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MT9234ZBA-USB-CDC-XR User Guide
This chapter describes how to use a network management tool 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. This chapter also describes how
to change default passwords and characters to enhance the security of the product.
Remotely Configuring the Modem
The following steps are valid for connections 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.
After 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 or disconnect while in remote configuration mode, the remote modem may lock up.
Changing Default Passwords and Escape Character
Multi-Tech modems are shipped with a default setup password (MTSMODEM). Anyone who has an owner’s
manual knows the default setup password. As such, for security reasons, change the password and 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 change 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.
