FRONT.FRM Page 1 Thursday, July 10, 1997 10:07 AM OFFICECONNECT REMOTE TM 510, 520, 530 USER GUIDE Please read the Supplementary Information section of this manual for details of the OfficeConnect 531 model and an EMC Update Part No.
Rc.bk : FRONT.FRM Page 2 Thursday, July 10, 1997 9:53 AM 3Com Corporation ■ 5400 Bayfront Plaza © 3Com Sonix Limited, 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.
Rc.bk : RCSAFETY.FRM Page iii Thursday, July 10, 1997 9:53 AM IMPORTANT SAFETY INFORMATION WARNING: Warnings contain directions that you must follow for your personal safety. Follow all instructions carefully. Ports identified by the labels SERIAL, COAX, 10BASET and WAN = SELV TNV (telecoms network voltage) is a circuit which under normal operating conditions carries telecommunication signals.
Rc.bk : RCSAFETY.FRM Page iv Thursday, July 10, 1997 9:53 AM WICHTIGE SICHERHEITSHINWEISE ACHTUNG: Die Warnungen enthalten Anweisungen, die Sie zur eigenen Sicherheit zu befolgen haben. TNV (Telecoms Network Voltage - Spannung des Telekommunikationsnetzwerks) ist ein Anschluss, der unter normalen Umständen Telekommunikationssignale enthält .
Rc.bk : RCSAFETY.FRM Page v Thursday, July 10, 1997 9:53 AM 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. TNV (Telecoms Network Voltage - tension réseau de télécommunications) est un circuit qui dans des conditions d'opérations normales, transfert les signeaux télécoms.
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Rc.bk : RCATG.FRM Page 1 Thursday, July 10, 1997 9:53 AM ABOUT THIS GUIDE Introduction This guide describes the features, installation and initial configuration of the OfficeConnect Remote. The guide has been designed to be used by both first-time and experienced computer network users who want to install and use the OfficeConnect Remote. xxx If you are working with an ISDN bridge or router for the first time, it is possible you may make mistakes.
Rc.bk : RCATG.FRM Page 2 Thursday, July 10, 1997 9:53 AM 2 ABOUT THIS GUIDE The text conventions used in this guide are: Conventions The icon conventions that are used throughout this guide are: Icon Type Description Information Note Information notes call attention to important features or instructions. Caution Warning Cautions alert you to personal safety risk, system damage, or loss of data. Warnings alert you to the risk of severe personal injury. Convention Description “Enter” vs.
Rc.bk : RCATG.FRM Page 3 Thursday, July 10, 1997 9:53 AM Additional Safety Information ■ Additional Safety Information See also the Important Safety Information at the front of this guide. ■ ■ ■ If any of the following conditions occur, isolate the electricity supply and refer to your 3Com reseller. ■ If the case or cover is not correctly fitted. ■ If the case is damaged.
Rc.bk : RCATG.FRM Page 4 Thursday, July 10, 1997 9:53 AM ABOUT THIS GUIDE 4 ■ Do not push any objects into the openings of the unit. Doing so can cause fire or electric shock by shorting out internal components. ■ 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.
Rc.bk : RC01.FRM Page 1 Thursday, July 10, 1997 9:53 AM 1 GETTING STARTED Introduction Welcome to the world of inter-networking with 3Com® . This chapter contains all the information you need to install and configure the OfficeConnect Remote to make it operational. You can carry out more sophisticated configuration using the information in the Software Reference guide. In the modern business environment sharing information is crucial.
Rc.bk : RC01.FRM Page 2 Thursday, July 10, 1997 9:53 AM 1-2 CHAPTER 1: GETTING STARTED ISDN can also be used to make voice calls using the OfficeConnect Remote from an ordinary telephone handset, connect faxes and other similar office equipment. All OfficeConnect Remote models have facilities for ISDN data transmission. Some models have an additional port for voice calls and/or a port to handle a third category of connection over a serial WAN port.
Rc.bk : RC01.FRM Page 3 Thursday, July 10, 1997 9:53 AM Introduction The principal features of the OfficeConnect Remote are: ■ Easy to install, configure and support. ■ ISDN, 2B+D port, supporting Basic Rate interface of two 64 Kbps (or two 56 Kbps channels in the USA) and a 16 Kbps control channel. ■ Optional voice port. ■ Optional Leased line wide area network (WAN) access port. ■ Data terminal equipment (DTE) management port ■ Support for full IP and IPX routing.
Rc.bk : RC01.FRM Page 4 Thursday, July 10, 1997 9:53 AM 1-4 CHAPTER 1: GETTING STARTED 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 64 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.
Rc.bk : RC01.FRM Page 5 Thursday, July 10, 1997 9:53 AM Introduction Registering Ownership Of Your OfficeConnect Remote A warranty registration card is enclosed in the box with your OfficeConnect Remote. Please take a few moments before commencing the installation to fill in the card and post it to us.
Rc.bk : RC01.FRM Page 6 Thursday, July 10, 1997 9:53 AM CHAPTER 1: GETTING STARTED 1-6 OfficeConnect Remote Front and Rear Panel Features Front Panel Figure 1-1 OfficeConnect Remote Front Panel Features ! ALERT (Orange) This LED indicator shows four states. ■ ■ ■ ■ Off – Normal operation and no faults detected. Slow flash – Loading software during power up or new software is being downloaded to the unit. Quick flash – Self test during power up. On – Problem detected.
Rc.bk : RC01.FRM Page 7 Thursday, July 10, 1997 9:53 AM Introduction ■ ■ Quick flash – Self test or software loading during power up. Off – No power supplied to the unit. See “Troubleshooting” on page 1-38 for more details. 1-7 LINK (Orange) This LED indicator shows the condition of the LAN connection: ■ Off – No LAN connection detected. ■ On – LAN connected. ISDN OK (Green) This LED indicator provides confirmation of the state of the ISDN line.
Rc.bk : RC01.FRM Page 8 Thursday, July 10, 1997 9:53 AM CHAPTER 1: GETTING STARTED 1-8 VOICE (Yellow) If a Voice port is fitted this LED shows the status of the voice connection: ■ ■ On – A voice call is in progress. Flashing – Indicates that handset is off the hook and a dial tone is present or a call is being dialled or ringing out. It also shows if the handset is ringing (receiving an incoming call). WAN (Yellow) This LED indicator provides confirmation of the state of the WAN link (if fitted).
Rc.bk : RC01.FRM Page 9 Thursday, July 10, 1997 9:53 AM Introduction 1-9 Rear Panel Figure 1-2 OfficeConnect Remote Rear Panel Features POWER Only use the power adapter supplied with the OfficeConnect Remote to connect to the mains power supply. Do not use any other adapter with this unit. If the plug on the power adapter does not match the mains inlet socket, contact your reseller for further advice.
Rc.bk : RC01.FRM Page 10 Thursday, July 10, 1997 9:53 AM 1-10 CHAPTER 1: GETTING STARTED COAX (10Base2 Coaxial Port) – The coaxial LAN port allows a 10Base2 Ethernet segment to be connected directly to the OfficeConnect Remote. If the unit is to be installed at the end of a cable run, then a 50 Ohm terminator must be fitted to the 10Base2 cable connector. This port can be used to connect to OfficeConnect hubs. MDI/MDIX Switch Affects the operation of the 10BaseT LAN port.
Rc.bk : RC01.FRM Page 11 Thursday, July 10, 1997 9:53 AM Introduction VOICE (where fitted) 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.
Rc.bk : RC01.FRM Page 12 Thursday, July 10, 1997 9:53 AM CHAPTER 1: GETTING STARTED 1-12 Installation Using the Rubber Feet and Stacking Clips The four self-adhesive rubber feet prevent your hub from sliding around on your desk. Stick the feet to the marked areas at each corner of the underside of your hub. Siting the OfficeConnect Remote When siting the OfficeConnect Remote, ensure: ■ It is accessible and cables can be easily connected. ■ It is out of direct sunlight and away from sources of heat.
Rc.bk : RC01.FRM Page 13 Thursday, July 10, 1997 9:53 AM Using the Rubber Feet and Stacking Clips 1-13 Wall Mounting the OfficeConnect Remote There are two slots on the underside of the OfficeConnect Remote which are used for wall mounting. You can mount the unit with the LEDs facing upwards or downwards, to suit your needs. When wall mounting your OfficeConnect Remote, ensure that it is within reach of the mains socket. You need two suitable screws.
Rc.bk : RC01.FRM Page 14 Thursday, July 10, 1997 9:53 AM 1-14 CHAPTER 1: GETTING STARTED Connecting the Power Adapter Connecting to Your 10BaseT LAN CAUTION: First, read the section; “Important Safety Information” at the start of this manual. Isolate the electrical mains system supply before commencing installation. Ensure any on/off power switches at the outlet socket are set to their ‘OFF’ positions.
Rc.bk : RC01.FRM Page 15 Thursday, July 10, 1997 9:53 AM Using the Rubber Feet and Stacking Clips 1-15 Connecting to a Single Workstation To connect the OfficeConnect Remote to a single personal computer or workstation: Figure 1-5 Connect The UTP Cable To In-House Lan Connection Box To connect the OfficeConnect Remote to in-house LAN: 1 Connect the UTP cable (not supplied) into RJ45 socket marked LAN on the OfficeConnect Remote.
Rc.bk : RC01.FRM Page 16 Thursday, July 10, 1997 9:53 AM 1-16 CHAPTER 1: GETTING STARTED Connecting to Your 10Base2 LAN You can use the10Base2 Coaxial port to connect to your network and to other OfficeConnect units. When using 10Base2 cable, it is important that both ends of the segment are properly terminated with 50 Ohm end pieces. Only use 50 Ohm 10BaseT cables and use a ‘Y’ piece for each unit to ensure adequate clearance of the other ports.
Rc.bk : RC01.FRM Page 17 Thursday, July 10, 1997 9:53 AM Using the Rubber Feet and Stacking Clips Connecting to ISDN 1-17 Connecting to the WAN If your OfficeConnect Remote unit is fitted with a WAN port, 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 OfficeConnect Remote unit and the other to the NTU.
Rc.bk : RC01.FRM Page 18 Thursday, July 10, 1997 9:53 AM 1-18 CHAPTER 1: GETTING STARTED The VOICE port is terminated with an RJ-11 socket. If your telephone equipment uses a different connector, you will need to obtain a suitable convertor to connect to the VOICE port. A British Telecom to RJ11 convertor is supplied with UK models fitted with a Voice port. A dial tone is not provided to the handset if the ISDN line is not operational or has been disconnected.
Rc.bk : RC01.FRM Page 19 Thursday, July 10, 1997 9:53 AM Quick Configuration 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 1-29.
Rc.bk : RC01.FRM Page 20 Thursday, July 10, 1997 9:53 AM 1-20 CHAPTER 1: GETTING STARTED If you are using Windows 95, use the Hyperterminal application and configure it in the same way as described above. Figure 1-8 The Main Menu Screen 2 If the terminal emulator has been correctly configured, pressing [RETURN] displays the Enter Password screen. 3 Enter the default password, PASSWORD using uppercase characters. The Main Menu appears as shown in Figure 1-8.
Rc.bk : RC01.FRM Page 21 Thursday, July 10, 1997 9:53 AM Quick Configuration 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.
Rc.bk : RC01.FRM Page 22 Thursday, July 10, 1997 9:53 AM 1-22 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 1-10. The fields on this screen are: Unit Name Type in a suitable name for this unit.
Rc.bk : RC01.FRM Page 23 Thursday, July 10, 1997 9:53 AM Quick Configuration Connecting to a Novell (IPX) Network To connect to a Novell network using FastConnect, enter NO at the command prompt on the Quick Configuration screen to display the screen illustrated in Figure 1-11. 1-23 Do you have a local server? Use the [Spacebar] to toggle this field to Yes or No as appropriate.
Rc.bk : RC01.FRM Page 24 Thursday, July 10, 1997 9:53 AM 1-24 CHAPTER 1: GETTING STARTED 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 1-12. Remote ISDN Number Type the ISDN number of the remote unit that connects to the IP network. Call Type Set the Call Type for each ISDN number. Use 64k Unrestricted for Euro ISDN lines.
Rc.bk : RC01.FRM Page 25 Thursday, July 10, 1997 9:53 AM Quick Configuration To avoid this situation you can also configure the units at both ends of the link to implement a Firewall and/or set the Maximum Call Duration in the ISDN parameters screen to reduce the amount of traffic permitted to pass across the link. See the Software Reference guide for more information about these features.
Rc.bk : RC01.FRM Page 26 Thursday, July 10, 1997 9:53 AM 1-26 CHAPTER 1: GETTING STARTED Remote ISDN Number Type the ISDN number of the remote unit that connects to the remote IP network. Call Type Set the Call Type for each ISDN number. Use 64k Unrestricted for Euro ISDN lines. Use 56k V.110 or 56k_restricted in the USA depending on the requirements of your ISDN service provider. IP Address of this unit’s LAN Type the IP address of this unit. This the address you entered on the Name screen.
Rc.bk : RC01.FRM Page 27 Thursday, July 10, 1997 9:53 AM Quick Configuration 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 1-14. 1-27 If you are connecting to the Internet, your service provider will be able to give you the correct values for each of these fields.
Rc.bk : RC01.FRM Page 28 Thursday, July 10, 1997 9:53 AM 1-28 CHAPTER 1: GETTING STARTED 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 options is suitable for most network configurations. See Appendix A for more information about numbered and unnumbered links. If you want to use numbered links, you must enter an IP address for this port that is on a different network or subnetwork than the unit’s IP address.
Rc.bk : RC01.FRM Page 29 Thursday, July 10, 1997 9:53 AM Quick Configuration ■ 3Com – 3Com NETBuilder router. ■ Cisco – Cisco router. ■ Ascend – Ascend router. ■ Spider – Spider/Shiva router. If you are connecting to a Spider/Shiva router, you need also to edit the ISDN port’s configuration and set the PAP field in the LCP Configuration screen to Incoming. See the Software Reference guide for details. PAP Password to login to Remote Site By default this is set to UNUSED.
Rc.bk : RC01.FRM Page 30 Thursday, July 10, 1997 9:53 AM 1-30 CHAPTER 1: GETTING STARTED Monitoring ISDN Line Usage Setting Up a WAN Link 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 1 and ISDN 2 LEDs to ensure that unexpected calls are not being made or that connections are not remaining open when you expect them to have closed.
Rc.bk : RC01.FRM Page 31 Thursday, July 10, 1997 9:53 AM Setting Up a WAN Link 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.
Rc.bk : RC01.FRM Page 32 Thursday, July 10, 1997 9:53 AM 1-32 CHAPTER 1: GETTING STARTED Examples of Typical ISDN Networking Applications This section describes four of the most common applications of the OfficeConnect Remote. 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 OfficeConnect Remote.
Rc.bk : RC01.FRM Page 33 Thursday, July 10, 1997 9:53 AM Examples of Typical ISDN Networking Applications disconnected. In this way ISDN calls are kept to a minimum. Figure 1-16 Connecting to a Remote Novell Network In the example shown in Figure 1-16, the Local Site is connected to a Remote Site. The Local Site shown has several workstations and a server but could equally consist solely of workstations or even a single workstation (such as in the case of a homeworker).
Rc.bk : RC01.FRM Page 34 Thursday, July 10, 1997 9:53 AM 1-34 CHAPTER 1: GETTING STARTED 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 OfficeConnect Remote. 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.
Rc.bk : RC01.FRM Page 35 Thursday, July 10, 1997 9:53 AM Examples of Typical ISDN Networking Applications several IP hosts to generate autocalls to the remote site. When combined with the problem described above, you could find your ISDN line permanently connected. To avoid this situation you need to be sure that no devices or applications exist on your local site that could make unnecessary and costly calls to your remote site.
Rc.bk : RC01.FRM Page 36 Thursday, July 10, 1997 9:53 AM 1-36 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 OfficeConnect Remote, 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.
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Rc.bk : RC01.FRM Page 38 Thursday, July 10, 1997 9:53 AM 1-38 CHAPTER 1: GETTING STARTED 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.
Rc.bk : RC01.FRM Page 39 Thursday, July 10, 1997 9:53 AM Troubleshooting 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 OfficeConnect Remote 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.
Rc.bk : RC01.FRM Page 40 Thursday, July 10, 1997 9:53 AM 1-40 CHAPTER 1: GETTING STARTED Malfunction Remedy Malfunction Remedy The ISDN OK LED does not light. Follow the procedures as outlined for “The POWER LED does not light.” If other LEDs do not light during operation of the unit. During normal operation the remaining unit LEDs should light and extinguish depending on the action being taken.
Rc.bk : RCAPPA.FRM Page 1 Thursday, July 10, 1997 9:53 AM A BRIDGING AND ROUTING Introduction During the initial configuration of the OfficeConnect Remote 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.
Rc.bk : RCAPPA.FRM Page 2 Thursday, July 10, 1997 9:53 AM A-2 BRIDGING AND ROUTING Guidelines For Choosing Bridging or Routing The list below outlines some of the reasons why you might choose to configure the OfficeConnect Remote as a bridge or a router. Read through the rest of this appendix for more explanation and to help decide which of the above conditions apply to your network.
Rc.bk : RCAPPA.FRM Page 3 Thursday, July 10, 1997 9:53 AM Bridging and Routing Concepts local LAN because it does not recognize the destination station as local. However, if the destination device is on the local LAN, once it replies to the original source station, its own source address is part of the data frame and it is learned by the bridge and added to the address table. By operating in this way, the amount of data forwarded by the bridge is kept to a minimum.
Rc.bk : RCAPPA.FRM Page 4 Thursday, July 10, 1997 9:53 AM A-4 BRIDGING AND ROUTING being used on incoming calls and switches to the protocol necessary for that connection. If you are using ISDN to connect to different networks, the two B channels can be used independently to connect to different networks at the same time. Building a Larger Network Large networks of interconnected LANs can be established by using multiple bridges as illustrated in Figure A-2.
Rc.bk : RCAPPA.FRM Page 5 Thursday, July 10, 1997 9:53 AM Bridging and Routing Concepts A-5 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.
Rc.bk : RCAPPA.FRM Page 6 Thursday, July 10, 1997 9:53 AM A-6 BRIDGING AND ROUTING Network Topology If your network topology is star shaped, a combination of ISDN and bridging is usually the most efficient and successful option. Routing is a better solution if your network topology is a complex mix of both leased line and ISDN circuits, running at 64 Kbps to 2 Mbps. Broadcast Storms Bridges are programmed to automatically forward data packets by default while routers filter data packets by default.
Rc.bk : RCAPPA.FRM Page 7 Thursday, July 10, 1997 9:53 AM Routing IP and IPX Network Organization, Structure and Physical Layout Some organizations are structured into departments determined by the physical layout of their work environment, so it is natural to divide the corporate network into separate logical networks. Routing becomes the obvious candidate for handling these individual LANs.
Rc.bk : RCAPPA.FRM Page 8 Thursday, July 10, 1997 9:53 AM TRANSPORT SESSION Telnet User Database Protocol (UDP) NETWORK However, if there were NetWare nodes throughout the three bridged sites, they would also share the same IPX network number.
Rc.bk : RCAPPA.FRM Page 9 Thursday, July 10, 1997 9:53 AM Routing IP and IPX A-9 A routing environment allows stations to communicate indirectly. Following the example in Figure A-3, let us assume that a station on LAN 1 wants to communicate with a network server on LAN 2. The station on LAN 1, constructs a Layer 2 datalink header (see Figure A-5), with the source station’s hardware address, and also the destination hardware address of the local router.
Rc.bk : RCAPPA.FRM Page 10 Thursday, July 10, 1997 9:53 AM A-10 BRIDGING AND ROUTING 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.
Rc.bk : RCAPPA.FRM Page 11 Thursday, July 10, 1997 9:53 AM Routing IP and IPX 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.
Rc.bk : RCAPPA.FRM Page 12 Thursday, July 10, 1997 9:53 AM A-12 BRIDGING AND ROUTING 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: ■ For a Class C IP address the numbers in the first, second & third bytes will be in the range 192.000.001 to 223.255.254 For example: Class A 1.|123.123.
Rc.bk : RCAPPA.FRM Page 13 Thursday, July 10, 1997 9:53 AM Routing IP and IPX Subnet Masking Subnet Masking is a mechanism which can be enabled in computer and communications equipment which tells the equipment and the network, which parts of the IP address are to be used as the Network identifier and which are the Host identifier. A subnet mask consists of a similar field structure to that of the IP address (123.123.123.123). For example: 255.255.0.
Rc.bk : RCAPPA.FRM Page 14 Thursday, July 10, 1997 9:53 AM A-14 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.
Rc.bk : RCAPPA.FRM Page 15 Thursday, July 10, 1997 9:53 AM Numbered and Unnumbered Links 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.
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Rc.bk : RCAPPB.FRM Page 1 Thursday, July 10, 1997 9:53 AM B TECHNICAL INFORMATION Specifications Voice Connector Interface Provides interface for analog telephony equipment via RJ11 connector socket. Adaptors may be required for some telephone equipment connections. LAN Connector Interfaces ■ 10Base2 via a coaxial connector. ■ 10BaseT via an RJ45 connector socket for UTP.
Rc.bk : RCAPPB.FRM Page 2 Thursday, July 10, 1997 9:53 AM B-2 TECHNICAL INFORMATION Bridge Characteristics ■ 802.3 MAC layer bridge. ■ 802.1D spanning tree algorithm. ■ Support for bridge triangulation and link load sharing. Performance ■ LAN filtering rate: 10000 frames per second. ■ LAN forwarding rate: 4000 frames per second. Approvals This product ostensibly complies with the electro-magnetic compatibility (EMC) requirements of EN 55022 Class A and EN 50082 (susceptibility).
Rc.bk : RCAPPB.FRM Page 3 Thursday, July 10, 1997 9:53 AM Approvals FCC Requirement This product has been verified to comply with the limits of Class B computing device pursuant to Subpart J of Part 15 of the FCC Rules. WARNING: This product generates and uses 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 or television reception.
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Rc.bk : RCAPPB.FRM Page 5 Thursday, July 10, 1997 9:53 AM Interface Cable Characteristics 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.
Rc.bk : RCAPPB.FRM Page 6 Thursday, July 10, 1997 9:53 AM TECHNICAL INFORMATION B-6 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. 3Com end Pin Links pin no.
Rc.bk : RCAPPB.FRM Page 7 Thursday, July 10, 1997 9:53 AM Interface Cable Characteristics 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.
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Rc.bk : RCAPPB.FRM Page 9 Thursday, July 10, 1997 9:53 AM Interface Cable Characteristics Modem Cable LAN Port Connecting Cable - 10BaseT If you want to connect to the manager port using a modem, you will need a cable as shown in the table below. This connects the manager port’s 9 pin D-type connector to a 25-pin serial port on a modem.
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Rc.bk : GLOSSARY.FRM Page 1 Thursday, July 10, 1997 9:53 AM C GLOSSARY 10Base2 An IEEE standard for using IEEE 802.3 protocol at 10 Mbps over thin Ethernet cable. Age The process of removing an address from the unit’s filtering database after the device has not transmitted for a given period of time. 10Base5 An IEEE standard for using IEEE 802.3 protocol at 10 Mbps over thick Ethernet cable. ANSI American National Standards Institute. 10BaseT An IEEE standard for using IEEE 802.
Rc.bk : GLOSSARY.FRM Page 2 Thursday, July 10, 1997 9:53 AM C-2 CHAPTER C: GLOSSAR Y B Channel A digital data communications channel running at 64 Kbps. The basic rate ISDN 2 service carries two B channels plus one control D channel. Refer to ISDN and D Channel. Backbone A network cabling segment that interconnects a group of network segments or systems. Bandwidth The capacity of data communications system or channel.
Rc.bk : GLOSSARY.FRM Page 3 Thursday, July 10, 1997 9:53 AM C-3 CHAP Challenge Handshake Authentication Protocol. Part of the PPP protocol to ensure authentication of the connection between two devices. Client A user whom is making use of a particular system resource or peripheral through a workstation attached to a local or wide area network. CSMA/CD Carrier Sense Multiple Access with Collision Detection, the Ethernet protocol that allows each device to create and send its own data packets.
Rc.bk : GLOSSARY.FRM Page 4 Thursday, July 10, 1997 9:53 AM C-4 CHAPTER C: GLOSSAR Y Datagram A message that is sent from one computer or device to another to confirm it location or status on a network. Data link layer The second layer of the OSI reference model. This layer is responsible for controlling message traffic. Data packet (packet) A sequence of binary digits, including data and control signals that is transmitted across a LAN or WAN. DCE Data circuit-terminating equipment.
Rc.bk : GLOSSARY.FRM Page 5 Thursday, July 10, 1997 9:53 AM C-5 Frame The method by which a data packet is constructed to be sent across a network. Usually assembled with header and footer information. ISDN Integrated Services Digital Network. A multi-channel digital end-to-end telecommunications network that provides a virtually error free transmission of data. Gateway Another name for a router on a network. HDLC High-level Data Link Control. OSI’s bit orientated protocol.
Rc.bk : GLOSSARY.FRM Page 6 Thursday, July 10, 1997 9:53 AM C-6 CHAPTER C: GLOSSAR Y MAN Metropolitan area network, a network that covers a city. Node An alternative name for a computer or device (such as a printer or modem) that is connected to a network. MIB Management information base. NOS Network operating system. NETBIOS Network Basic Input/Output System, a standard for supporting network communications that is independent of the underlying network transport type.
Rc.bk : GLOSSARY.FRM Page 7 Thursday, July 10, 1997 9:53 AM C-7 Physical layer The first layer of the OSI network layer model. This layer manages the transfer of individual bits of data over wires, or whatever medium, that is used to connect workstations and peripherals. Polling A method of controlling terminals on a multi-point network where each device is interrogated, in turn, to determine if the device is ready to receive or transmit data. PPP Point-to-Point Protocol.
Rc.bk : GLOSSARY.FRM Page 8 Thursday, July 10, 1997 9:53 AM C-8 CHAPTER C: GLOSSAR Y SNMP Simple network management protocol, a software program to allow the remote management of bridge and routing devices. Thin Ethernet A cabling system for Ethernet connections that uses a lightweight coaxial cable. Suitable for small networks. Static Route A route you have entered and made permanent rather than a route that the unit has learned by connecting to other routers.
Rc.bk : TECHSUPP.FRM Page 1 Thursday, July 10, 1997 9:53 AM D TECHNICAL SUPPORT 3Com provides easy access to technical support information through a variety of services. This appendix describes these services.
Rc.bk : TECHSUPP.FRM Page 2 Thursday, July 10, 1997 9:53 AM D-2 TECHNICAL SUPPORT World Wide Web Site Access the latest networking information on 3Com’s World Wide Web site by entering our URL into your Internet browser: http://www.3com.com/ This service features news and information about 3Com products, customer service and support, 3Com’s latest news releases, selected articles from 3TECH™ (3Com’s award-winning technical journal) and more.
Rc.bk : TECHSUPP.FRM Page 3 Thursday, July 10, 1997 9:53 AM Returning Products for Repair Country D-3 Telephone Number Country Telephone Number Belgium 0800 71429 U.K.* 0800 966197 Brazil (55) (11) 546 0869 U.S.
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Rc.bk : WARRANTY.
981-0771.frm Page 1 Thursday, July 10, 1997 9:49 AM OFFICECONNECT REMOTE SUPPLEMENTARY INFORMATION OfficeConnect Remote 531 The OfficeConnect Remote 531 provides the same functionality as the OfficeConnect 530, with the additional on-board memory allowing more sophisticated software (such as that provided by the OfficeConnect Remote /A software upgrade) to be installed in the unit. Follow the OfficeConnect Remote 530 installation instructions described in the OfficeConnect Remote User Guide.