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Appendix E - Connecting to a Cisco Router
Multi-Tech Systems, Inc. MT5634ZBA-Series User Guide 42
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 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.
Console Port Connections
To connect a personal computer to the console port, use the RJ-45-to-RJ-45 roll-over cable and either the
RJ-45-to-DB-25 female DTE adapter or the RJ-45-to-DB-9 female DTE adapter (labeled “TERMINAL”).
Cable Pin-outs and Cabling Guide
Console Modem
(DTE) Console port Console cable Adapter Adapter (DCE)
signal RJ-45 pin RJ-45 pin DB-9 pin DB-25 pin signal
RTS 1 8 8 4 RTS
DTR 2 7 6 20 DTR
XMT 3 6 2 2 XMT
GND 4 5 5 7 GND
GND 5 4 5 7 GND
RCV 6 3 3 3 RCV
DSR 7 2 4 6 DSR
CTS 8 1 7 5 CTS
Remote Configuration
The configuration of the modem described in Step 3 contains the core settings that allow the modem to
function properly on the console port of the Cisco router. Commands in this section may be done remotely by
calling into the MT5634ZBA attached to the console port with another modem.
Note: Setting country configuration and turning on callback security cannot be done remotely. Nor can all
commands be executed remotely if the remote modem is set for callback security; remote configuration of a
modem so configured is not recommended.
1. Establish a data connection with a remote MT5634ZBA modem.
2.
Send three remote configuration escape characters followed by AT and the setup password, and
then press E
NTER. Example: %%%ATMTSMODEM. You have four tries to enter the correct
password before being disconnected. If the password is correct, the remote modem may respond
with OK. Note: If the modem has previously been configured with command echo off and result
codes off, it may be difficult to determine if the remote modem is responding to commands. The ATI
command can be used for this purpose. Even with echo and result codes off, the modem will
respond with the requested ID string if it is properly receiving the command.
3.
You can now send AT commands to configure the remote modem.
4.
When you have finished configuring the remote modem, save the new configuration by typing
AT&W0<CR>, then type ATO<CR> to exit remote configuration. You can then break the connection
in the normal way. Note: This step is important to ensure that the connection is broken cleanly.