Nortel Networks 8005DC - Manual (Page 87)

Connecting a modem to the switch 87
If you need remote dial-in access to the CLI, you can connect a modem to
the CPU module using a serial cable.
Prerequisites
• The Metro Ethernet Routing Switch 8600 supports the AT or Hayes
compatible modem.
• You need a DTE-to-DCE cable (straight or transmit cable).
Because the modem port expects to receive Data Set Ready (DSR) and
Clear To Send (CTS) signals before transmitting, these control lines
are required in the cables.
Procedure steps
Step Action
1 Turn on and configure the modem, using the parameters in
"Procedure job aid: Modem settings" (page 87) .
See the modem documentation for instructions.
2 Insert the 9-pin receptacle end of the serial cable into the modem
connector on the CPU module.
3 Insert the 25-pin plug connector at the other end of the serial cable
into the RS-232 data communications port of the modem.
—End—
Procedure job aid: Modem settings
Use the following table to configure the modem.
Modem settings
Setting Value
Clear to send (CTS) signal On
Data terminal ready (DTR) signal The modem only connects if the DTR signal is
present. If the DTR signal is not present, the
modem disconnects.
Data carrier detect (DCD) or
received line signal detection
(RLSD) On while the carrier is present. The switch
uses DCD to detect modem connect and
disconnect.
Data set ready (DSR) signal On
Ready to send (RTS) signal Ignored
Nortel Metro Ethernet Routing Switch 8600
Installation — Modules
NN46220-306 02.02 Standard
4.2 7 July 2008
Copyright © 2005-2007, Nortel Networks
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