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3Com Hub User Manual

3com officeconnect dual speed hub user guide
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OfficeConnect
Dual Speed Hub 8
User Guide (3C16750A)

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Summary of Contents for 3Com Hub

  • Page 1 ® OfficeConnect Dual Speed Hub 8 User Guide (3C16750A)
  • Page 2 3Com Technologies. 3Com Technologies reserves the right to revise this documentation and to make changes in content from time to time without obligation on the part of 3Com Technologies to provide notification of such revision or change.

  • Page 3: Table Of Contents

    The Rubber Feet 9 The Stacking Clip 9 Positioning Your Hub 10 Securing Your Hub 10 Connecting Workstations and Other Equipment to Your Hub 11 Connecting Another OfficeConnect Hub 11 Fast Ethernet (100Mbps) Configuration Rules 11 Ethernet (10Mbps) Configuration Rules 12...

  • Page 5: Introduction

    Ethernet (10Mbps) and Fast Ethernet (100Mbps) workstations and other devices (a Class II hub can be connected to another Fast Ethernet hub, a Class I hub cannot). When referring to the OfficeConnect Dual Speed Hub 8, this guide uses the term ‘Hub’.

  • Page 6: Creating Your Network

    ETWORK Dual Speed Hub 8—Front Alert LED Power LED orange green Off when the Hub is operating Indicates that correctly. Lit for a short period of the power time after power on, for self test. supply to the If the LED is continuously lit, there Hub is may be a problem.

  • Page 7: Dual Speed Hub 8-Rear

    5V DC 4A MAX Power Adapter socket Only use the power adapter that is supplied with this OfficeConnect Dual Speed Hub 8. Do not use any other adapter. 10/100BASE-TX Uplink/Normal Uplink/Normal switch Eight 10/100BASE-TX ports Affects the operation of port 8. If...

  • Page 8: Before You Start

    The maximum length of a single cable is 100m (328ft). Refer to “Fast Ethernet (100Mbps) Configuration Rules” on page 11 for further information on cable lengths in a 100Mbps network. Hub Connections To connect other OfficeConnect units to your Hub, you need one suitable TP cable for each unit.

  • Page 9: Stacking The Units Together

    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 you are going to use the clip.

  • Page 10: Positioning Your Hub

    Securing Your Hub There are two slots on the underside of the OfficeConnect hub which can be used for wall mounting. It is recommended that you mount the hubs with the LEDs facing upwards to prevent dust entering the cooling vents.

  • Page 11: Connecting Workstations And Other Equipment To Your Hub

    100Mbps. Fast Ethernet (100Mbps) Configuration Rules The Dual Speed Hub 8 is a Class II hub. You can connect directly two Class II Fast Ethernet hubs (Class I Fast Ethernet hubs cannot be connected directly to other Fast Ethernet hubs).

  • Page 12: Ethernet (10Mbps) Configuration Rules

    3Com recommends that the cable (B) between the Fast Ethernet hubs is no longer than 5m (16.4ft). This allows the maximum hub-to-workstation cable length (A or C) of 100m (328ft) to be used, as shown in Figure 3. Figure 3...

  • Page 13: Making The Connection To Another Hub

    Using a straight-through cable, connect the Uplink/Normal port of the Dual Speed Hub 8 to any of the ports on the other hub (as shown in Figure 5). If using an Uplink/Normal port on the other hub, set its Uplink/Normal switch to Normal (out).

  • Page 14: Problem Solving

    ROBLEM 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, contact your supplier for information on what to do next.
  • Page 15 Check your connections; follow the information given in the “Connecting Another OfficeConnect Hub” section on page 11. It is likely that an Uplink/Normal switch is incorrectly set. Port Status LED not lit for a port that has a connection.

  • Page 16: Networking Terminology

    100Mbps. The OfficeConnect hub uses RJ-45 type connectors for connecting your TP network. A Network Loop occurs when two pieces of network equipment are connected by more than one path. Your hub detects this and partitions (isolates) one of its ports to break the loop.

  • Page 17: Dimensions And Standards

    IMENSIONS AND TANDARDS Dimensions and Operating Conditions 33 VA 58 BThU/hr power requirement 0 to 40°C (32 to 105°F) operating temperature 0 to 90% (non-condensing) humidity 930g (2.1 lb) Standards Functional: 228mm (9.12in.) Safety: 54mm (2.1in.) 185mm (7.3in.) EMC: Environmental: †...

  • Page 18: Environmental Statements

    NVIRONMENTAL 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 natural resources in all operations.

  • Page 19: Important Safety Information

    SELV conditions. NFORMATION There are no user-replaceable fuses or user-serviceable parts inside the hub. If you have a physical problem with the unit that cannot be solved with problem solving actions in this guide, contact your supplier.

  • Page 20: Wichtige Sicherheitshinweise

    Es sind keine von dem Benutzer zu ersetzende oder zu wartende Teile in dem Gerät vorhanden. Wenn Sie ein Problem mit dem Switch haben, das nicht mittels der Fehleranalyse in dieser Anleitung behoben werden kann, setzen Sie sich mit Ihrem Lieferanten in Verbindung.

  • Page 21: Consignes Importantes De Sécurité

    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 avant d’installer ou de retirer l’appareil: Faites très attention lors de l'installation et de la dépose du groupe.

  • Page 22: Technical Support

    3Com Corporation World Wide Web site. Online Technical Services 3Com offers worldwide product support 24 hours a day, 7 days a week, through the following online systems: World Wide Web site. 3Com Knowledgebase Web Services.

  • Page 23: Support From Your Network Supplier

    If you are unable to contact your network supplier, see the following section on how to contact 3Com. Support from 3Com If you are unable to obtain assistance from the 3Com online technical resources or from your network supplier, 3Com offers technical telephone support services. To find out more...
  • Page 24 Here is a list of worldwide technical telephone support num- bers: Country Telephone Number Asia, Pacific Rim Australia 1 800 678 515 Hong Kong 800 933 486 India +61 2 9937 5085 Indonesia 001 800 61 009 Japan 0031 61 6439 Malaysia 1800 801 777 New Zealand...
  • Page 25 Country Telephone Number Latin America Argentina AT&T +800 666 5065 Brazil 0800 13 3266 Chile 1230 020 0645 Colombia 98012 2127 North America 1 800 876-3266 Country Telephone Number Mexico 01 800 CARE (01 800 Peru 2273) Puerto Rico AT&T +800 666 5065 Venezuela 800 666 5065 AT&T +800 666 5065...

  • Page 26: Returning Products For Repair

    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.

  • Page 27: 3Com Corporation Limited Warranty

    January 1, 2000, and Customer notifies 3Com before the later of April 1, 2000, or ninety (90) days after purchase of the product from 3Com or its authorized reseller,...
  • Page 28 (DOA) and a replacement shall be provided by advance replacement. The replacement product will normally be shipped not later than three (3) business days after 3Com’s verification of the DOA product, but may be delayed due to export or import procedures. When an advance replacement is provided and...
  • Page 29 This Limited Warranty shall be governed by the laws of the State of California, U.S.A. excluding its conflicts of laws principles and excluding the United Nations Convention on Contracts for the International Sale of Goods. 3Com Corporation 5400 Bayfront Plaza Santa Clara, CA 95054...

  • Page 30: Electromagnetic Compatibility

    LECTROMAGNETIC 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,”...
  • Page 31 Wall mounting screw hole guide 142mm (5.6in.)
  • Page 32 Part No. DUA 1675-0AAA03 Published June 1999...

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