the router has an eia/tia-232 asynchronous serial auxiliary port (rj-45) that supports flow control. depending on the cable and the adapter used, this port will appear as a dte or dce device at the end of the cable.

    for connection to a modem, your router is provided with either an rj-45 rollover cable and an rj-45-to-db-25 male adapter (labeled modem), or with an rj-45-to-db-25 adapter cable.

    for detailed information about connecting devices to the auxiliary port, refer to the "connecting to a console terminal or modem" section on page 3-27.

    for cable and port pinouts, refer to the online document cisco modular access router cable specifications. this document is located on the documentation cd-rom that accompanied your router, and on cisco.com.