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3Com 3C16721A User Manual
Summary of 3C16721A
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Officeconnect ® fast ethernet hub 4, hub 8, hub 12 user guide (3c16723a, 3c16722a, 3c16721a) 3c16721.Book page i wednesday, july 7, 1999 3:05 pm.
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3com corporation ■ 5400 bayfront plaza ■ santa clara, california ■ 95052-8145 copyright © 1999, 3com technologies. 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)...
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3 introduction 5 creating your network 6 fast ethernet hub 4 and hub 8—front 6 fast ethernet hub 4 and hub 8—rear 7 fast ethernet hub 12—front 8 fast ethernet hub 12—rear 9 before you start 10 workstation connections 10 hub connections 10 stacking the units together 11 the rubber feet 11 the stackin...
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4 3c 16 72 1 .Bo ok p age 4 we d n es d ay, j u ly 7, 1 9 9 9 3: 0 5 p m.
Page 5: Ntroduction
5 i ntroduction welcome to the world of networking with 3com ® . In the modern business environment, communication and sharing information is crucial. Computer networks have proved to be one of the fastest modes of communication but, until recently, only large businesses could afford the networking ...
Page 6: Reating
6 c reating y our n etwork fast ethernet hub 4 and hub 8—front 1 2 3 4 5 6 7 8 1% 2% 3% 6% 12% 25% 50% 80% port status network utilization green = ok, yellow = partitioned alert officeconnect fast ethernet hub 8 power collision activity alert led orange alerts you to excessive network use or a parti...
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7 fast ethernet hub 4 and hub 8—rear power adapter socket only use the power adapter that is supplied with this officeconnect hub. Do not use any other adapter. Uplink/normal switch affects the operation of the highest numbered port (port 4 on hub 4 and port 8 on hub 8). For connecting the port to a...
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8 fast ethernet hub 12—front 7 1 8 2 9 3 10 4 11 5 12 6 1% 2% 3% 6% 12% 25% 50% 80% port status network utilization officeconnect fast ethernet hub 12 alert power collision green = ok, yellow = partitioned alert led orange alerts you to excessive network use or a partitioned 100base-tx port. Power l...
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9 fast ethernet hub 12—rear 12 6x 7x 1x power power adapter socket only use the power adapter that is supplied with this officeconnect hub. Do not use any other adapter. Uplink/normal switch affects the operation of the highest numbered port (port 12). For connecting the port to a workstation, set t...
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10 before you start your officeconnect hub comes with: ■ one power adapter for use with the officeconnect hub ■ a product registration card for you to fill out and return ■ four rubber feet ■ a stacking clip ■ two unit labels and eight cable ties. ■ an officeconnect network assistant cd-rom. The ext...
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11 stacking the units together the rubber feet the four self-adhesive rubber feet prevent your hub from moving around on your desk. Only stick the feet to the marked areas at each corner of the underside of your hub if you intend to place the unit directly on top of the desk. Do not fix the feet if ...
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12 positioning your officeconnect hub when installing your officeconnect hub, ensure: ■ it is out of direct sunlight and away from sources of heat. ■ cabling is away from power lines, fluorescent lighting fixtures, and sources of electrical noise such as radios, transmitters and broadband amplifiers...
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13 connecting workstations and other equipment to your hub warning: please read the ‘important safety information’ section before you start. Warnhinweis: bitte lesen sie den abschnitt ‘wichtige sicherheitsinformationen’ sorgfältig durch, bevor sie das gerät einschalten. Avertissement: veuillez lire ...
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14 connecting 100base-tx hubs you can connect two officeconnect hubs together, as seen in figure 4, with 100base-tx in a number of ways, but for simplicity we recommend the following method: 1 connect the highest-number port (port 4 on hub 4, port 8 on hub 8, port 12 on hub 12) of the lower hub to a...
Page 15: Roblem
15 p roblem s olving the officeconnect hub has been designed to aid you when detecting and solving possible problems with your network. These problems are rarely serious; the cause is usually a disconnected or damaged cable, or incorrect configuration. If this section does not solve your problem, co...
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16 port status led not lit for a port that has a connection. There is a problem with this particular connection. Check that the equipment connected to the hub is powered on, operating correctly, and contains a 100base-tx connection. The hub can only be directly connected to equipment that can provid...
Page 17: Etworking
17 n etworking t erminology a network is a collection of workstations (for example, ibm-compatible pcs) and other equipment (for example, printers), connected for the purpose of exchanging information or sharing resources. Networks vary in size, some are within a single room, others span continents....
Page 18: Imensions
18 d imensions and s tandards dimensions and operating conditions officeconnect fast ethernet hub 4 officeconnect fast ethernet hub 8 officeconnect fast ethernet hub 12 500g (1.1lb) 225mm (9in.) 0 to 40°c (32 to 105°f) operating temperature 4 va 14 bthu/hr power 0 to 90% (non-condensing) humidity 35...
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19 standards functional: iso 8802/3 ieee 802.3 safety: ul 1950, en 60950 csa 22.2 #950 iec 950 emc: en 55022 class b † en 50082-1 fcc part 15 class b † * ices-003 class b vcci class b † cns 13438 class a environmental: en 60068 (iec 68) †category 5 screened cables must be used to ensure compliance w...
Page 20: Nvironmental
20 e nvironmental s tatements it is the policy of 3com corporation to be environmentally-friendly in all operations. To uphold our policy, we are committed to: ■ establishing environmental performance standards that comply with national legislation and regulations. ■ conserving energy, materials and...
Page 21: Mportant
21 i mportant s afety i nformation warning: warnings contain directions that you must follow for your personal safety. Follow all directions carefully. You must read the following safety information carefully before you install or remove the unit: ■ exceptional care must be taken during installation...
Page 22: Ichtige
22 w ichtige s icherheitshinweise warnhinweis: warnhinweise enthalten anweisungen, die sie zu ihrer eigenen sicherheit befolgen müssen. Alle anweisungen sind sorgfältig zu befolgen. Sie müssen die folgenden sicherheitsinformationen sorgfältig durchlesen, bevor sie das geräts installieren oder ausbau...
Page 23: Onsignes
23 c onsignes importantes de sÉcuritÉ avertissement: les avertissements présentent des consignes que vous devez respecter pour garantir votre sécurité personnelle. Vous devez respecter attentivement toutes les consignes. Nous vous demandons de lire attentivement les consignes suivantes de sécurité a...
Page 24: Echnical
24 t echnical s upport 3com provides easy access to technical support information through a variety of services. This section describes these services. Information contained in this section is correct at time of publication. For the most recent information, 3com recommends that you access the 3com c...
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25 support from your network supplier if you require additional assistance, contact your network supplier. Many suppliers are authorized 3com service partners who are qualified to provide a variety of services, including network planning, installation, hardware maintenance, application training, and...
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26 here is a list of worldwide technical telephone support numbers: country telephone number country telephone number asia, pacific rim australia hong kong india indonesia japan malaysia new zealand pakistan philippines 1 800 678 515 800 933 486 +61 2 9937 5085 001 800 61 009 0031 61 6439 1800 801 7...
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27 latin america argentina brazil chile colombia at&t +800 666 5065 0800 13 3266 1230 020 0645 98012 2127 mexico peru puerto rico venezuela 01 800 care (01 800 2273) at&t +800 666 5065 800 666 5065 at&t +800 666 5065 north america 1 800 876-3266 country telephone number country telephone number 3c16...
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28 returning products for repair before you send a product directly to 3com for repair, you must first obtain a return material authorization (rma) number. Products sent to 3com without authorization numbers will be returned to the sender unopened, at the sender’s expense. To obtain an authorization...
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29 3com corporation l imited w arranty 3com officeconnect fast ethernet hub 4, hub 8, hub 12 the duration of the warranty for the officeconnect fast ethernet hub 4 (3c16723a), hub 8 (3c16722a) and hub 12 (3c16721a) is lifetime, including the power adapter. Advance hardware exchange is available duri...
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30 pre-authorized by 3com with a return material authorization (rma) number marked on the outside of the package, and sent prepaid and packaged appropriately for safe shipment, and it is recommended that they be insured or sent by a method that provides for tracking of the package. The repaired or r...
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31 d isclaimer some countries, states, or provinces do not allow the exclusion or limitation of implied warranties or the limitation of incidental or consequential damages for certain products supplied to consumers, or the limitation of liability for personal injury, so the above limitations and exc...
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32 e lectromagnetic c ompatibility fcc s tatement this equipment has been tested and found to comply with the limits for a class b digital device, pursuant to part 15 of the fcc rules, and the canadian department of communications equipment standards entitled, “digital apparatus,” ices-003. These li...
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33 3c 16 72 1 .Bo ok p age 33 w edn es d ay , ju ly 7 , 19 99 3 :0 5 p m.
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34 3c 16 72 1 .Bo ok p age 34 w edn es d ay , ju ly 7 , 19 99 3 :0 5 p m.
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35 w a ll m ount ing scr e w hol e gui de fast et her n et hub 4 and 8 150m m ( 5 .9 in .) w a ll m ount ing scr e w hol e gui de fast et her n et hub 12 142m m ( 5 .6 in .) 3c 16 72 1 .Bo ok p age 35 w edn es d ay , ju ly 7 , 19 99 3 :0 5 p m.
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P a rt no . Dua 1 6 7 2 -1 a a a 0 3 pu bl is hed j u n e 19 99 36 3c 16 72 1 .Bo ok p age 36 w edn es d ay , ju ly 7 , 19 99 3 :0 5 p m.