3Com Router 3012 Installation Manual

3Com Router 3012 Installation Manual Manual pdf 25 page image

Connecting the Router to the WAN 25To connect the Ethernet cable:1 Turn off power to the router.2 Select the Ethernet cable.When connecting the router with a PC or a router, use the crossover networkcable.When connecting the router to a hub or a LAN switch, use the straight-throughnetwork cable.3 Connect one end of the Ethernet cable to the appropriate Ethernet module on therouter.4 Connect the other end of the Ethernet cable to the Ethernet port of the networkdevice.5 Verify the connection by checking that the 100M ETH LED on the top of the routeris on.Connecting the Routerto the WANThe Router 3000 series routers provide the following WAN ports:■ AUX port (all models)■ Mutiprotocol synchronous/asynchronous serial port (Router 3012, Router3013, Router 3015)■ ISDN S/T port (Router 3013)■ ISDN U port (Router 3015)■ CT1/PRI port (Router 3016)■ E1/CE1/PRI port (Router 3018)See Chapter A for illustrations and pinout details of all WAN port cables.Connecting the AUXPort to the ModemThe auxiliary (AUX) port is an EIA/TIA-232-compliant synchronous/asynchronousserial port that is used for remote configuration or dial-up backup. To connect therouter to a remote device, a local modem must be connected to a remote modemthrough PSTN. For the connection method, see Chapter 3. For the AUX portspecifications of each router, see Chapter 1.If the console port fails, the AUX port can also serve as a console port.To connect the AUX cable:1 Turn off power to the router.2 Plug the RJ-45 connector of the AUX cable into the AUX port of the router.3 Connect the DB-25 or DB-9 adapter of the AUX cable to the serial port of theanalog modem.For pinout details of the AUX cable, see Appendix A.Connecting the SerialPort to a CSU/DSUThe serial port is usually used to connect the router to DSU/CSU. For the serial portspecifications of each router, see Chapter 1.CAUTION: Plugging and unplugging the connectors of the serial port online candamage the router or the remote device.