16 Commissioning fundamentalsTerminal connectionConnect the serial console interface (an RS-232 port) to a PC or terminalto monitor and configure the switch. The port uses a DB-9 connectorthat operates as data terminal equipment (DTE) or data communicationequipment (DCE). The default communication protocol settings for theconsole port are:• 9600 baud• 8 data bits• 1 stop bit• No parityTo use the console port, you need the following equipment:• A terminal or teletypewriter (TTY)-compatible terminal, or a portablecomputer with a serial port and terminal-emulation software• An Underwriters Laboratories (UL)-listed straight-through or nullmodem RS-232 cable with a female DB-9 connector for the consoleport on the switch. The other end of the cable must use a connectorappropriate to the serial port on your computer or terminal. Mostcomputers or terminals use a male DB-25 connector. You can find anull modem cable with the chassis.You must shield the cable connected to the console port to comply withemissions regulations and requirements.Modem connectionYou can access the switch through a modem connection to the NortelEthernet Routing Switch 8600, 8691SF/CPU, or 8692SF/CPU modules.Nortel recommends that you use the default settings for the modem portfor most modem installations.To set up modem access, you must use a DTE-to-DCE cable (straight ortransmit cable) to connect the Nortel Ethernet Routing Switch 8600 to themodem. The following table shows the DTE-to-DCE pin assignments.Table 1DTE-to-DCE straight-through pin assignmentsSwitch ModemSignal PinnumberDCE DB-9pin numberDCE DB-25pin numberReceived data(RXD)2 2 3Transmitted data(TXD)3 3 2Nortel Ethernet Routing Switch 8600CommissioningNN46205-319 01.01 Standard30 May 2008Copyright © 2008 Nortel Networks.