Related Manuals for D-Link DFE-908x
Summary of Contents for D-Link DFE-908x
- Page 1 DFE-908x DFE-908 Ethernet/Fast Ethernet Dual-Speed Stackable Hubs User’s Guide Rev. 01 (December, 1997) 6DFE908...01 Printed In Taiwan RECYCLABLE...
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Page 2: Wichtige Sicherheitshinweise
Wichtige Sicherheitshinweise Bitte lesen Sie sich diese Hinweise sorgfältig durch. Heben Sie diese Anleitung für den spätern Gebrauch auf. Vor jedem Reinigen ist das Gerät vom Stromnetz zu trennen. Vervenden Sie keine Flüssig- oder Aerosolreiniger. Am besten dient ein angefeuchtetes Tuch zur Reinigung. Um eine Beschädigung des Gerätes zu vermeiden sollten Sie nur Zubehörteile verwenden, die vom Hersteller zugelassen sind. -
Page 3: Limitation Of Liability
RANGE OF THE INTENDED USE, OR BY ACCIDENT, FIRE, LIGHTNING OR OTHER HAZARD. LIMITATION OF LIABILITY IN NO EVENT WILL D-LINK BE LIABLE FOR ANY DAMAGES, INCLUDING LOSS OF DATA, LOSS OF PROFITS, COST OF COVER OR OTHER INCIDENTAL, CONSEQUENTIAL OR INDIRECT... -
Page 4: Limited Warranty
The one-year period of warranty on complete products applies on condition that the product's Registration Card is filled out and returned to a D-Link office within ninety (90) days of purchase. A list of D-Link offices is provided at the back of this manual, together with a copy of the Registration Card. Failing such timely registration of purchase, the warranty period shall be limited to 90 days. -
Page 5: Copyright Statement
Trademark Copyright 1997 D-Link Corporation. Contents subject to change without prior notice. D-Link is a registered trademark of D-Link Corporation/D-Link Systems, Inc. All other trademarks belong to their respective proprietors. Copyright Statement No part of this publication may be reproduced in any form or by any means or used to make any derivative such as translation, transformation, or adap- tation without permission from D-Link Corporation/D-Link Systems Inc., as... -
Page 6: Fcc Warning
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Page 9: Table Of Contents
ABLE OF BOUT THIS UIDE Conventions...ix Overview of the User’s Guide ...ix ... 1 NTRODUCTION Product Description ...1 Product Features...2 Dual-speed Fast Ethernet/Ethernet Hub Technology Overview...3 100BASE-TX Technology Overview...5 100Mbps Fast Ethernet Introduction... 5 Cables and Connectors ... 5 Topology... 6 Network Diameter ... - Page 10 Hub State Indicators...12 Port State Indicators...13 Port Speed Indicators ...14 Switch Indicator (DFE-908x Only) ...14 AKING ONNECTIONS Hub Cascading/Building a Stack ...17 Connectivity Rules...18 Hub to End-Station Connection ...19 Hub-to-Hub Uplink...21 ABLES AND ONNECTORS 100BASE-TX Ethernet Cable and Connectors...23 Crossover Cables...24 ...
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Page 11: About This Guide
Fast Ethernet/Ethernet Hubs. Conventions References in this manual to the DFE-908 and DFE-908x hubs are fre- quently written simply as “ hub” or “ hubs” where the text applies to all models. Model numbers are normally used only to differentiate between the two where necessary. - Page 12 Chapter 4, Making Connections. Provides information on connect- ing to the hub’s twisted-pair, stacking hubs, and linking with other 100BASE-TX hubs. Appendix A, Cables and Connectors. Provides specifications on the cables and connectors used with the hubs. Appendix B, Specifications. Lists the hubs’ specifications. About this Guide...
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Page 13: Introduction
Ethernet/Ethernet Hubs, as well as giving some background information about the technology the hubs use. Product Description The D-Link DFE-908 series stackable dual-speed Fast Ethernet/Ethernet Hubs are designed to allow easy migration and integration between 10Mbps Ethernet and 100Mbps Fast Ethernet, while providing flexibility in cable connections. -
Page 14: Product Features
Fast Ethernet stack in the same collision domain. On the DFE-908, the 10Mbps and 100Mbps segments are separate and do not intercommunicate. The DFE-908x contains a built-in switch, making it possible to transparently bridge between the 10 Mbps and 100 Mbps seg- ments. -
Page 15: Dual-Speed Fast Ethernet/Ethernet Hub Technology Overview
LED indicators for power, collisions, link, network activity, switch capability (DFE-908x only), partitioning status, operating speed (10 or 100 Mbps) and network utilization. Auto-partition protection. Data collision detection and handling. Preamble regeneration, signal retiming. Two proprietary daisy-chain ports for cascading up to five hubs to form one logical hub. - Page 16 100Mbps to all other ports operating at the same speed. 100Mbps 100Mbps Ethernet Ethernet Station Station If there is a DFE-908x hub present in the stack, its built-in switch serves as a bridge between the two independent segments. 10Mbps Repeater 100Mbps Repeater NWay Detection RJ-45 Ports 10Mbps...
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Page 17: 100Base-Tx Technology Overview
Dual-Speed Stackable Hubs User’s Guide 100BASE-TX Technology Overview 100Mbps Fast Ethernet Introduction Computers today have become increasingly powerful, with the capability to accommodate very sophisticated uses such as multimedia applications, video-conferencing, and CAD/CAM. To utilize these technologically ad- vanced applications more efficiently, there is also a growing demand for faster networks that can handle heavy network traffic. -
Page 18: Topology
Topology A Fast Ethernet workgroup is configured in a star topology and is built around a maximum of two repeaters. Each workgroup forms a separate LAN (also known as a segment or collision domain), and these workgroups can be easily interconnected through switches, bridges, or routers to form one LAN large enough to encompass a high-rise building or campus envi- ronment. -
Page 19: Hub Types
Dual-Speed Stackable Hubs User’s Guide Hub Types Unlike 10BASE-T hubs, which are all functionally identical, Fast Ethernet hubs are divided into two distinct types: Class I and Class II. A Class I hub repeats all incoming signals on one port to the other ports by first translat- ing them to digital signals and then retranslating them back to line signals. -
Page 20: Unpacking
This User’s Guide Inspect the hub and all accompanying items. If any item is damaged or missing, report the problem immediately to your D-Link dealer. Identifying External Components This section identifies all the major external components of the hub. Both the front and rear panels are shown, followed by a description of each panel feature. - Page 21 PCs, workstations, or servers through these ports. If you need to connect to another device with MDI- X ports such as another hub or an Ethernet switch, you should use a crossover cable, or connect using the Uplink port (described below).
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Page 22: Rear Panel
Rear Panel Daisy-Chain IN Port When cascading a set of D-Link’s stackable dual-speed hubs, this port should be connected to the Daisy-Chain OUT port of the previous hub in the stack (usually placed immediately above it). A cascade of five hubs can be created in this way. -
Page 23: Installing The Hub
Installing the Hub Installation The site where you install the hub stack may greatly affect its performance. When installing, consider the following pointers: Install the hub stack in a fairly cool and dry place. See Appendix B, Specifications, for the acceptable temperature and humidity operat- ing ranges. -
Page 24: Understanding Indicators
NDERSTANDING NDICATORS Before connecting network devices to the hub, take a few minutes to look over this section and familiarize yourself with the front panel LED indica- tors of your dual-speed hub, depicted below. Hub State Indicators Power Indicator (PWR) Understanding Indicators... -
Page 25: Port State Indicators
This indicator lights green when the hub is receiving power; otherwise, it is off. Collision Indicators (Col 10M/ Col 100M) These indicators indicate data collisions on the respective 10Mbps Ethernet or 100Mbps Fast Ethernet segments connected to the hub. (If several hubs are stacked or linked together, all of them should detect and indicate the same collision, since collisions span the entire network segment.) Whenever a collision is detected, the respective COL indi-... -
Page 26: Port Speed Indicators
10BASE-T device is connected. Switch Indicator (DFE-908x Only) The DFE-908x’s Switch indicator shines a steady green when the hub’s built-in switch is functioning correctly. The indicator should shine when- ever the hub has power. - Page 27 Dual-Speed Stackable Hubs User’s Guide Understanding Indicators...
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Page 29: Making Connections
Dual-Speed Stackable Hubs User’s Guide AKING ONNECTIONS This chapter discusses how to make connections to the hub’s twisted-pair ports, cascading hubs to create a stack, and linking with other hubs (or hub stacks). Hub Cascading/Building a Stack You can stack up to five hubs using the daisy-chain ports to form one logi- cal hub. -
Page 30: Connectivity Rules
Hubs should not be added to the stack or removed from the stack while the power is on to any hub in the stack. Always turn off power to the entire stack before adding or removing hubs. Connectivity Rules Ethernet (10Mbps) networks need to respect the following connectivity rules: Making Connections... -
Page 31: Hub To End-Station Connection
The maximum length of a twisted-pair segment (that is, the distance between a port in the hub to a single-address network device such as a PC, server, or Ethernet switch) is 100 meters. Cabling and other wiring should be certified as Category 5 or shielded twisted pair (STP). - Page 32 Ethernet connection requires a Category 3 or better UTP cable. It is rec- ommended that you use Category 5 cabling for all connections, in order to make it easier to transition all stations to 100Mbps. You can connect any combination of PCs, servers, and other single-address network devices to the eight twisted-pair ports using straight-through twisted-pair cables.
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Page 33: Hub-To-Hub Uplink
Dual-Speed Stackable Hubs User’s Guide Hub-to-Hub Uplink You can link two hubs or hub stacks to each other using any of the twisted- pair ports or the Uplink port. Linking hubs using ordinary twisted-pair ports requires crossover twisted-pair cables; linking using one ordinary twisted-pair port and the Uplink port requires an ordinary straight-through twisted-pair cable. - Page 34 The following table describes different methods of linking hubs (or hub stacks): DEVICE PORT USED Normal Switch or Server (or PC) Uplink Switch or Server (or PC) A crossover cable is a straight-through twisted-pair cable in which the wires have been crossed. The figure below shows the pin assignments for...
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Page 35: Cables And Connectors
100BASE-TX Ethernet Cable and Connectors Cable characteristics: 0.4 to 0.6 mm (22 to 26 AWG) 4-pair (only two pairs or four wires are used for 100BASE-TX); Category 5 un- shielded twisted-pair or EIA/TIA-568 compliant, 100-ohm shielded twisted-pair Maximum segment length: 100 meters Maximum network diameter: 205 meters Connector: RJ-45 Cables and Connectors... -
Page 36: Crossover Cables
Crossover Cables When cascading or connecting the hub to another switch, bridge, or hub through the UTP port, a modified crossover cable is necessary. With a crossover cable, two pairs of wires are switched at one connector end. Carry out the following steps to create a customized, crossover twisted-pair cable: Leave one end of the cable as is, with the RJ-45 connector intact. - Page 37 Dual-Speed Stackable Hubs User’s Guide Cables and Connectors...
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Page 38: Specifications
General Standards: IEEE 802.3 10BASE-T Ethernet repeater IEEE 802.3u 100BASE-TX Fast Ethernet repeater (Class II) ANSI X3T9.5 Twisted-Pair Transceiver Topology: Star Protocol: CSMA/CD Network Data Transfer Rate: Ethernet: 10Mbps; Number of Ports per Hub: 8, all dual-speed (10Mbps/100Mbps) Network Cables: 10BASE-T: 2-pair UTP Cat. -
Page 39: Led Indicators
Port Status (per port): Link/Receive/Auto Partition, Speed (10/100Mbps) Environmental and Physical Power Supply: 100 to 240 VAC, 50 or 60 Hz internal universal power supply Power Consumption: DFE-908x: 10 watts max.; DFE-908: 10 watts max. Dimensions: 233mm 141mm 44mm (9.2 1.7 inches) Weight: 1.2 kg (2.6 lb) - Page 41 2180 Dunwin Drive, Unit # 6, Mississauga Ontario, L5L 5M8, Canada TEL: 1-905-828-0260 FAX: 1-905-828-5669 U.K. D-LINK (EUROPE) LTD. D-Link House, 6 Garland Road, Stanmore, London HA7 1DP U.K. TEL: 44-181-2355555 FAX: 44-181-2355500 GERMANY D-LINK (DEUTSCHLAND) GMBH I.G. Bachstrae 22, 65830 Kriftel, Germany...
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Page 43: Registration Card
3. What network protocol(s) does your organization use ? †XNS/IPX †TCP/IP †DECnet †Other_____________________________ 4. What network operating system(s) does your organization use ? †D-Link LANsmart †Novell NetWare †NetWare Lite †SCO Unix/Xenix †PC NFS †3Com 3+Open †Banyan Vines †DECnet Pathwork †Windows NT †Windows NTAS †Windows '95 †Other__________________________________________ 5.