Instruction/ maintenance manual of the product 3CNJ90 3Com
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NJ90 Network Jack User Guide 3CNJ90.
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User Guide NJ90 Network Jack 3CNJ90 4-port 10/100 Mbps Unmanaged Ethernet Switch http://www.3com .com/ http://www.3com.com/p roductreg 150000038600A R01 Published February 2003.
3Com Corporation 5500 Great America Parkway Santa Clara, C alifornia 95052-8145 U.S.A. Copyright © 2003 3Com Corporatio n. All rights reserved. No part of this documentation may be repro duced in any.
Table of Contents Contents 1. NJ90 Package Conte nts 1 2. NJ90 Descripti on 2 3. NJ90 Inst allation 3 Appendix A: NJ90 Specifications 5 B: Wall Outlet Dimensions 7 C: Setting up the P ower Supply 8 D:.
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1 NJ90 User Guide The 3Com Network Jack is a plat form that provides connectivity at the edge of the network infrast ructure. The NJ90 Network Jack, is a member of this family of products. The NJ90 Network Jack is a 4-port, un-mana ged Fast Ethernet swit ch that fits into most standard data port openings.
Installation Guide 2 2. NJ90 Description The following diagram shows the front view and the rear view of the NJ90 (see desc riptions be low) Figure 1 - NJ90 Feature Descrip tion 1 Four Switching Ports Allow up to four devices to be connected to the ne twork.
3. NJ90 Installatio n 3 3. NJ90 Install ation 3.1 Install th e NJ90 Network Ja ck. 3.2 Set up the power supply 3.1 - Install the NJ90 Network J ack Figure 2 - NJ90 Installati on Step 1: If the end of .
Installation Guide 4 Step 3: Mount the NJ 90 Unit to the Wall o r Cubicle O utlet with the scre ws provided. 3.2 - Set up the power supply : Selecting the powe r scheme an d installi ng it: See Appendix C: Setting up the Pow er Supply (p.8). You can verify the NJ90 Network Ja ck Inst allation by chec king the LED’s.
Appendix A: NJ90 Specificatio ns 5 Appendix A: NJ90 Specifications The NJ90 is a 4-port, un-mana ged Fast Ethernet switch tha t fits into most standard da ta port openings.
Installation Guide 6 Performance Auto-negotiation Communication speed (10 M bps or 100 Mbps) and duplex mode (full or half) is determined th rough auto-negotiation with the attached devices. The NJ90 attempts to negotiate th e fastest connection possi ble (100 Mbps full-duplex).
Appendix B: Wall Outlet Dim ensions 7 Appendix B: Wall Outlet Dimensions Make sure the wall or cubicle opening where the NJ90 is bei ng installed complies with th e NE MA-WD6 standard, as described below. Figure 4 - Wal l Outlet (NEMA-WD6) Dimen sions 2.
Installation Guide 8 Appendix C: Setting up the Power Supply Power to the NJ90 can be supplie d one of the followi ng ways: 1. Over the network via an integrated switch that supports Power over Ethernet. 2. Over the network via a multi- port Ethernet powe r supply.
Appendix C: Setting up the Power Supply 9 2) Using a Multi-port Ethernet Power Supply To use a multi-port Ethernet power su pply, you must connect the power supply to your netwo rk, as shown in figure 6 on pag e 9.
Installation Guide 10 Figure 7 - Using a Si ngle-port Ethernet Po wer Supply 4) Using the 3Com Local Power Supply If your network does not su pport Po wer over Ethernet, or if you are not using a single-port or mu lti-port Ethern et power supply, you must purc hase a loc al power s upply from 3Com.
Appendix C: Setting up the Power Supply 11 Installation Instructions: 1. Plug the power cable into the N etwork Jack. 2. Route the power cable t hrough the stain relief fix ture. 3. Secure the local power supply and cable to the wall. 4. Plug the L ocal Power Su pply into the power source.
Installation Guide 12 Appendix D: Setting up the Network Cabling at Your Site The netwo rk cabling at y our site (fr om the wir ing closet to the wall or cubicle opening) ma y already be in stall ed. If it is not, install t he cabling follow ing these gener al guidelines.
Appendix E: Troubleshooting the NJ90 13 Appendix E: Troubleshooting the NJ90 If you encounter prob lems with the NJ90: 1. Verify the NJ90 is receiving power by viewing the Power LED (it should be lit) .
Installation Guide 14 Appendix F: Contacting Technical Support 3Com provides easy access to technical support information through a variety of services. This sect ion describes these ser vices. Information contained in this section i s correct at time of publica- tion.
Appendix F: Contact ing Technical Support 15 Support from Your Network Supplier If you require additiona l assistan ce, consult you r network supplier.
Installation Guide 16.
17 The 3Com Corporation Limited Wa rranty and the Other Services described in this docu ment supe rsede any such information that may be contained with in your product user d ocumentation. This war ranty appl ies to cu stomers located in the United States, Aus- tralia, Canada (except Quebec), Irel and, New Zealand, U.
Installation Guide 18 3Com makes no warranty or representation that its soft ware prod- ucts will meet Customer ’s requiremen ts or work in combination wit h any hardware or software products provid.
LIMITED WARRANT Y 19 WARRANTIES EXCLUSIVE, WARRANTY DIS CLAIMER: TO THE FULL EXTENT ALLOWED BY LAW, THE FOREGOING WARR ANTIES AND REM- EDIES ARE EXCLUSIVE AND ARE IN LIEU OF ALL OT HER WARR ANTIES, TE.
Installation Guide 20 or the limita tion of liab ility for de ath or per sonal injury , so the above limi tations and exc lusions m a y be limited in their applicat ion to you. When the impli ed warranti es are not allowed to be excluded in their entirety, they will be limited to the duratio n of the applicable written warra nty.
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3Com Corporation 5500 Great Americ a Parkway, P.O. Box 58 145, Santa Clara , CA 95052-81 45 U.S.A. www.3com.com 150000038600A R01.
An important point after buying a device 3Com 3CNJ90 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought 3Com 3CNJ90 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data 3Com 3CNJ90 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, 3Com 3CNJ90 you will learn all the available features of the product, as well as information on its operation. The information that you get 3Com 3CNJ90 will certainly help you make a decision on the purchase.
If you already are a holder of 3Com 3CNJ90, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime 3Com 3CNJ90.
However, one of the most important roles played by the user manual is to help in solving problems with 3Com 3CNJ90. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device 3Com 3CNJ90 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
