles through a number of displays for three seconds each. These are shown in the table below: Figure 1-3 Front Panel LCD Display Display Meaning NoName Unit name (when assigned). 10.0.0.1 Internet protocol (IP) address (when assigned). LAN1 T (R) LAN port transmit (and receive) loading percentage, displayed as a bar graph.
Introduction 1-13 Rear Panel Figure 1-4 AccessBuilder 500 Rear Panel Features VOICE This port is used to connect an optional public switched telephone network (PSTN) telephone handset, or any other compatible analog equipment, operating in digital tone multiple frequency (DTMF) mode, by connecting the handset’s plug into this port. This port is in effect an analog to digital convertor which allows you to use your conventional PSTN telephone on an ISDN line.
1-14 CHAPTER 1: GETTING STARTED 0.5 A (T) 250 V~ Contains the 0.5 Amp internal protection fuse for the unit. For instructions on changing the fuse, see “Renewing the Internal Protection Fuse” on page 1-50. Voltage and fuse rating may change from country to country. RESET This push-button can be used to cancel an alarm condition. It can also be used by your Technical Support service to reset or reload the EPROM. ISDN This port is used to connect to the ISDN network. The port uses an RJ45 connection socket.
Introduction 1-15 10BaseT This RJ45 port is used to provide a connection to a 10BaseT LAN. This socket allows direct connection between the AccessBuilder 500 and a single piece of equipment, as opposed to multi-point LAN connections using 10Base2 or 10Base5 cabling systems. The AccessBuilder 500 LAN port simulates the characteristics of a workstation port, which allows it to be directly connected to a LAN or network hub port as required.
1-16 CHAPTER 1: GETTING STARTED Installation Siting the AccessBuilder 500 When siting the AccessBuilder 500, ensure: ■ It is accessible and cables can be easily connected. ■ It is out of direct sunlight and away from sources of heat. ■ Cabling is away from: ■ ■ Sources of electrical noise, such as radios, transmitters and broadband amplifiers. Power lines and fluorescent lighting fixtures. ■ Water or moisture cannot enter the case of the unit.
Installation 1-17 Connecting the Power CAUTION: First, read the section; “Important Safety Information” at the start of this guide and the “Additional Safety Information” in “About This Guide”. Isolate the electrical mains system supply before commencing installation. Ensure that the On/Off switch is set to its ‘OFF’ position. 1 Plug the mains lead into the power socket of the AccessBuilder 500 (see “Rear Panel” on page 1-13).
1-18 CHAPTER 1: GETTING STARTED Connecting to Your 10BaseT LAN Figure 1-6 Connecting to the 10BaseT Port You can use the 10BaseT connection on the AccessBuilder 500 in the following ways ■ ■ ■ To connect directly to an Ethernet hub port. To connect to a 10BaseT in-house LAN socket that connects to your organization’s network. To connect to a single workstation using a 10BaseT crossover cable.
Installation 1-19 Connecting to the In-House LAN Figure 1-7 Connect The UTP Cable To In-House LAN Connection Box To connect the AccessBuilder 500 to in-house LAN: 1 Connect the UTP cable (not supplied) into RJ45 socket marked LAN on the AccessBuilder 500. 2 Connect the other end of the cable into the female socket of the in-house LAN connection box, as shown in Figure 1-7.
1-20 CHAPTER 1: GETTING STARTED Connecting to a Single Workstation To connect the AccessBuilder 500 to a single personal computer or workstation: 1 Use the 10BaseT crossover cable supplied together with a length of standard 10BaseT cable. 2 Connect the crossover cable to the 10BaseT socket on the workstation’s Ethernet adapter as shown in Figure 1-8.
Installation 1-21 Connecting to ISDN Figure 1-9 Connect ISDN Cable Into A Proprietary ISDN Wall Box Connect the supplied ISDN cable from the ISDN port into the ISDN wall box. See Figure 1-9 and Figure 1-10. (US models see the note on page 1-6) CAUTION: Do not connect the ISDN line into the AccessBuilder 500’s LAN port as the ISDN line voltage could damage the unit.
1-22 CHAPTER 1: GETTING STARTED Connecting to the WAN If you intend to use a permanent leased line connection, you can connect to a WAN Network Terminating Unit (NTU) fitted by your WAN service supplier. Using a suitable WAN cable (as described in Appendix B) connect one end to the WAN port on the AccessBuilder 500 unit and the other to the NTU. For details of configuring the AccessBuilder 500 for use with a WAN, see “Setting Up a WAN Link” on page 1-39.
Installation 1-23 Figure 1-11 Connecting The Management Cable If your PC has a 25 pin COM port, use the 9-pin to 25-pin adapter supplied with the AccessBuilder 500 to connect the manager cable to your PC as shown in Figure 1-12.
1-24 CHAPTER 1: GETTING STARTED Quick Configuration This section describes how you can configure the unit to bridge or route over ISDN links to suit most networking requirements using a simple forms-based user interface. If you want to connect to a remote site using leased line WAN links see “Setting Up a WAN Link” on page 1-39. If you are unsure about the networking configuration you require, see “Examples of Typical ISDN Networking Applications” on page 1-41 for more information.
Quick Configuration 1-25 If the cursor disappears during configuration, confirm that the Cursor Blink check-box has been checked (i.e. shows a cross in it). If the keyboard arrow keys fail to move the cursor during configuration, confirm that the ‘Use Function, Arrow, and Ctrl Keys for Windows’ check-box has not been checked. d Now save this configuration as a Windows terminal emulator file for future use.
1-26 CHAPTER 1: GETTING STARTED Figure 1-14 Quick Configuration Menu 4 At the command prompt enter QC. The screen changes to display the Quick Configuration menu shown in Figure 1-14.
Quick Configuration 1-27 About Quick Configuration You can configure the unit to connect to other Novell networks, to bridge to hosts on the same IP network (a network with the same IP network address), to route to a different IP network (an IP network with a different IP network address) and to connect to the Internet or other Point-to-Point Protocol (PPP) router.
1-28 CHAPTER 1: GETTING STARTED Setting the Unit Name Before you configure the unit to connect to any other network, you must first give the unit a name. Enter NA at the command prompt on the Quick Configuration screen to display the screen illustrated in Figure 1-15. The fields on this screen are: Unit Name Type in a suitable name for this unit.
Quick Configuration 1-29 SPID 1 and 2 Service Profile IDs (SPID) are used by some ISDN service providers in the USA. If SPID is used, enter the value you are given by your ISDN service provider. Leave this field blank if you have not been provided a SPID. Directory Number 1 and 2 Enter the ISDN number associated with each SPID. Press [CTRL]+[E] to submit these parameters.
1-30 CHAPTER 1: GETTING STARTED Remote ISDN Number Type the ISDN number of the remote unit that connects to the Novell network. Call Type Set the Call Type required for your ISDN line. Toggle this field to the Call Type required by your ISDN service provider. Press [CTRL]+[E] to submit this information. When you do this, the unit automatically makes a short call to the remote unit to interrogate the remote network for information about its servers.
Quick Configuration 1-31 Connecting to an IP Host on the Same IP Network To connect to an IP host on the same network using FastConnect, enter IPB at the command prompt on the Quick Configuration screen to display the screen illustrated in Figure 1-17. Figure 1-17 Connecting To An IP Host On The Same Network Complete the fields on this screen as follows: Remote ISDN Number Type the ISDN number of the remote unit that connects to the IP network. Call Type Set the Call Type required for your ISDN line.
1-32 CHAPTER 1: GETTING STARTED Enter SAVE at the command prompt to permanently store this configuration in the unit’s memory. Although calls to the remote site are only generated when data is addressed to a specific IP host or hosts (in our example, 191.000.000.100), any data that cannot be identified as local is also passed over the link while it is open. This can prevent the link from closing after the intended data has been transferred.
Quick Configuration 1-33 Connecting to an IP Host on a Different IP Network To connect to an IP host on a different network using FastConnect, enter IPR at the command prompt on the Quick Configuration screen to display the screen illustrated in Figure 1-18. Figure 1-18 Connecting To An IP Host On A Different Network Complete the fields on this screen as follows: Remote ISDN Number Type the ISDN number of the remote unit that connects to the remote IP network.
1-34 CHAPTER 1: GETTING STARTED If you want to use numbered links, you must enter an IP address for this port. The IP address must be on a different network or subnetwork than the unit’s LAN IP address but on the same network or subnetwork as the IP Address at the other end of the ISDN link. See Appendix A for information about numbered and unnumbered links. IP Address at the other end of the ISDN link By default this field is set to UNNUMBERED indicating unnumbered links are being used.
Quick Configuration 1-35 Connecting to the Internet or a PPP Router To connect to an Internet router or to a router using Point-to-Point Protocol (PPP), enter IN at the command prompt on the Quick Configuration screen to display the screen illustrated in Figure 1-19. Figure 1-19 Connecting To The Internet Or PPP Router Complete the fields on this screen as follows: If you are connecting to the Internet, your service provider will be able to give you the correct values for each of these fields.
1-36 CHAPTER 1: GETTING STARTED IP Address of this unit’s LAN Type the IP address of this unit. This is the address you entered on the Name screen. IP Mask of this unit’s LAN Type the IP subnet mask you entered for this unit on the Name screen. See Appendix A for more information about subnet masks. IP Address of this end of the ISDN link By default this field is set to UNNUMBERED which allows unnumbered links to be used. This option is suitable for most network configurations.
Quick Configuration 1-37 IP Mask of the remote host’s network By default, this field is set to INTERNET. Use this option if all IP traffic is to be passed to a single destination and no other route exists. If you want to route to a specific unit, type an IP subnet mask to match the address type being used. Make of remote router This option sets PPP parameters needed to connect to the remote unit in its default configuration.
1-38 CHAPTER 1: GETTING STARTED PAP Password for others to login to you By default this is set to UNUSED. If you need to use a PAP password, enter the password provided by your Internet service provider or the system administrator responsible for the remote router. Your unit verifies that the remote unit is valid by comparing its submitted PAP password with the entry in this field. The password is case-sensitive. CHAP Password to login to Remote Site By default this is set to UNUSED.
Monitoring ISDN Line Usage 1-39 Monitoring ISDN Line Usage After you have first configured the unit for use with ISDN, it is important to monitor ISDN line usage to ensure that the unit is working in the way you expect. Check the ISDN DATA LED to ensure that unexpected calls are not being made or that connections are not remaining open when you expect them to have closed. As in a conventional telephone call, charges are made regardless of what is sent down the line until the call is dropped.
1-40 CHAPTER 1: GETTING STARTED d If you are routing, edit the Port IP address to set it to UNNUMBERED or to a valid IP address for the WAN link. See Appendix A for more information about using numbered and unnumbered links. If you are bridging, leave this field at the default setting. e If necessary, change any of the other parameters to suit your WAN link. In most cases the defaults can be used. f Press [CTRL]+[E] to submit this configuration.
Examples of Typical ISDN Networking Applications 1-41 Examples of Typical ISDN Networking Applications This section describes four of the most common applications of the AccessBuilder 500. All of these configurations can be carried out using the Quick Configuration option and no further configuration is necessary to make the unit operational. However, you may want to fine tune the performance of the AccessBuilder 500.
1-42 CHAPTER 1: GETTING STARTED When no data is being passed between the workstation and server, the AccessBuilder 500 closes the ISDN connection and the units at each end of the link spoof the Novell IPX protocol so that both the workstation and server believe the connection is still valid. As soon as the unit identifies that data needs to be passed to the server, the ISDN connection is re-established without the user being aware of ever being disconnected. In this way ISDN calls are kept to a minimum.
Examples of Typical ISDN Networking Applications 1-43 IP Host on the Same IP Network If your organization operates a TCP/IP network and needs to extend the IP network over geographically remote sites, it is possible to bridge the network using the AccessBuilder 500. It is only possible to bridge where both sites have the same network address and the devices are on the same subnet. In a class C IP address, the network address is the first three groups of numbers. For example: 192.000.000.
1-44 CHAPTER 1: GETTING STARTED There are some issues about which you should be aware when implementing an IP bridging solution. ■ Although calls to the remote site are only generated when data is addressed to a specific IP host or hosts (in our example, 191.000.000.100), any data that cannot be identified as local is also passed over the link while it is open. This can prevent the link from closing after the intended data has been transferred.
Examples of Typical ISDN Networking Applications 1-45 Because the ISDN number can be associated with a remote network rather than just a specific IP host, any data for the remote network can generate an autocall and be routed over the AccessBuilder 500. If you need to connect to IP hosts on several networks, you will need to use routing to be able to communicate with the different hosts. The example shown in Figure 1-23 shows the Local Site connected to two Remote sites over ISDN.
1-46 CHAPTER 1: GETTING STARTED Internet or PPP Router Some small businesses need high-speed connections into the Internet or need to connect to large global networks used by larger organizations. When communicating with another AccessBuilder 500, the unit uses FastConnect, its own proprietary high speed protocol. However, in order to connect with other routers it needs to be configured to use the slower PPP protocol. PPP is used by many other routers.
Examples of Typical ISDN Networking Applications 1-47 Multiple Connections from a Single Site In some instances it is likely that you will need to connect to Novell servers on one site, IP hosts on the same remote site or possibly a different remote site and a connection into the Internet. This can all be achieved by running the simple configuration several times until all the desired types of connection have been configured.
1-48 CHAPTER 1: GETTING STARTED Troubleshooting WARNING: There are no user serviceable components inside the case of the unit. CAUTION: Read the section ‘Important Safety information’, at the start of this manual. The AccessBuilder 500 is fully performance tested after assembly. Providing the unit has been correctly installed, and is used in accordance with the instructions contained in this manual, difficulties should not arise.
Troubleshooting 1-49 Malfunction Remedy The ISDN OK LED does not light. Follow the procedures as outlined for “The POWER LED does not light.” a) Ensure that the AccessBuilder 500 is powered up and the POWER LED is lit. b) Confirm that the ISDN UTP cable is correctly connected, and that the cable is attached to the socket marked ISDN. c) Confirm that the ISDN line socket that is connected to the unit is conveying an ISDN service.
1-50 CHAPTER 1: GETTING STARTED Renewing the Internal Protection Fuse CAUTION: First, read the section; 'Important safety information' at the start of this manual. Isolate the electrical mains system supply before commencing installation. Ensure all on/off power switches are set to their 'OFF' positions and the mains lead has been removed from the unit's power socket. 1 Using a small thin-bladed screwdriver, remove the fuse retainer cap.
Utilities Diskette 1-51 Utilities Diskette The AccessBuilder 500 is supplied with a software support diskette containing utilities which may help you enhance the performance of the unit. The directory structure for the diskette is shown below: The AB-UTILS directory contains three sub-directories which hold the following information, programs and utilities. Figure 1-27 Utilities Diskette Directory Structure Sub-directory NOVELL Contains two dialler programs for use with Novell NetWare: ■ macdial.
1-52 CHAPTER 1: GETTING STARTED Sub-directory MIB Contains the private SNMP MIBs in ASN1 format for use with the 3Com Impresario network management application, and for integration of a third party SNMP manager. Sub-directory DECNET Contains files which can be used for establishing ISDN calls in the DecNet environment.
A BRIDGING AND ROUTING Introduction During the initial configuration of the AccessBuilder 500 you must decide whether to configure the unit as a bridge or as a router although we may help you with this choice with our Quick Configuration options. If you are unsure which option you should choose, read this appendix to help you decide. Bridges and routers are used to connect networks together.
A-2 APPENDIX A: BRIDGING AND ROUTING Bridging and Routing Concepts A bridge connects one or more LANs together. It examines each data frame received at a LAN port and forwards any frames that it assumes are for a destination device not connected to that LAN port. The bridge is able to do this by learning which devices are connected to each LAN port.
Bridging and Routing Concepts A-3 How Bridges Learn When a bridge is first powered on, it does not know the number or the locations of stations that are connected to the LAN. To minimize the amount of data passed over the bridge it must learn the whereabouts (address) of stations to ensure that it passes only the data that is intended to be passed over the bridge.
A-4 APPENDIX A: BRIDGING AND ROUTING Some bridges allow address information to be manually configured into the bridge, provided the automatic learning facility is turned off, although this will not normally prove necessary unless specific traffic filtering is required. You can also configure a number of other features to improve the performance and operation of the AccessBuilder 500.
Bridging and Routing Concepts A-5 The AccessBuilder 500 uses FastConnect, its own protocol, to ensure the most efficient connection with other AccessBuilder units. However, if you are connecting to a different type of bridge/router the standard PPP communications protocol is required to establish the link. You can configure outgoing calls to use either FastConnect or PPP as required.
A-6 APPENDIX A: BRIDGING AND ROUTING Multiple Paths Between Bridged LANs With only a single physical path between LANs, the network is susceptible to link and bridge failures. In the event of a failure, the connection between any of the LANs upstream or downstream of the point of failure will be broken. A more resilient network of interconnected LANs can be established by providing more than one link between any two of the LANs.
Bridging and Routing Concepts A-7 Optimum Use of Resource Bridged networks use Spanning Tree Protocol (STP) to provide network resilience, by retaining redundant links on stand-by, in case the primary link fails. This means that you are not making maximum use of available resources. Routing protocols make each node aware of the primary and alternate routes available, ensuring that resources are not wasted.
A-8 APPENDIX A: BRIDGING AND ROUTING Routing IP and IPX Running a bridged network allows workstations to communicate directly between one another. A PC user wishing to communicate with a remote network server is totally unaware of any intervening bridges. This is known as transparent operation. Figure A-3 Example Network It is important to understand that in a bridged network the addressing structure for both IP and IPX relates to a single network.
File Transfer Protocol (FTP) Network File Store (NFS) A-9 Telnet TRANSPORT NETWORK Internet Protocol (IP) and Internet Control Message Protocol (ICMP) Link Level Control PHYSICAL User Database Protocol (UDP) DATA LINK SESSION PRESENTATION APPLICATION Routing IP and IPX Figure A-4 Ethernet Hardware Transmission Control Protocol (TCP) ARP RARP Others Open Systems Interconnection Network Layer Model A routing environment allows stations to communicate indirectly.
A-10 APPENDIX A: BRIDGING AND ROUTING Once the packet is received by the Router A, attached to LAN 1, it strips off the network header (refer to Figure A-5) and examines the Layer 3 datalink header information. It then reviews its routing tables in order to establish where to forward the data packet. It is possible that the LAN 1 router has multiple outgoing ports that would allow different transmission routes to the destination network.
Routing IP and IPX A-11 Different protocols use differing network characteristics or metrics when making routing decisions. The metric employed by RIP is a Hop Count. A hop count is defined by the number of routing nodes there are between the source and destination units. In our example, there are two hops between LAN1 and LAN 2 going via Routers A and B. If traffic was directed via Routers A, D, and then B, this would be three hops.
A-12 APPENDIX A: BRIDGING AND ROUTING IPX Routing Novell IPX also uses RIP for routing purposes. Although it is similarly named to the IP equivalent, it uses a different protocol. IPX RIP broadcasts datagrams out onto the network every sixty seconds. Upon receipt of a RIP datagram, a router adds one to the hop count of each route advertised and broadcasts a RIP datagram to the other networks, with which it is connected. The cost of a route in an IPX network is determined by the metric known as ticks.
Routing IP and IPX A-13 IP Addresses TCP/IP Numbering and subnet masking IP numbers or addresses are normally made up of four fields (normally called bytes), with each byte having a whole number value of between 0 and 255, and the bytes separated by a full stop. For example: 123.123.123.123 An IP address is divided into two sections, one is the Network Address section and the other is the Host Address section. For example: 123.123.|123.
A-14 APPENDIX A: BRIDGING AND ROUTING Using of any of the address classes in a private TCP/IP network is not a problem, providing that connections outside of that private network to external public or private TCP/IP networks are never needed.
Routing IP and IPX A-15 This is achieved by the addition of a /xx number at the end of the configured address. For example: 193.123.123.123/32 The /32 appended to the IP number indicates that all four of the bytes are used and must have valid entries. A /24 mask, for example: 193.123.123.0/24 means that only the first three bytes are to be recognized and used, and the last byte can be ignored. In this case, any IP address appearing on the locally connected LAN in the range 193.123.123.0 to 193.123.123.
A-16 APPENDIX A: BRIDGING AND ROUTING Obtaining an IP Address If you want to use a unique IP addressing system on your network so you can connect to the Internet, there are three organizations responsible for allocating network addresses. These details are correct at the time of printing but may change.
Routing IP and IPX Asia Pacific Network Information Center (APNIC-DOM) Attention: Asia Pacific Network Information Center (APNIC-DOM) c/o Computer Center University of Tokyo 2-11-16 Yahoi Bunkyo-ku, Tokyo 113 Japan Admin. Contact: Telephone: e-mail: Nakayama, Masaya (MN89) +81 3 3812 211 ext2720 nakayama@nic.ad.jp Technical Contact: Telephone: Fax: e-mail: Conrad, David (DC296) 81 3 3580 3781 or 3580 81 3 3580 3782 davidc@apnic.
A-18 APPENDIX A: BRIDGING AND ROUTING Numbered and Unnumbered Links When routing and using the AccessBuilder 500’s FastConnect protocol over ISDN links as opposed to PPP, you have the option of using numbered or unnumbered links. A numbered link requires a valid IP address to be configured for both ports connected to each end of the link. The IP address used must be for a different subnet or network than that used by either LAN at each end of the link. An example is shown in Figure A-6.
B TECHNICAL INFORMATION Specifications LAN Connector Interfaces ■ 15-way D-type female AUI connector. ■ 10BaseT via an RJ45 connector socket for UTP. Only one LAN connection can be used at a time. WAN Connector Interface 25-way D-type female connector, configured to support one of: ■ V.11 (X.21) for speeds up to 2.048 Mbps. ■ V.28 (V.24/RS232) for speeds up to 19.2 Kbps. ■ V.35/V.36 for speeds up to 2.048 Mbps.
B-2 APPENDIX B: TECHNICAL INFORMATION Management Connector Interface 9-way D-type to sub RJ11 connector for use with a VT100 compliant terminal or PC. ■ Local and remote terminal management. ■ TCP/IP Telnet menu driven management interface for remote management. ■ Software upgrades, enhancements and configurations downloadable from network attached terminal or PC. ■ SNMP MIB II support with private extensions for management of unique features. Bridge Characteristics ■ 802.3 MAC layer bridge.
Approvals B-3 Approvals This product ostensibly complies with the electro-magnetic compatibility (EMC) requirements of EN 55022 Class A and EN 50082 (susceptibility). However, to fully comply with Class B of EN55022 the following prerequisites should be observed: ■ The WAN port must be attached to a screened digital cable. ■ The ISDN cable must be used in conjunction with a three turn ferrite.
B-4 APPENDIX B: TECHNICAL INFORMATION Dimensions and Operating Requirements Power Supply: 240 V AC, 50/60 Hz (nominal) UK and Europe Power Supply: 110 V AC 50/60 Hz (nominal) (USA) Power Consumption: 25 Watts Operating Temperature: 0-40°C (32-105°F) Humidity: 0-90% non-condensing
Interface Cable Characteristics B-5 Interface Cable Characteristics WAN Port Connecting Cable – V.11/X.21 Support The WAN port terminates with a 25-way D-type female connector. The port can be configured to support V.11 signalling characteristics at data transfer rates up to 2.048 Mbps. The WAN port connecting cable is not supplied with the unit. The following signalling characteristics should be observed when purchasing or fabricating a suitable cable.
B-6 APPENDIX B: TECHNICAL INFORMATION WAN Port Connecting Cable – V.24/V.28 Support The WAN port terminates with a 25-way D-type female connector. The port can be configured to support V.24 or V.28 signalling characteristics at data transfer rates up to 19.2 Kbps. The WAN port connecting cable is not supplied with the unit. The following signalling characteristics should be observed when purchasing or fabricating a suitable cable.
Interface Cable Characteristics B-7 WAN Port Connecting Cable – V.35/V.36 Support The WAN port terminates with a 25-way D-type female connector. The port can be configured to support V.36 signalling characteristics at data transfer rates up to 48 Kbps. The WAN port connecting cable is not supplied with the unit. The following signalling characteristics should be observed when purchasing or fabricating a suitable cable.
B-8 APPENDIX B: TECHNICAL INFORMATION Manager Port Connecting Cable The manager port cable terminates with an RJ11 connector at one end and a 9-pin male/female D-type connector. The pin-out table below show the pin outs for this cable.
Interface Cable Characteristics B-9 LAN Port Connecting Cable - 10BaseT The 10BaseT port terminates with an RJ45 connector which can be connected to the 10BaseT port on another device. The table below shows the pin-outs for a straight through cable.
B-10 APPENDIX B: TECHNICAL INFORMATION LAN Port Connecting Cable - AUI The AUI port terminates with a 15-pin female connector which must be connected to a transceiver on a LAN using an AUI (drop) cable. This cable is not supplied with the unit. The following signal characteristics must be observed when purchasing or fabricating a suitable cable.
Ordering Information B-11 Ordering Information 3C401000 3C401005 AccessBuilder Remote Office 500 (UK and Europe) AccessBuilder Remote Office 500 (USA) 731/000024 9-pin D-type plug to RJ11 plug (Manager port cable). 731/000024 9-pin D-type plug to RJ45 plug, with 3 meters of cable. 733/000028 RJ45 to RJ45 plug, with 1.5 meters of UTP cable (ISDN cable). 733/000001 RJ45 to RJ45 plug, with 3 meters of UTP cable (ISDN cable). 3C409000 25-pin to 25-pin D-type plug, with 3 meters of cable (V.24).
B-12 APPENDIX B: TECHNICAL INFORMATION
C GLOSSARY 10Base2 An IEEE standard for using IEEE 802.3 protocol at 10 Mbps over thin Ethernet cable. 10Base5 An IEEE standard for using IEEE 802.3 protocol at 10 Mbps over thick Ethernet cable. 10BaseT An IEEE standard for using IEEE 802.3 protocol at 10 Mbps over unshielded twisted-pair cable (the T stands for twisted pair). 100BaseVG An IEEE standard for using the new IEEE 802.12 protocol at 100 Mbps over unshielded twisted-pair cable of type 5 or type 3.
C-2 APPENDIX C: GLOSSARY ASCII American Standard Code for Information Interchange, a standard that defines the values that are used for letters, numbers, and symbols. Attenuation The progressive degradation of a signal as it travels through a cable. AUI Attachment user interface, the interface between the unit and the data terminal equipment, usually in the form of a connecting cable. B Channel A digital data communications channel running at 64 Kbps.
C-3 Bus A single segment through which devices are connected. An Ethernet LAN is based on a bus network which connects all communicating workstations with a common cable. Byte A string that consists of eight data bits treated as a unit. Call Guillotine A feature that disconnects a call after a certain period of time irrespective of whether data is being passed across the link or not.
C-4 APPENDIX C: GLOSSARY D Channel A control channel carrying signalling information, running at 16 Kbps. The basic rate ISDN 2 service carries two B channels plus one control D channel. Refer to ISDN and B Channel. Data Characters or code either entered by the user or passed between devices that are part of the computer or network. Data communications The transfer of data via transceiver equipment by means of data transmission according to a protocol. Refer to Protocol.
C-5 FastConnect The OfficeConnect Remote’s proprietary connection protocol that allows fast connection between units either over the ISDN link or over a permanent leased line WAN link. Fiber optics A technology that uses laser light pulses, sent over thin glass fibres, which is able to deliver data at speed up to several gigabits per second. File server A computer running a special operating system that allows workstations to access files.
C-6 APPENDIX C: GLOSSARY ISDN Integrated Services Digital Network. A multi-channel digital end-to-end telecommunications network that provides a virtually error free transmission of data. ISO International Standards Organization. Refer to Open Systems Interconnection. Kbps A measurement of data transmission speed in kilo bits per second. Keep alives A message sent by one network device to inform another network device that the virtual circuit between them is still active.
C-7 Network layer The third layer of the OSI reference model. This layer is responsible for controlling message traffic. NFS A network file system developed by Sun Microsystems for shared files over a UNIX platform. Node An alternative name for a computer or device (such as a printer or modem) that is connected to a network. NOS Network operating system.
C-8 APPENDIX C: GLOSSARY Presentation layer The sixth layer of the OSI network layer model. This layer controls the formatting and translation of data. Protocol A set of rules and procedures that govern the exchange of data between two communicating systems. PSTN Public switched telephone network. Quick Configuration A set of menu driven forms in the management system that allow you to configure the unit for most types of ISDN connection. REN Ringer equivalence number. RIP Routing information protocol.
C-9 STP Spanning tree protocol, a protocol which prevents network loops. Terminal The Microsoft Windows™ terminal emulation program. Terminators Devices that are used at the ends of a linear bus network segment to reflect the signal back and prevent failure of the segment. TCP/IP Transmission control protocol/Internet protocol, a set of communication protocols that support peer-to-peer connectivity functions for both local and wide area networks.
C-10 APPENDIX C: GLOSSARY
D TECHNICAL SUPPORT 3Com provides easy access to technical support information through the variety of services described in this appendix. On-line Technical Services 3Com offers worldwide product support seven days a week, 24 hours a day, through the following on-line systems: ■ 3Com Bulletin Board Service (3ComBBS). ■ World Wide Web site. 3Com Bulletin Board Service 3ComBBS contains patches, software, and drivers for all 3Com products, as well as technical articles.
D-2 APPENDIX D: TECHNICAL SUPPORT Call the telephone number nearest you: Country Data Rate Telephone Number Australia up to 14400 bps (61) (2) 9955 2073 France up to 14400 bps (33) (1) 69 86 69 54 Germany up to 9600 bps (49) (89) 627 32 188 or (49) (89) 627 32 189 Hong Kong up to 14400 bps (852) 2537 5608 Italy (fee required) up to 14400 bps (39) (2) 273 00680 Japan up to 14400 bps (81) (3) 3345 7266 Singapore up to 14400 bps (65) 534 5693 Taiwan up to 14400 bps (886) (2) 377 583
Support from Your Network Supplier D-3 Support from Your Network Supplier If additional assistance is required, contact your network supplier. Many suppliers are authorized 3Com service partners who are qualified to provide a variety of services, including network planning, installation, hardware maintenance, application training, and support services. When you contact your network supplier for assistance, have the following information ready: ■ Diagnostic error messages.
D-4 APPENDIX D: TECHNICAL SUPPORT Support from 3Com If you are unable to receive support from your network supplier, technical support contracts are available from 3Com. In the U.S. and Canada, call (800) 876-3266 for customer service. If you are outside the U.S.
Returning Products for Repair D-5 Returning Products for Repair A product sent directly to 3Com for repair must first be assigned a Return Materials Authorization (RMA) number. A product sent to 3Com without an RMA number will be returned to the sender unopened, at the sender’s expense. To obtain an RMA number, call or fax: Country Telephone Number Fax Number U.S. and Canada (800) 876 3266, option 2 (408) 764 7120 Europe 31 30 60 29900, option 5 (44) (1442) 275822 Outside Europe, U.S.
D-6 APPENDIX D: TECHNICAL SUPPORT
INDEX Numerics 10BaseT connections 1-18 10BaseT port 1-15 3Com Bulletin Board Service (3ComBBS) D-1 3Com sales offices D-4 A ALARM LED 1-11 ALERT LED 1-11 AUI connections 1-20 AUI port 1-15 B bridging and routing concepts A-1 bulletin board service D-1 C commands IN 1-35 IPB 1-31 IPR 1-33 NA 1-28 NO 1-29 QC 1-26 concepts - bridging and routing A-1 configuring your unit 1-24 connecting telephony equipment 1-22 connecting to 1-35 Internet 1-35 IP hosts on different networks 1-33 IP hosts on same network 1
2 INDEX LAN (continued) AUI connections 1-20 AUI port 1-15 LAN COLLISION 1-10 LAN RECEIVE 1-10 LAN SEND 1-10 LEDs ALARM 1-11 Alert 1-11 ISDN DATA 1-10 ISDN OK 1-10 ISDN VOICE 1-11 LAN COLLISION 1-10 LAN RECEIVE 1-10 LAN SEND 1-10 POWER 1-9 M management configuring your unit 1-24 management port 1-14 R rear panel 0.
LIMITED WARRANTY HARDWARE: 3Com warrants its hardware products to be free from defects in workmanship and materials, under normal use and service, for the following lengths of time from the date of purchase from 3Com or its Authorized Reseller: Internetworking products Network adapters Ethernet stackable hubs and unmanaged Ethernet fixed port repeaters One year Lifetime Lifetime* (One year if not registered) *Power supply and fans in these stackable hubs and unmanaged repeaters One year Other hardware prod
3COM SHALL NOT BE LIABLE UNDER THIS WARRANTY IF ITS TESTING AND EXAMINATION DISCLOSE THAT THE ALLEGED DEFECT IN THE PRODUCT DOES NOT EXIST OR WAS CAUSED BY CUSTOMER'S OR ANY THIRD PERSON'S MISUSE, NEGLECT, IMPROPER INSTALLATION OR TESTING, UNAUTHORIZED ATTEMPTS TO REPAIR, OR ANY OTHER CAUSE BEYOND THE RANGE OF THE INTENDED USE, OR BY ACCIDENT, FIRE, LIGHTNING, OR OTHER HAZARD.
FCC CLASS B VERIFICATION STATEMENT This equipment has been tested and found to comply with the limits for a class B digital device, pursuant to part 15 of FCC Rules. These limits are designed to provide reasonable protection against harmful radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference with radio communications. However, there is no guarantee that interference will not occur in a particular installation.
