100
MINI-MODEM V.92
To Call a Modem Configured for Callback Security
1. Using a terminal program and an originating modem, dial the number of the
modem connected to the Cisco router, which we will call the “remote
modem.”
2. When the connection is established, the remote modem responds with the
following message:
Password>
3. Type a direct connection password, and press ENTER. You have three
attempts or one minute to enter a valid password.
4. If the password is valid, the message OK Connecting appears, and the modems
establish a working connection.
S
TEP
3: C
ONSOLE
P
ORT
F
INAL
S
ETUP
Send the following command string to the modem being connected to the console
port of the Cisco router: AT%R1&W0
The %R1 command sets E0, Q1, &D0, &K0, $SB9600, and %S1, and the &W0
command stores the commands to memory.
The %R1 command sets the following functions:
E0
Turns command echo off
Q1
Turns result codes off
&D0
Ignores DTR from the DTE
&K0
Selects no flow control
$SB9600
Sets the serial baud rate to 9600 bps.
%S1
Disables command mode at all serial speeds except 115200 bps.
The modem is now configured for use on the Cisco router console port.
Note that command echo and result codes have been turned off. If it becomes
necessary to send additional AT commands to the modem after it has been so
configured, there will be little feedback from the modem that it has received and
acted upon the command. Only commands such as ATI0 that request specific data
from the modem will send any data to the DTE as an indication that the modem
has accepted the command. Temporarily turning on command echo and result
codes might ease reconfiguration of the modem.
When the modem is connected to the console port, turn the modem off and then
on again. This will set the serial baud rate to 9600 bps as the $SB9600 command is
implemented.
