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E Connecting to a Cisco Router
94
MultiModemZBA-V-V92 User Guide
To Set the Parity of the Callback Security Messages
The parity of the modem’s password prompt and messages must match the parity of the computer to
which the modem is connected.
1. The default parity setting for your modem is no parity (AT#CBP0). To change the modem’s
prompt messages to use even parity, type AT#CBP2 and press ENTER. For odd parity, type
AT#CBP1 and press E
NTER.
2. To store the new parity value, type AT&W and press ENTER.
To Assign Callback Passwords
1. To store a callback password for the first callback memory location, type AT#CBN0=
xxxxxxxx
,
where
xxxxxxxx
is the first password, and press ENTER. The password must be unique, must be
six to ten characters in length, and must not contain a + or - character.
2. To store a callback password for the second callback memory location, type
AT#CBN1=
xxxxxxxx
, where
xxxxxxxx
is the second password, and press ENTER. Note that the
memory location number in the command is incremented by one.
3. Repeat as many times as necessary, up to memory location 29, until all passwords have been
entered.
4. To review your entries, type AT&V and press ENTER.
5. To set the modem for direct connect mode, type AT%H1 and press ENTER.
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.
Step 3: Console Port Final Setup
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.