Nortel Networks 70 Series manual Chapter Introduction

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Chapter 1

Introduction

This chapter gives you an overview of the three BayStack 70 Series 10/100 Ethernet Switches. The chapter describes the front and rear panels of each switch and explains in detail the components on each of the panels. The chapter lists the key features of the switches.

BayStack 70 Series 10/100 Ethernet Switches Overview

The BayStack 70-8T, 70-16T, and 70-24T 10/100 Ethernet switches are autosensing 10/100 Mb/s switches. The BayStack 70-8T 10/100 Ethernet Switch and BayStack 70-16T 10/100 Ethernet Switch are intended for use on desktops or other level surfaces. The BayStack 70-24T 10/100 Ethernet Switch can be used either as a desktop switch or as a segment switch in a wiring closet environment, mounted in a standard 19-inch equipment rack.

All ports on a BayStack 70 Series 10/100 Ethernet Switches can autosense their transmission speed to match the best speeds of the connected stations. BayStack 70 Series 10/100 Ethernet Switches ports operate at speeds up to 100 Mb/s. Each port can autonegotiate with the connected device to operate in full-duplex mode. If the connected device is operating at half-duplex mode only, or does not have the capability to participate in the autonegotiation process, the port will default to half-duplex mode.

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Contents Installation and Reference for Copyright 1999 Nortel Networks Iii Statement of Conditions Restricted Rights LegendNortel Networks NA Inc. Software License Agreement 206375-A Contents Chapter Troubleshooting Figures 206375-A Tables Xii Purpose PrefaceHard-Copy Technical Manuals AudienceTechnical Solutions Center Telephone Number How to Get HelpPage Chapter Introduction BayStack 70 Series 10/100 Ethernet Switches OverviewFront Panel Physical DescriptionFront Panel of the BayStack 70-8T 10/100 Ethernet Switch RJ-45 10BASE-T/100BASE-TX Ethernet Ports LEDs Type Label Color Activity Description Description of Switch and Port Status LEDsRear Panel of the BayStack 70-24T 10/100 Ethernet Switch DC Power Adapter Model MAC Addresses in Information Table FeaturesMAC Address Quantities Model Buffer Size Buffer SizesModel External Power Adapter External Power AdaptersPage Benefits of Using Switching Technology Chapter Network ConfigurationTypes of Ethernet Switches Before Desktop SwitchingSegment Switching Before After Extending a Network Bridging 10 Mb/s Networks to 100 Mb/s Networks Bridging from 10BASE-T to 100BASE-TX NetworksPower Workgroup Connections Power WorkgroupsPackage Contents Chapter InstallationOperating Environment Power SpecificationsSet the switch on a desktop or any other flat surface Installing the SwitchAttach any additional devices to the ports in your switch Installing the Switch in a Rack Connecting Devices to the SwitchConnecting Power Verifying Installation BayStack 70-24T 10/100 Ethernet Switch LED Display Checking the Diagnostic DisplaysDescription of Switch and Port Status LEDs Page Using the LED Display Chapter TroubleshootingPage Table A-1 Technical Specifications Appendix a Technical SpecificationsProduct Specifications Electromagnetic Emissions Physical SpecificationsEnvironmental Specifications Electromagnetic Susceptibility Safety Agency ApprovalsPerformance Specifications Page Table B-1 RJ-45 Connector Pin Assignments Appendix B Cables and Connectors10BASE-T/100BASE-TX UTP Cable RJ-45Figure B-1. Straight-Through Twisted-Pair Cable Straight-Through and Crossover CablesNumbers IndexIndex-2