Nortel Networks 70 Series manual Connecting Power

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Installation and Reference for the BayStack 70 Series 10/100 Ethernet Switches

You can connect to another device through any of the ports on the switch. The MDI/MDI-X button eliminates the need to use a crossover twisted pair cable when connecting similarly wired devices. You can configure port 1 on a BayStack 70 Series 10/100 Ethernet Switch to uplink or normal mode with the MDI/MDI-X button, using the following guidelines:

Set the MDI/MDI-X button to the MDI-X (Normal) position and use a standard straight-through UTP cable if the remote end of the cable is connected to an MDI wired device such as a PC, a server, or a router.

Set the MDI/MDI-X button to the MDI (Uplink) position and use a straight-through UTP cable if the remote end of the cable is connected to an MDI-X wired device such as a 10 Mb/s or 100 Mb/s hub or repeater, or for backbone connection to another switch.

By default, the UTP ports without the MDI/MDI-X button are normal (MDI-X) ports and cannot be configured for uplink (MDI) wiring. If you are using any port except port 1 to connect to another normal (MDI-X) port as on a hub or repeater, you must use a crossover twisted pair cable to connect the two ports.

For further cabling guidelines, refer to Appendix B, “Cables and Connectors.”

Connecting Power

The BayStack 70 Series 10/100 Ethernet Switch does not have a power on/off switch. When you connect the AC power cord (or DC power adapter) to a suitable AC power outlet, the switch powers up immediately.

Warning: Removal of the power cord is the only way to turn off power to this device. The power cord must always be connected in a location that can be accessed quickly and safely in case of an emergency.

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Contents Installation and Reference for Copyright 1999 Nortel Networks Iii Restricted Rights Legend Statement of ConditionsNortel Networks NA Inc. Software License Agreement 206375-A Contents Chapter Troubleshooting Figures 206375-A Tables Xii Preface PurposeAudience Hard-Copy Technical ManualsHow to Get Help Technical Solutions Center Telephone NumberPage BayStack 70 Series 10/100 Ethernet Switches Overview Chapter IntroductionPhysical Description Front PanelFront Panel of the BayStack 70-8T 10/100 Ethernet Switch RJ-45 10BASE-T/100BASE-TX Ethernet Ports LEDs Description of Switch and Port Status LEDs Type Label Color Activity DescriptionRear Panel of the BayStack 70-24T 10/100 Ethernet Switch DC Power Adapter Features MAC Address QuantitiesModel MAC Addresses in Information Table Buffer Sizes Model Buffer SizeExternal Power Adapters Model External Power AdapterPage Chapter Network Configuration Benefits of Using Switching TechnologyTypes of Ethernet Switches Desktop Switching BeforeSegment Switching Before After Extending a Network Bridging from 10BASE-T to 100BASE-TX Networks Bridging 10 Mb/s Networks to 100 Mb/s NetworksPower Workgroups Power Workgroup ConnectionsChapter Installation Package ContentsPower Specifications Operating EnvironmentInstalling the Switch Set the switch on a desktop or any other flat surfaceAttach any additional devices to the ports in your switch Connecting Devices to the Switch Installing the Switch in a RackConnecting Power Verifying Installation Checking the Diagnostic Displays BayStack 70-24T 10/100 Ethernet Switch LED DisplayDescription of Switch and Port Status LEDs Page Chapter Troubleshooting Using the LED DisplayPage Appendix a Technical Specifications Product SpecificationsTable A-1 Technical Specifications Physical Specifications Environmental SpecificationsElectromagnetic Emissions Safety Agency Approvals Performance SpecificationsElectromagnetic Susceptibility Page 10BASE-T/100BASE-TX UTP Cable Appendix B Cables and ConnectorsTable B-1 RJ-45 Connector Pin Assignments RJ-45Straight-Through and Crossover Cables Figure B-1. Straight-Through Twisted-Pair CableIndex NumbersIndex-2