Chapter 4 – Remote Configuration
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Multi-Tech Systems, Inc. MT9234ZBA-USB User Guide (S000419D)
Chapter 4 - Remote Configuration
Remote configuration is a network management tool that allows you to configure modems anywhere in your
network from one location. With password protected remote configuration, you can issue AT commands to a
remote MultiModem product for maintenance or troubleshooting as if you were on site.
Basic Procedure
The following steps are valid regardless of whether the connection is established by the local or the remote Multi-
Tech modem.
1.
Establish a data connection with a remote MultiModem product.
2.
Send three remote configuration escape characters followed by
AT
and the setup password, and press
ENTER. Example:
%%%ATMTSMODEM
. You have four tries to enter the correct password before being
disconnected. If the password is correct, the remote modem responds with
OK
.
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
, and
pressing
Enter
.
5.
Type
ATO
and press
Enter
to exit remote configuration. You can then break the connection in the normal
way.
CAUTION:
If you hang up while you are in remote configuration mode, it may lock up the remote modem.
Setup
Multi-Tech modems are shipped with a default setup password (MTSMODEM). Because anyone who has an
owner’s manual knows the default setup password, for security you should change the password and possibly also
the remote configuration escape character.
Changing the Setup Password
1.
Open a data communications program such as Phone Tools or HyperTerminal.
2.
To change the password, type
AT#S=xxxxxxxx
, where xxxxxxxx stands for the password, and press
ENTER. The password can include any keyboard character, and must be one to eight characters long.
The modem responds with
OK
.
3.
The new password is saved automatically. You can now either enter more AT commands or exit the
data communications program. The next time you remotely configure the modem you must use the
new setup password.
Note:
You can only change the setup password locally; you cannot do it remotely. Also, passwords are case
sensitive. The next time you enter the password, it must be in the same case as you set it up.
Changing the Remote Escape Character
To increase security, you can change a remote modem’s remote configuration escape character. The remote
configuration escape character is stored in register
S9
. The factory default is 37, which is the ASCII code for the
percent character (%). For ASCII code characters, refer to Appendix E. Setting
S9
to 0 (zero) disables remote
configuration entirely—but if you do this remotely, you won’t be able to change it back remotely!
1.
Establish a remote configuration link with the remote modem as described in “Basic Procedure.”
2.
Type
ATS9=
n
, where n is the ASCII code for the new remote configuration escape character,
then press ENTER.
3.
Save the new value by typing
AT&W
and pressing ENTER.
4.
Type
ATO<CR>
to exit remote configuration.
