D-Link DFE-908X - Manual

v Trademark s 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 ...

Dual-Speed Stackable Hubs User’s Guide About this Guide vii T ABLE OF C ONTENTS 0 A BOUT THIS G UIDE .......................................................... IX Conventions.......................................................................................... ix Overview of the User’s Guide ......

Dual-Speed Stackable Hubs User’s Guide About this Guide ix A BOUT THIS G UIDE This guide discusses how to install and use the DFE-908 series stackabledual-speed Fast Ethernet/Ethernet Hubs. Conventions References in this manual to the DFE-908 and DFE-908x hubs are fre-quently written simply as “ hub...

Dual-Speed Stackable Hubs User’s Guide Introduction 1 1 1 I NTRODUCTION This chapter introduces the DFE-908 series stackable dual-speed FastEthernet/Ethernet Hubs, as well as giving some background informationabout the technology the hubs use. Product Description The D-Link DFE-908 series stackable ...

Introduction 2 Class II Fast Ethernet repeater, allowing it to be linked to another Class IIFast Ethernet stack in the same collision domain. On the DFE-908, the 10Mbps and 100Mbps segments are separate and donot intercommunicate. The DFE-908x contains a built-in switch, making itpossible to transpa...

Dual-Speed Stackable Hubs User’s Guide Introduction 5 100BASE-TX Technology Overview 100Mbps Fast Ethernet Introduction Computers today have become increasingly powerful, with the capability toaccommodate very sophisticated uses such as multimedia applications,video-conferencing, and CAD/CAM. To uti...

Introduction 6 Topology A Fast Ethernet workgroup is configured in a star topology and is builtaround a maximum of two repeaters. Each workgroup forms a separateLAN (also known as a segment or collision domain), and these workgroupscan be easily interconnected through switches, bridges, or routers t...

Dual-Speed Stackable Hubs User’s Guide Unpacking and Setup 7 Hub Types Unlike 10BASE-T hubs, which are all functionally identical, Fast Ethernethubs are divided into two distinct types: Class I and Class II. A Class I hubrepeats all incoming signals on one port to the other ports by first translat-i...

Unpacking and Setup 8 Unpacking Open the shipping carton of your hub and carefully unpack the contents.The carton should contain the following items: ♦ One dual-speed stackable hub ♦ One AC power cord, suitable for your area’s electrical power con-nections ♦ One daisy-chain cable ♦ Four rubber feet ...

Unpacking and Setup 10 Rear Panel ♦ Daisy-Chain IN Port When cascading a set of D-Link’s stackable dual-speed hubs, this portshould be connected to the Daisy-Chain OUT port of the previous hubin the stack (usually placed immediately above it). A cascade of fivehubs can be created in this way. The fi...

Dual-Speed Stackable Hubs User’s Guide Unpacking and Setup 11 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,Specifica...

Understanding Indicators 12 3 3 U NDERSTANDING I NDICATORS Before connecting network devices to the hub, take a few minutes to lookover 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)

Dual-Speed Stackable Hubs User’s Guide Understanding Indicators 13 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 10MbpsEthernet or 100Mbps Fast Ethernet segments...

Understanding Indicators 14 ♦ Receive (Rx) (blinking green) When information is received on a port, its indicator will blink offbriefly. Upon reception, the data will be transmitted to all other con-nected ports. ♦ Auto-partition (Auto-part) (steady amber) The indicator of a port lights amber when t...

Dual-Speed Stackable Hubs User’s Guide Making Connections 17 4 4 M AKING C ONNECTIONS This chapter discusses how to make connections to the hub’s twisted-pairports, cascading hubs to create a stack, and linking with other hubs (or hubstacks). Hub Cascading/Building a Stack You can stack up to five h...

Making Connections 18 Hubs should not be added to the stack or removed from the stack while thepower is on to any hub in the stack. Always turn off power to the entirestack before adding or removing hubs. Connectivity Rules Ethernet (10Mbps) networks need to respect the following connectivityrules:

Dual-Speed Stackable Hubs User’s Guide Making Connections 19 ♦ The maximum length of a twisted-pair cable segment is 100 meters.Cabling should be Category 3 or better. ♦ Between any two end-stations in a collision domain, there may be upto five cable segments and four intermediate repeaters (hubs, h...

Dual-Speed Stackable Hubs User’s Guide Cables and Connectors 23 A 5 C ABLES AND C ONNECTORS 100BASE-TX Ethernet Cable andConnectors ♦ Cable characteristics: 0.4 to 0.6 mm (22 to 26 AWG) 4-pair (onlytwo pairs or four wires are used for 100BASE-TX); Category 5 un-shielded twisted-pair or EIA/TIA-568 c...

Cables and Connectors 24 Contact MDI-X Signal MDI Signal 1 RD+ (receive) TD+ (transmit) 2 RD- (receive) TD- (transmit) 3 TD+ (transmit) RD+ (receive) 4 Not used Not used 5 Not used Not used 6 TD- (transmit) RD- (receive) 7 Not used Not used 8 Not used Not used Crossover Cables When cascading or conn...

Specifications 26 B 6 S PECIFICATIONS 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; Fast Ethernet: 100 Mbps Number o...

Specifications 27 Daisy-Chain Port: MiniSCSI-type connector × 2 Daisy-Chain Cable: SCSI-type cable (supplied) LED Indicators Hub Status: Power, 10Mbps collision, 100Mbps collision, 10Mbps utili- zation, 100Mbps utilization Port Status (per port): Link/Receive/Auto Partition, Speed (10/100Mbps) Envir...

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