Instruction/ maintenance manual of the product NJ90 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 Swit ch http: //www.3com.com/ http: //www.3com.com/p roductreg 150000038600A R01 Published February 2003.
3Com Corpora tion 5500 Great Ameri ca Parkway Santa C lara, C alifornia 95052-81 45 U.S.A. Copyri ght © 2003 3Com Co rporation. All rights reserved. No part of this docum entation may be reprodu ced .
Table of Contents Contents 1. NJ90 P ackage Conte nts 1 2. NJ90 Des cripti on 2 3. NJ90 I nst allatio n 3 Appendix A: NJ90 Specific ations 5 B: Wall Outlet Dim ensions 7 C: Setting u p the Power Suppl.
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1 NJ90 User Guide The 3Com Network Jack is a platform that pr ovides connectivity at the edge of the netw ork infrastruct ure. The NJ90 Networ k Jack, is a member of this famil y of products. The NJ90 Net work Jack is a 4 -port, un- managed F ast Ethernet sw itch 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 ripti ons be low) Figure 1 - NJ90 Featur e Descript ion 1 Four Switching Ports Allow up to four devices to be connected to the ne twork.
3. NJ90 Insta llation 3 3. NJ90 Installation 3.1 Ins tall th e NJ90 Netw ork Jack. 3.2 Set up the power supply 3.1 - Install the NJ90 Network Jack Figure 2 - NJ90 Insta llation Step 1: If the end of t.
Installation Guide 4 Step 3: Mount th e NJ 90 Unit to th e Wal l or Cubi cle O utle t with the scr ews provided. 3.2 - Set up the power supply : Selec ting the p ower s cheme and in stalli ng it: See Appendix C: Set ting up the Power Supp ly (p.8). You can verify the NJ90 Netw ork Ja ck Installati on by checking the LED’s.
Appendix A: NJ9 0 Specifications 5 Appendix A: NJ90 Specifications The NJ90 is a 4-port, un-mana ged Fast Ethernet sw itch that fits int o most s tandard da ta port openings.
Installation Guide 6 Performance Auto-nego tiation Commu nication speed (10 Mb ps or 100 Mb ps) and dup lex mo de (full or half) is determined through auto-nego tiation with the attached devices. The NJ 90 attempts to negotiate the fastest connecti on possible (10 0 Mbps full-d uplex).
Appendix B: Wall Outlet Dime nsions 7 Appendix B: Wall Outlet Dimensions Make sure the wa ll or cub icle opening where t he NJ90 is being installed complies with the NE MA-WD6 standard, as described below. Figure 4 - Wall Outlet (NEMA-WD6) Dimensions 2.
Installation Guide 8 Appendix C: Setting up the Power Supply Power to the NJ90 can be supplie d one of the fo llowing ways: 1. Over the network via an integrated switch th at supports Power over Ethe rnet. 2. Over the network vi a a multi-po rt Etherne t power suppl y.
Appendix C: Sett ing up the Power Supply 9 2) Using a Multi-port Ethernet Power Supply To use a mult i-port Ethern et power supply, you mu st connec t the power s upply to your network, as shown in figure 6 on page 9.
Installation Guide 10 Figure 7 - Using a Si ngle-port Ethernet Power Supply 4) Using the 3Com Local Power Supply If your netw ork does not su pport Po wer over Ethernet, or if you are not using a sing le-port or mu lti-port Eth ernet po wer supply, you mus t purc hase a lo cal p ower s upply from 3Com .
Appendix C: Sett ing up the Power Supply 11 Installation Instr uctions: 1. Plug the power cable into the N etwork Ja ck. 2. Ro ute the power cab le th rough the stai n relief fix ture. 3. Secure the local power sup ply and cable to the wall. 4. Plu g the L ocal Power Supply into the power source.
Installation Guide 12 Appendix D: Setting up the Network Cabling at Your Site The ne twork c abling at you r site (f rom t he wir ing c loset to the wa ll or cubicl e opening) ma y already b e in stalled. If it is not , install the cabling following these ge neral guideline s .
Appendix E: Troublesh ooting the NJ90 13 Appendix E: Troubleshooting the NJ90 If you encount er prob lems wi th the NJ90: 1. Verify the NJ90 is receiving pow er by viewing the Power LED (it should b e lit).
Installation Guide 14 Appendix F: Contacting Technical Support 3Com provides easy access to technical support i nformation through a vari ety of services. This sect ion describes these services. Information contained in this section i s correct at t ime of public a- tion.
Appendix F: Contacti ng Technical Support 15 Support from Your Network Supplier If you require add itional as sistan ce, cons ult your network sup plier.
Installation Guide 16.
17 The 3Com Corpora tion Limited Warra nty and the Other Services describe d in this docu ment su pe rsede any such information that may be contain ed with in your product user docum entatio n. This war ranty a ppli es to c usto mers located in the Unite d States, Aus- tralia, Canada (except Quebec), Ireland, New Zealan d, U.
Installation Guide 18 3Com ma kes no wa rranty or representati on that its s oftware pro d- ucts will meet Customer’s requiremen ts or work in combination with any hardware or softwa re products pro.
LIMITED WA RRANTY 19 WARRANTIES EXCLUSIVE, WARR ANTY DISCLAIMER: TO THE FU LL EXTENT ALLOWED B Y LAW, THE FOREGOING WARR ANTIES AND REM- EDIES ARE EXCLUSIVE AND ARE IN LIEU OF ALL OT HE R WARR ANTIE S.
Installation Guide 20 or the l imitation of liabili ty for deat h or per sonal injury , so the abov e limita tion s and excl usions ma y be limited in their applicat ion to you. Whe n the impli ed warran ti es are not allowed to be excluded in their entir ety, they will be limited to the d uration of the ap plicabl e writt en warra nty.
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3Com Corporation 5500 Great America Parkway, P.O. Box 58 145, Santa C lara, CA 950 52-8145 U.S.A. www.3com.com 150000038600A R01.
An important point after buying a device 3Com NJ90 (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 NJ90 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 NJ90 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, 3Com NJ90 you will learn all the available features of the product, as well as information on its operation. The information that you get 3Com NJ90 will certainly help you make a decision on the purchase.
If you already are a holder of 3Com NJ90, 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 NJ90.
However, one of the most important roles played by the user manual is to help in solving problems with 3Com NJ90. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device 3Com NJ90 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
