4000 Router Series Layer 2 - WAN Configuration Guide

[Router-Serial0/0:0] quit

# Enable modem dial-in and dial-out on user line TTY 1.

[Router] line tty 1

[Router-line-tty1] modem enable both

Troubleshooting

Symptom

A 3G modem is in abnormal status.

Solution

• Execute the shutdown command and undo shutdown command on the cellular interface.

• If the modem is still in abnormal status, reboot the modem.