3Com 520 manual

P a r t N o. 980/000033 /001 P ublished Janua r y 1 99 6 O F F I C E C O N N E C T TM R E M O T E 510, 520, 530 U S E R G U I D E Please read the Supplementa r y Information se c tion of this manual for details of the Office C onne c t 53 1 model and an EMC Update FRONT.FRM Page 1 Thursday, July 10, 1997 10:07 AM[...]

3Com C orporation ■ 5400 Bayfr ont Plaza ■ S an ta Clara, California ■ 95052-8154 © 3Com Sonix Limited , 1996. All rights reserved. No par t 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 a daptatio n) withou t per mi ssion from 3Com Sonix. 3Com[...]

I M P O R T A N T S A F E T Y I N F O R M A T I O N WA R N I N G : Warnings contain di rections that you must follow for your per sonal safety . Follow all instructions car efully . Please read c arefully and thoroughly the following information before installing the O fficeConnect Remote: ■ Exceptional care must be taken during installation and [...]

W I C H T I G E S I C H E R H E I T S H I N W E I S E ACHT UNG: Die W a rnungen enthalten Anweisungen, die Sie zur eigenen Sicherheit zu befolgen haben. Lesen Sie bitte die folgenden Informationen sorgfältig durch, bevor Sie den O fficeConnect Remo te einbauen: ■ Auf besondere Vorsicht muß während des Ein- un d Ausbaus des OfficeCon nect Remot[...]

L’ I N F O R M A T I O N D E S É C U R I T É I M P O R T A N T E A VERTISSEMENT: Les av er tissements contienn ent les instructions qu e vous dev ez suivre pour v otre sécurité personnelle. Suivre toutes les instruc tions av ec soin. Ve uillez lire à fond l’information suiv ante avant d’installer le moyeu: ■ Le soin exceptionne l doit [...]

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C O N T E N T S I M P O R T A N T S A F E T Y I N F O R M A T I O N W I C H T I G E S I C H E R H E I T S H I N W E I S E L’ I N F O R M A T I O N D E S É C U R I T É I M P O R T A N T E A B O U T T H I S G U I D E Introduction 1 How to Use This Guide 1 Con ventions 2 Additional Safety Information 3 1 G E T T I N G S T A R T E D Introduction 1-[...]

Monitoring ISDN Line Usage 1-28 Setting Up a W AN Link 1-28 Examples of T ypical ISD N Networ k ing Applications 1-30 Novell Network 1-30 IP Host on the Same IP Netw ork 1 -31 IP Host on Another IP Network 1-33 Internet or PPP Router 1-34 Multiple Connections from a Single Site 1-35 T roubleshooting 1-36 A B R I D G I N G A N D R O U T I N G Introd[...]

C G L O S S A R Y D T E C H N I C A L S U P P O R T On-line T echnical Ser vices D-1 3Com Bulletin Board Service D-1 World Wide W eb Site D-2 Support from Y our Network Supplier D-2 Support from 3Com D-2 Returning Products for Repair D-3 I N D E X Rc.bk : RC.TOC Page iii Thursday, July 10, 1997 9:53 AM[...]

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A B O U T T H I S G U I D E 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 fo[...]

2 A B O U T T H I S G U I D E C on ven tions The icon conventions tha t are used throughout this guide are: The text conventions used in this guide are: Icon Type Description Informa tion Note Information notes call attention to important features or instructions. Caution Cautions alert you to personal safety risk, system damage, or loss of data. W[...]

Additional Sa fety Information 3 Additional Safety Informa tion See also the Important Safet y 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. ■ The power adapter supplied with t[...]

4 A B O U T T H I S G U I D E ■ Do not push any objects into the openings of the unit. Doing so can cause fire or electric shock by shorting out inter nal components. ■ A void 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. ?[...]

1 G E T T I N G S T A R T E D Introduction W elcome to the world of int er-networking with 3Com ® . This chapter contains all the info rmation you need to in stall and con figure t he OfficeConn ect Remote to make it operational. Y ou can carr y out more sophisticated configuration using th e information in the Soft ware Reference guide. In the mo[...]

1-2 C H A P T E R 1: G E T T I N G S T A R T E D ISDN can also be used to make voice calls using the OfficeConnect R emote 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 por [...]

Introduction 1-3 The principal features of the O fficeConnec t Remote are: ■ Easy to install, configure and suppor t . ■ ISDN, 2B+D por t, supporting Basic Rate inter face 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 ( W AN) access port .[...]

1-4 C H A P T E R 1: G E T T I N G S T A R T E D Using ISDN to Suppor t L eased Line W AN Circui ts ISDN provides an ideal service to connect remote LANs. T o be effec tiv e, 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 [...]

Introduction 1-5 Registering Ownership Of Y our OfficeC onnec t 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. Pre-installa tion Requirements Before you install your OfficeConnect Remote you will need the f[...]

1-6 C H A P T E R 1: G E T T I N G S T A R T E D OfficeC onnec t Remote F ront and Rear P anel Fea tures Fro nt Pa ne l Figure 1-1 OfficeConnect R emote Front P anel 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[...]

Introduction 1-7 ■ Quick flash – Self test or software loading during power up. ■ Off – No power supplied to the unit. See “ T roubleshooting” on page 1-38 for more details. LINK (Orange) This LED indicator shows the condition of the LAN connection: ■ Off – No LAN connection detected. ■ On – LAN connected. ISDN OK (Green) This L[...]

1-8 C H A P T E R 1: G E T T I N G S T A R T E D VOICE ( Y ellow) If a V oice port is fitted this LED shows the status of the voice connection: ■ On – A voice call is in progress . ■ Flashing – Indicat es 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 ringin[...]

Introduction 1-9 Rear Panel Figure 1-2 OfficeConnect Remote Rear P anel F eature s POWER Only use the power adapter supplied with the OfficeConnect Remote to connect to the mains power supply . Do not use any other adapt er with this unit. If the plug on the power adapter does not match the mains inlet socket, contact your reseller for further advi[...]

1-10 C H A P T E R 1: G E T T I N G S T A R T E D COA X (10Base2 Coaxial P or t ) – The coaxial LAN por t allows a 10Base2 Ethernet segment to be connected directly to the O fficeC onnect Remote. If the unit is to be installed at the end of a cable run, then a 50 Ohm terminator must be fitted t o the 10Base2 cable connector . This port can be use[...]

Introduction 1-11 VOICE (where fitted) This port is used to connec t 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 por t. This port is in effect an analog to digital convertor wh[...]

1-12 C H A P T E R 1: G E T T I N G S T A R T E D Installation Siting the OfficeConnect Remote When siting the OfficeConnect R emot e, ensure: ■ It is accessible and cables can be easily connec t ed. ■ It is out of direc t sunlight and away from sources of heat. ■ Cabling is away from: ■ Sources of electrical noise, such as radios, transmit[...]

Using the Rubbe r Feet and Stackin g Clips 1-13 Figure 1-3 Clipping Y our Units T ogether Repeat these steps to secure the other side. T o remov e a clip , hold the units firmly with one hand and hook the first finger of your other hand around the back of the clip. Use r easonab le for ce to pull it off. W all Mounting the OfficeC onnect Remote The[...]

1-14 C H A P T E R 1: G E T T I N G S T A R T E D C onnect ing the P ower A dapter CAUTION: F irst, read the section; “Important Safet y Information” at the start of this manual. Isolate the electric al mains system supply before commencing installat ion. Ensure any o n/off power swit ches at the outlet socket a re set to their ‘ OFF’ posit[...]

Using the Rubbe r Feet and Stackin g Clips 1-15 Figure 1-5 Connect The UTP Cable T o In-House Lan Connection B ox T o connect the OfficeConnect Remote to i n-house LAN: 1 Connect the UTP cable (not supplied) into RJ45 socket marked LAN on the O fficeC onnec t Remot e. 2 Connect the other end of the cable into the female socket of the in-house LAN c[...]

1-16 C H A P T E R 1: G E T T I N G S T A R T E D C onnecting to Y our 10Base2 LAN Y o u can use the10Base2 C oaxial port to connec t t o your network and to other OfficeConnect units. When using 10Base2 cable , it is important that both ends of the segment are properly terminat ed with 50 O hm end piec es. Only use 50 Ohm 10BaseT cables and use a [...]

Using the Rubbe r Feet and Stackin g Clips 1-17 C onnecting to ISDN Figure 1-7 Connect ISDN Cable Int o A Pro prietary ISDN Wall Box Connect the supplied ISDN cable from the ISDN por t into the ISDN wall box (NT1). See Fig ure 1-7 . CAUTION: Do not connect the ISDN line into the OfficeConnect R emot e ’ s L A N port as the ISDN li ne voltage coul[...]

1-18 C H A P T E R 1: G E T T I N G S T A R T E D The VOICE port is terminated with an RJ-11 so cket. If your telephone equipment uses a different connect or , you will need to obtain a suitable convertor to connect to the VOICE port. A British T elecom to RJ11 convertor is supplied with UK models fitt ed with a V oice port. A dial tone is not prov[...]

Quick Configuration 1-19 Quick C onfiguration This section describes how you can configure the unit to bridge or route over ISDN links t o suit most networking requirements using a simple forms-based user interface. If you want to connect to a remote site using leased line W AN links see “Setting Up a WA N L i n k ” on page 1-29 . If you are un[...]

1-20 C H A P T E R 1: G E T T I N G S T A R T E D If you are using Windows 95, use the Hyperterminal application and c onfigure it in the same way as described above. Figure 1-8 The Main Menu Scree n 2 If the terminal emulator has been correctly configured, pr essing [RETURN] disp la ys the Enter Passw ord screen. 3 Enter the default password, PASS[...]

Quick Configuration 1-21 About Quick C onfiguration Y ou can configure the unit to connect to other Nov ell networks, t o 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 net work with a different IP network add ress) and to connect to the Internet or other P oint-to-P oi[...]

1-22 C H A P T E R 1: G E T T I N G S T A R T E D Setting the Unit Name Before you configur e 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 t o display the screen illustrated in F igure 1-10 . The fields on this screen are: Unit Name T ype in a suitabl[...]

Quick Configuration 1-23 C onnecting to a Novell (IPX) Network T o connect to a Nov ell network using F astConnect, enter NO at the command prompt on the Quick Configuration screen t o display the screen illustrat ed in F igure 1-11 . Figure 1-11 Connecting T o A Novell Netw ork Complete the fields on this screen as follows: Do you hav e a local se[...]

1-24 C H A P T E R 1: G E T T I N G S T A R T E D C onnecting to an IP Host on the Same IP Network T o connect to an IP host on the same network using F astConnect, enter IPB at the command prompt on the Quick Configuration screen to displa y the screen illustrated in F igure 1-12 . Figure 1-12 Connecting T o An IP Host On The Same Network Complete[...]

Quick Configuration 1-25 T o avoid this situation you can also c onfigure the units at both ends of the link to implement a F irewall and/or set the Maximum Call Duration in the ISDN parameters screen to reduce the amoun t of traffic permitted to pass across the link. See the Softw are Reference guide for more information about these features. Alte[...]

1-26 C H A P T E R 1: G E T T I N G S T A R T E D Remote ISDN Number T ype the ISDN number of the remote unit that connects to the remote IP network. Call T ype Set the Call T ype 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 .[...]

Quick Configuration 1-27 C onnecting to the Internet or a PPP Router T o connect to an Internet router or t o a router using Poin t-to-P oint Protoc ol (PPP), enter IN at the command prompt on the Quick Configuration screen to display the screen illustrated in F igure 1-14 . Figure 1-14 Connecting T o The Internet Or PPP Rout er Complete the fields[...]

1-28 C H A P T E R 1: G E T T I N G S T A R T E D IP Address of th is 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[...]

Quick Configuration 1-29 ■ 3Com – 3C om NETBuilder router . ■ Cisco – Cisco router . ■ Ascend – Ascend router . ■ Spider – Spider/Shiva rout er . I f you are connecting to a Spider/Shiva router , you need also to edit the ISDN port ’ s configuration and set the P AP field in the L CP Configuration scr een to Incoming . See the Sof[...]

1-30 C H A P T E R 1: G E T T I N G S T A R T E D Monitoring ISDN Line U sage After you have first configured the unit for use w ith ISDN, it is impor tant 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 a re not being made or that connections are [...]

Setting Up a WAN Link 1-31 d If you are routing , edit the Port IP address to set it to UNNUMBERED or to a valid IP address for the W AN 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 [...]

1-32 C H A P T E R 1: G E T T I N G S T A R T E D Examples of T ypical ISDN Network ing 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 Conf igur ation option and no further configuration is necessary to make the unit operational. Ho[...]

Examples of Typical ISDN Networking Appli cations 1-33 disconnected. In this way ISDN calls are k ept to a minimum. Figure 1-16 Connecting to a Remote Novell Netwo rk In the example shown in F igure 1-16 , the Local Site is connected to a Remote Site. The L ocal Site shown has several workstations and a server but could equally consist solely of wo[...]

1-34 C H A P T E R 1: G E T T I N G S T A R T E D IP Host on the Same IP Network If your organization operates a T CP/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 hav e the same network address and [...]

Examples of Typical ISDN Networking Appli cations 1-35 several IP hosts to generat e autocalls to the remot e site. When c ombined with the problem described above , you could find your ISDN line permanently connected. T o avoid this situation you need t o be sure that no devices or applications exist on your local site that could make unnecessar y[...]

1-36 C H A P T E R 1: G E T T I N G S T A R T E D Figure 1-18 IP routed netw ork Internet or PPP Router Some small businesses need high-speed connections into the Internet or need to connec t to large global networks used by larger organizations. When communicating with another O fficeConnec t Remote, the unit uses F astConnect, its own proprietar [...]

Examples of Typical ISDN Networking Appli cations 1-37 Figure 1-19 PPP C onnections to the I nternet and C orporate Netwo rk Rc.bk : RC01.FRM Page 37 Thursday, July 10, 1997 9:53 AM[...]

1-38 C H A P T E R 1: G E T T I N G S T A R T E D 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 differ ent remote sit e and a connection into the Internet. This can all be achieved by running the simple configura tio[...]

Troubleshooting 1-39 T roubleshooting W ARNING: There are no u ser serviceable components inside the case of the unit. CAUTION: Read the section ‘Important Safety information ’ , at the start of this manual. The OfficeConnect R emot e is fully per formance tested after assembly . Pr oviding the unit has been correctly installed, and is used in [...]

1-40 C H A P T E R 1: G E T T I N G S T A R T E D The ISDN OK LED does not light. Follow the procedures as outlined for “T h e POWER LED does not light.” a) Ensure that the OfficeConnec t Remote 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 [...]

A B R I D G I N G A N D R O U T I N G Introduction During the initial configuration of the OfficeConnect Remote you must decide whether to configur e 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 dec[...]

A-2 B R I D G I N G A N D R O U T I N G Guidelines F or 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 mor e explanation and t o help decide which of the above conditions apply to your ne twork. ?[...]

Bridging and Routing Concepts A-3 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[...]

A-4 B R I D G I N G A N D R O U T I N G Fig u re A -1 Simple Remot e Bridging The OfficeConnect Remote uses F astConnect, its own protocol, to ensure the most efficient connection with other OfficeConnect Remote units. However , if you are connecting to a different type of bridge/router the standard PPP communications protocol is required to establ[...]

Bridging and Routing Concepts A-5 Fig u re A -2 Multiple Remot e Bridges Multiple Pa ths 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[...]

A-6 B R I D G I N G A N D R O U T I N G Network T opology 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 t opology is a complex mix of both leased line and ISDN circuits , running at 64 Kbps to 2 Mbps. Broadcast St orms Bri[...]

Routing IP and IPX A-7 Network Organiza tion, Structure and Physi cal L a yout Some organizations are structured into depar tments determined by the physical la yout of their work envir onment, so it is natural t o divide the corporate network into separate logical networks. Routing becomes the obvious candidate for handling these individual LANs. [...]

A-8 B R I D G I N G A N D R O U T I N G It is impor tant to understand that in a bridged network the addressing structure for both IP and IPX relates to a single network. If the units in Fi gu re A- 3 were bridges and not routers, then an IP node on LAN A could , for example, hav e an address 140.56.10.0, the node on LAN B an address 140.56.10.2, a[...]

Routing IP and IPX A-9 A routing environment allows stations to communicate indirectly . F ollowing the example in Fi gu re A- 3 , let us assume that a station on LAN 1 wan ts to communicat e with a network server on LAN 2. The station on LAN 1, constructs a Layer 2 datalink he ader (see Fi gu re A- 5 ), with the source stat ion ’ s hardware addr[...]

A-10 B R I D G I N G A N D R O U T I N G Different protocols use differing network characteristics or metrics when making routing decisions. The metric employed by RIP is a Hop Coun t . A hop count is defined by the number of routing nodes there are betw een the source and destination units. In our example , there are two hops between LAN1 and LAN [...]

Routing IP and IPX A-11 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 sixt y seconds. Upon receipt of a RIP datagram, a r outer adds one to the hop count of each r oute advertised and broadcasts a R[...]

A-12 B R I D G I N G A N D R O U T I N G IP Addr esses T CP/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 . F or example: 123.123.123.123 An IP address is divided into tw o s[...]

Routing IP and IPX A-13 Subnet Masking Subnet Masking is a mecha nism 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 struct ur e to that of the[...]

A-14 B R I D G I N G A N D R O U T I N G Obtaining an IP A ddress If you want to use a unique IP addressing system on your network so you can connect to the Int er net , there are three or ganizations responsible for allocating network addresses. These details are correct at the time of printing but may change. USA - InterNIC, Network So lutions At[...]

Numbered and Unnumb ered Links A-15 Admin. C ontac t: Nakayama, Masaya (MN89) T elephone: +81 3 3812 211 ext2720 e-mail: nakayama@nic.ad.jp T echnical Contact: Conrad , David (DC296) T elephone: 81 3 3580 3781 or 3580 F ax: 81 3 3580 3782 e-mail: davidc@apnic.net Numbered and Unnumber ed Links When routing and using the OfficeConnect Remote’ s F [...]

A-16 B R I D G I N G A N D R O U T I N G Rc.bk : RCAPPA.FRM Page 16 Thursday, July 10, 1997 9:53 AM[...]

B T E C H N I C A L I N F O R M A T I O N Specifications LAN Connector Interfaces ■ 10Base2 via a coaxial connector . ■ 10BaseT via an RJ45 connector socket for UTP . Only one LAN connection can be used at a time W AN Connector Inte rface 25-way D-type female connector , configured to support one of: ■ V .11 (X.21) for speeds up to 2.048 Mbps[...]

B-2 T E C H N I C A L I N F O R M A T I O N Bridge Characteristics ■ 802.3 MAC lay er bridge. ■ 802.1D spanning tree algorithm. ■ Support for bridge triangulation and link load sharing. P er formanc e ■ LAN filtering rate: 10000 frames per second . ■ LAN for war d ing rat e: 4000 frames per second. ISDN and W AN for war ding rates are dep[...]

Approvals B-3 FC C Requirement This product has been verified to comply with the limits of Class B computing device pursuant to Subpar t J of P ar t 15 of the FC C Rules. W ARNING: This product generates and uses r adio frequency energy and , if not installed and used properly , that is, in strict accordance with the manufacturer ’ s instructions[...]

B-4 T E C H N I C A L I N F O R M A T I O N Dimensions Rc.bk : RCAPPB.FRM Page 4 Thursday, July 10, 1997 9:53 AM[...]

Interface Cable Characte ristics B-5 Interface Cable Char acteristics W AN Port Connecting C able – V .11/X.21 Suppor t The W AN 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 W AN por t connecting cable is not supplied wit[...]

B-6 T E C H N I C A L I N F O R M A T I O N W AN P ort Connecting Cable – V .24/V .28 Suppor t The W AN port terminates with a 25-way D-type female connector . The port can be configured to suppor t V .24 or V .28 signalling charac t eristics at data transfer rates up to 19.2 Kbps. The W AN por t connecting cable is not supplied with the unit. Th[...]

Interface Cable Characte ristics B-7 W AN Po r t C onnecting Cable – V .35/V .36 Suppor t The W AN 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 W AN por t connecting cable is not supplied with the unit. The following signall[...]

B-8 T E C H N I C A L I N F O R M A T I O N Manager P ort Connecting Cable The manager port cable terminates with a 9 pin female connector at one end and a 9-pin male/female D-type connector or 25-pin D-type male/female connector . The pin-out tables below show the pin outs for both variants. 3Com end pin no. (9-way male connector) Signal Name Pin [...]

Interface Cable Characte ristics B-9 Modem Cable 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 por t’ s 9 pin D-type connector to a 25-pin serial por t on a modem. LAN P ort Connecting Cable - 10BaseT The 10BaseT port terminates with an RJ45 connector which [...]

B-10 T E C H N I C A L I N F O R M A T I O N Ordering Information 3C410000 OfficeConnect Remote 510s 3C410005 OfficeConnect Remote 520s 3C4100010 OfficeConnect Remote 530s 3C4100015 OfficeConnect Remote 510u 3C4100020 OfficeConnect Remote 520u 3C4100025 OfficeConnect Remote 530u 3C16740 Po wer adapter (US) 3C16741 Po wer adapter (UK) 3C16742 Po wer[...]

C G L O S S A R Y 10Base2 An IEEE standard for using IEEE 802.3 protocol at 10 Mbps o ver thin Ethernet cable. 10Base5 An IEEE standard for using IEEE 802.3 protocol at 10 Mbps o ver thick Ethernet cable . 10BaseT An IEEE standard for using IEEE 802.3 protocol at 10 Mbps o ver unshielded twisted-pair cable (the T stands for twisted pair). 100BaseVG[...]

C-2 C H A P T E R C: G L O S S A R 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 communica[...]

C-3 CHAP Challenge Handshake Authentication Prot ocol. Part of the PPP protocol to ensure authentication of the connection between two devices. Class T ype of IP address. IP addresses fall into three main classes, A, B and C. Client A user whom is making use of a par ticular system resource or peripheral through a workstation attached to a local or[...]

C-4 C H A P T E R C: G L O S S A R 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 la yer The second layer of the OSI reference model. This layer is r esponsible for controlling message traffic. Data packet (packet) A sequence of binar y digits , including data and co[...]

C-5 Fra me The method by which a data packet is constructed to be sent across a network. Usually assembled with header and footer information. Gateway Another name for a router on a netw ork. HDL C High-level Data Link Control. OSI’ s bit orientated protocol. Hop count The number of routing nodes between a source and destination device on a LAN o[...]

C-6 C H A P T E R C: G L O S S A R Y MAN Metropolitan area network, a network that covers a city . MIB Management information base. NETBIOS Network Basic Input/Output System, a standard for supporting network communications that is independent of the underlying network transport t ype . NetW are Novell’ s Network Operating System (NOS) line. Netw[...]

C-7 Physi cal l ayer The first lay er 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. Po lling A method of controlling terminals on a multi-point network where each device is interrogated , in turn, to determine if the d[...]

C-8 C H A P T E R C: G L O S S A R Y SNMP Simple network management prot ocol, a software program to allow the remot e management of bridge and routing devices. Static Route A route y ou have enter ed and made permanent rather than a route that the unit has learned by connecting to other routers. STP Spanning tree protocol, a protocol which prevent[...]

D T E C H N I C A L S U P P O R T 3Com pro vides easy access to technical support information through a variety of services. This appendix describes these ser vic es. On-line T echnical Services 3Com offers worldwide pr oduc t support seven days a week, 24 hours a day , through the following on-line systems: ■ 3Com Bulletin Board Service (3ComBBS[...]

D-2 T E C H N I C A L S U P P O R T W orld Wide W eb Site Access the latest networking information on 3Com ’ s W o rld Wide W eb site by entering our URL int o your Internet browser: http://www.3c om.com/ This serv ice featur es news and information about 3Com products, cust omer ser vice and support, 3Com ’ s latest news releases, selected art[...]

Returning Products for Repai r D-3 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. T o obtain an RMA number , call or fax: * These numbers[...]

D-4 T E C H N I C A L S U P P O R T Rc.bk : TECHSUPP.FRM Page 4 Thursday, July 10, 1997 9:53 AM[...]

I N D E X Numerics 10Base2 1-9 connections 1-14 10BaseT connections 1-13 crossover 1-9 por t 1-9 3Com Bulletin Board Service (3ComBBS) D-1 3Com sales offices D-2 A ALERT LED 1-6 B bridging and routing concepts A-1 bulletin board service D-1 C clipping hubs together 1-11 clips 1-11 coaxial cable 1-9 commands IN 1-25 IPB 1-22 IPR 1-23 NA 1-20 NO 1-21[...]

L LAN 10Base2 connections 1-14 10BaseT connections 1-13 10BaseT port 1-9 LEDs Alert 1-6 ISDN OK 1-7 ISDN1 1-7 ISDN2 1-7 LINK ST A TE 1-7 Network Utili z a tion 1-7 POWER 1-6 SERIAL W AN 1-7 VOICE 1-7 LINK ST A TE LED 1-7 M managem ent configuring your unit 1-17 port 1-8 MDI/MDIX switch 1-9 N network supplier support D-2 Network Utili zation LEDs 1-[...]

LIMITED W ARRANTY HARDW ARE: 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 f rom the date of purchase from 3Com or its Authorized Reseller: Internetworking products One year Network adapte rs Lifetime Ethernet stac kable hubs and Unmanaged Et[...]

O F F I C E C O N N E C T R E M O T E S U P P L E M E N T A R Y I N F O R M A T I O N OfficeC onnect 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 pr ovided by the OfficeConnect Remote /A software upgrade) to be[...]