D-Link DFE-908X manual Dual-speed Fast Ethernet/Ethernet Hub Technology Overview

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Dual-Speed Stackable Hubs User’s Guide

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.

Uplink port allows easy linking of two Fast Ethernet or four Ethernet hub stacks to further expand your network.

Built-in power supply. Automatic voltage selection (100V to 240V, 50 or 60Hz) without fuses to change or a voltage switch to set.

Stackable to five units, or total 40-port capability.

Scaleable expansion up to two stacks, or a total of 78 ports.

Dual-speed Fast Ethernet/Ethernet Hub Technology Overview

Dual-speed Ethernet hubs have been developed to make it simpler to plan networks containing both 10Mbps Ethernet and 100Mbps Fast Ethernet technologies, especially when network hosts are being gradually migrated to new Fast Ethernet connections.

A dual-speed hub is actually two repeaters in one enclosure. The 10Mbps repeater receives Ethernet transmissions from any of its ports, and retrans- mits them to all other ports operating at 10Mbps. Similarly, the 100Mbps

Introduction

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Contents Recyclable Wichtige Sicherheitshinweise Warranties Exclusive Limited Warranty Trademarks Vcci B Warning Vii Page Table of Contents Cables and Connectors About this Guide ConventionsOverview of the User’s Guide About this Guide Product Description IntroductionProduct Features Dual-speed Fast Ethernet/Ethernet Hub Technology Overview 10Mbps Repeater 100Mbps Repeater NWay Detection RJ-45 Ports Cables and Connectors 100BASE-TX Technology Overview100Mbps Fast Ethernet Introduction Network Diameter TopologyHub Types Unpacking SetupUnpacking Identifying External ComponentsFront Panel LED Indicator Panel Twisted-Pair PortsUplink Port Daisy-Chain OUT Port AC Power Connector For the power cordRear Panel Daisy-Chain in PortInstallation Installing the HubUnderstanding Indicators Hub State IndicatorsPower Indicator PWR Link steady green Port State IndicatorsCollision Indicators Col 10M/ Col 100M 10Mbps and 100Mbps Utilization IndicatorsAuto-partition Auto-part steady amber Port Speed IndicatorsSwitch Indicator DFE-908x Only Receive Rx blinking greenPage Page Hub Cascading/Building a Stack Making ConnectionsConnectivity Rules Hub to End-Station Connection Making Connections Hub-to-Hub Uplink HUB Device Port Cable to USE Type Used 100BASE-TX Ethernet Cable and Connectors Cables ConnectorsCrossover Cables Contact MDI-X Signal MDI SignalDual-Speed Stackable Hubs User’s Guide Cables and Connectors Topology Star SpecificationsGeneral Hub-to-Hub CascadingEnvironmental and Physical LED IndicatorsPower Supply Operating Temperature -10to 55C 14-131FPage Offices Page Registration Card