Connecting a Modem

After you connect a modem to your switch with the specified serial cable and connectors, and configure the serial port in PPP mode, the switch will convert the normal Distributed Computing Environment (DCE) interface to a Data Terminal Equipment (DTE) interface that is used by modems.

It then periodically sends the modem configuration string from the serial console port. This synchronizes the baud rates between the modem and the console port and configures the modem to operate with the switch's DTE interface.

To connect a modem (Figure�19):

1. Attach a DB25M-RJ45 (P/N 38210003) connector to the modem.
2. Attach the DB9M-RJ45 MDCE connector to the switch's serial console port on the front panel of the switch.

Figure�19:�Typical Modem Connection to a Switch