3Com 3C13755-US - Router 5642 Installation Manual

Also see for 3C13701: Installation guide Quick reference guide Installation guide Getting started guide Module guide

Contents

3Com 3C13755-US - Router 5642 Installation Manual Manual pdf 17 page image

1-Port Serial SIC 15hubs or LAN switches. A standard network cable is shipped with the Router5012.■ Crossover cable — The wire sequences of the twisted pair cable are terminatedby RJ-45 connectors that are different at either end. This type of cable canconnect terminal equipment, such as PCs and routers, to other terminalequipment. You can create this kind of cable yourself, if necessary.The 1-port 10/100 BASE-T SIC ships with the interface cables. While preparingnetwork cables, use the shielded cable first to ensure electromagneticcompatibility.To connect the Ethernet cable:1 Power off the router.2 If the Ethernet cable is a standard, straight-through cable, plug one end of thecable into the Ethernet port of the 1-port 10/100 BASE-T SIC and the other endinto the hub or LAN switch.3 Check the SLOT2 LED on the front panel of the router after you power on therouter. If the LED is on, the interface card has passed the power-on self-test(POST). If the LED is off, the POST failed and you should contact your Servicerepresentative.4 Check the status of LINK LED on the 1-port 10/100 BASE-T SIC panel. If the LED ison, the link is connected. If it is off, the link is not connected. Check the cablesand the connections.1-Port Serial SIC The main functions of the 1-Port Serial SIC are:■ Transmisson and processing of synchronous or asynchronous serial datastreams■ Operation in different modes, such as DTE/DCE, depending on the applications■ Automatic detection of the type of external cable without manualconfiguration■ Local loop and remote loopback to facilitate fault testing and locating.In different operating modes, a serial port supports different signal standards andbaud rates. The maximum transmission distance of the signals is related to thebaud rate setting. Table 13 lists the relations between cable type, baud rate settingand signal transmission distance.Table 13 Baud Rate and Transmission Distance of V.24 (EIA/TIA-232)/V.35 CableV.24 (EIA/TIA-232) V.35Baud Rate (bps)MaximumTransmissionDistance (m) Baud Rate (bps)MaximumTransmissionDistance (m)2400 60 2400 12504800 60 4800 6259600 30 9600 31219200 30 19200 15638400 20 38400 78