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3C16700.book Page i Wednesday, July 7, 1999 5:46 PM
®
OfficeConnect
Ethernet Hub 4, 4C, 8, 8C
User Guide (3C16704A, 3C16703A, 3C16700A, 3C16701A)
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n n n 3C16700.book Page ii Wednesday, July 7, 1999 5:46 PM 3Com Corporation 5400 Bayfront Plaza Santa Clara, California 95052-8145 Copyright © 1999, 3Com Technologies. All rights reserved. Microsoft, MS-DOS, Windows, and Windows NT are registered trademarks of Microsoft Corporation. Novell and NetWare are registered trademarks of No part of this documentation may be reproduced in any form or by any means Novell, Inc. or used to make any derivative work (such as translation, transformat
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3C16700.book Page 3 Wednesday, July 7, 1999 5:46 PM Introduction 5 Problem Solving for the Hub 4 and 4C 15 Creating your Network 6 The OfficeConnect Ethernet Hub 8 and 8C 17 What Else Do I Need? 6 Ethernet Hub 8 and 8C—Front 17 Workstation Connections 6 Ethernet Hub 8 and 8C—Rear 18 Transceiver Connections 6 Connecting Workstations and Other Equipment to Your Hub 19 Hub Connections 7 Connecting OfficeConnect Ethernet Hubs Together 19 10BASE-2 7 Connecting Hubs Using 10BASE-2 20 10BASE-T 7 Che
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3C16700.book Page 4 Wednesday, July 7, 1999 5:46 PM Consignes importantes de sécurité 29 Technical Support 30 Online Technical Services 30 World Wide Web Site 30 3Com Knowledgebase Web Services 30 Support from Your Network Supplier 31 Support from 3Com 31 Returning Products for Repair 34 3Com Corporation Limited Warranty 35 Electromagnetic Compatibility 38 4
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n n n n 3C16700.book Page 5 Wednesday, July 7, 1999 5:46 PM INTRODUCTION ® Figure 1 Small Network With OfficeConnect Hub and Optional Welcome to the world of networking with 3Com . In the Print Server modern business environment, communication and sharing information is crucial. Computer networks have proved to be one of the fastest modes of communication but, until HP JetDirect OfficeConnect recently, only large businesses could afford the advantage of print server ® networking. The
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n n n n n n n n 3C16700.book Page 6 Wednesday, July 7, 1999 5:46 PM CREATING YOUR NETWORK 2 An operating system (for example, Netware or What Else Do I Need? Windows 95/98) with network support configured, running on your workstations. Your OfficeConnect hub comes with: 3 One straight-through TP cable for every workstation, as One power adapter for use with the OfficeConnect hub. shown in Figure 2. A Product Registration card for you to fill out and return. In order to comply with the 10BA
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n n n n n n 3C16700.book Page 7 Wednesday, July 7, 1999 5:46 PM Hub Connections 10BASE-T Depending on what ports your hub has, you can use either If you have additional hubs you want to connect using 10BASE-T or 10BASE-2 to connect your hubs together: 10BASE-T, you need: With 10BASE-2 you can connect up to 30 hubs on a One straight-through TP cable for each extra hub. single segment, leaving all of the 10BASE-T ports free. Twisted Pair (TP) Cables With 10BASE-T you can connect up to four hub
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3C16700.book Page 8 Wednesday, July 7, 1999 5:46 PM To fit another unit: Stacking the Units Together 1 Rest the second unit on top of the clip and align it with the front of the unit below. The Rubber Feet 2 Press down gently on the unit to secure it onto the clip, The four self-adhesive rubber feet prevent your hub from ensuring the fastening pieces fit into the slots on the unit moving around on your desk. Only stick the feet to the below, as shown in Figure 3 (picture 2). marked area
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n n n n n n n n 3C16700.book Page 9 Wednesday, July 7, 1999 5:46 PM Remove any connections to the hub and locate it over the Positioning Your Hub screw heads. When in line, gently push the hub on to the wall and move it downwards to secure. When making When installing your OfficeConnect hub, ensure: connections, be careful not to push the hub up and off the It is out of direct sunlight and away from sources of wall. heat. CAUTION: Only wall mount single hubs, do not wall Cabling is away
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3C16700.book Page 10 Wednesday, July 7, 1999 5:46 PM THE OFFICECONNECT ETHERNET HUB 4 AND 4C Ethernet Hub 4 and 4C—Front Alert LED Activity LED 10BASE-T Port Status LEDs Network Utilization LEDs (Hub 4C only) orange (Hub 4 only) green/yellow green/yellow/orange Alerts you to excessive yellow Indicates the status of each 10BASE-T port. Indicates how much your network is being used. network use or an Flashes each time green — The link between the port and the next isolated (partitioned) a packe
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3C16700.book Page 11 Wednesday, July 7, 1999 5:46 PM Ethernet Hub 4 and 4C—Rear Power Adapter socket AUI port (Hub 4C only) Four 10BASE-T RJ-45 ports Only use the power adapter that is supplied with Allows 10Mbps transceivers of different media types Use 10BASE-T cable with RJ-45 this OfficeConnect hub. Do not use any other to be connected to the hub. Connecting a connectors. You can connect the adapter. transceiver automatically disables the 10BASE-2 OfficeConnect hub to any workstation po
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3C16700.book Page 12 Wednesday, July 7, 1999 5:46 PM The hub detects all port connections, so you can start using Connecting Workstations and Other your network immediately. When you need more ports, Equipment to Your Hub simply add more OfficeConnect hubs. WARNING: Please read the ‘Important Safety Connecting Transceivers to the AUI Port Information’ section before you start. You can connect a 10Mbps Ethernet transceiver to your hub (Hub 4C only), using a standard AUI cable. Connect one
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Uplink Normal AUI AUI Uplink Normal AUI Uplink Normal AUI 3C16700.book Page 13 Wednesday, July 7, 1999 5:46 PM Figure 4 Correct Hub Connections Using 10BASE-2 Connecting Hubs Using 10BASE-2 Connect a 10BASE-2 ‘Y’ piece to each of your hubs (Hub 4C only). Connect the ‘Y’ pieces with 10BASE-2 cable to form a single segment, as shown in Figure 4. Remember to terminate the two free ends of the segment by fitting 50 Ohm terminators (end pieces). terminator To disconnect a 10BASE-2 cable, twi
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n n n Uplink Normal 4 1x AUI Uplink Normal 1x AUI Uplink Normal 1x AUI 3C16700.book Page 14 Wednesday, July 7, 1999 5:46 PM Connecting Hubs Using 10BASE-T If you suspect there is a problem, refer to “Problem Solving for the Hub 4 and 4C” on page 15. You can connect hubs together with 10BASE-T in a number of ways, but for simplicity we recommend the following Figure 5 Correct Hub Connections Using 10BASE-T method, as shown in Figure 5: 1 Starting from the bottom, connect the port 4 of the
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n n 3C16700.book Page 15 Wednesday, July 7, 1999 5:46 PM PROBLEM SOLVING FOR THE HUB 4 AND 4C The OfficeConnect hub has been designed to aid you when Port Status LED yellow for a 10BASE-T port. It is likely detecting and solving possible problems with your network. that there is a loop in your network which has caused this These problems are rarely serious, the cause is usually a port to partition. Examine your connections and remove the disconnected or damaged cable, or incorrect configur
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3C16700.book Page 16 Wednesday, July 7, 1999 5:46 PM Port Status LED not lit for a 10BASE-T port that has a connection. There is a problem with this connection. Check that you are using a straight-through 10BASE-T cable which is properly connected at both ends, and is not damaged. If the cable is connected to port 4, ensure that the Uplink/Normal switch is set to Normal (out). Also check that the equipment being connected to the hub is powered on and operating correctly. Refer to Figur
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3C16700.book Page 17 Wednesday, July 7, 1999 5:46 PM THE OFFICECONNECT ETHERNET HUB 8 AND 8C Ethernet Hub 8 and 8C—Front Alert LED Activity LED Port Status LEDs orange (Hub 8 only) green/yellow Alerts you to excessive yellow Indicates the status of each port. network use or an Flashes each time a green — The link between the port and the next piece of network equipment is OK. isolated (partitioned) packet is received yellow — The port has partitioned due to a fault on that segment. 10BASE-T p
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3C16700.book Page 18 Wednesday, July 7, 1999 5:46 PM Ethernet Hub 8 and 8C—Rear 10BASE-2 port (Hub 8C only) Eight 10BASE-T RJ-45 ports Can be used to connect your hub to other OfficeConnect hubs Use 10BASE-T cable with RJ-45 connectors. You can and equipment with 10BASE-2 cabling. connect the OfficeConnect hub to any workstation or If used, it is effectively a ninth port. piece of equipment that has a 10BASE-T port. Port 8 can Refer to “Connecting Hubs Using 10BASE-2” on page 20. be used to l
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3C16700.book Page 19 Wednesday, July 7, 1999 5:46 PM The hub detects all port connections, so you can start using Connecting Workstations and Other your network immediately. When you need more ports, Equipment to Your Hub simply add more OfficeConnect hubs. WARNING: Please read the ‘Important Safety Information’ section before you start. Connecting OfficeConnect Ethernet Hubs Together WARNHINWEIS: Bitte lesen Sie den Abschnitt You can increase the number of workstations that can ‘Wichti
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3C16700.book Page 20 Wednesday, July 7, 1999 5:46 PM Figure 7 Correct Hub Connections Using 10BASE-2 Connecting Hubs Using 10BASE-2 Connect a 10BASE-2 ‘Y’ piece to each of your hubs (Hub 8C only). Connect the ‘Y’ pieces with 10BASE-2 cable to form a single segment, as shown in Figure 7. Remember to terminate the two free ends of the segment by fitting terminators (end pieces). To disconnect a 10BASE-2 cable, twist each connector counter-clockwise to unlock it, and remove it. 50 Ohm ter
