Multitech MultiModem
MT5634ZBA-V-V92, Руководство пользователя

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6 Callback Security
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MultiModemZBA-V-V92 User Guide
Chapter 6 - Callback Security
This chapter describes how to use callback security with your modem.
Callback security protects your network from unauthorized access and helps control long-distance
costs. When callback security is enabled, all callers are requested to enter a password. If a valid
password is received, the modem hangs up and returns the call by dialing a phone number that is
stored with the password. The person being called back must then enter the password a second time
to establish a connection.
Up to 30 callback passwords and dialing strings can be stored in the modem. Each dialing string can
be up to 34 or 35 characters long and can contain commands as well as phone numbers. For mobile
callers, the dialing string can be programmed to allow the caller to bypass the stored callback number
by entering a temporary callback number, to enter an extension at the callback number, or to make a
direct connection without callback.
For local security, the passwords and dialing strings that are stored in the modem are protected from
tampering by a setup password, which you should change when you set up the modem. You can
further protect the modem against tampering by disabling its ability to respond to most AT
commands. To check for attempted break-ins, you can request the modem to display the number of
failed password attempts.
Setup
Your modem was shipped with a default setup password (MTSMODEM). The same password is
used for both callback security and remote configuration (Chapter 5). Because anyone who has ac-
cess to this guide has access to the default password, you should change the password during your
initial setup.
To Change the Setup Password
1. Open a data communications program such as HyperTerminal or PhoneTools.
2. In the terminal window, type AT#SMTSMODEM (or AT#S
xxxxxxxx if you have replaced the
MTSMODEM password with xxxxxxxx) and press E
NTER
. The modem responds with OK if the
setup password is correct, and ERROR if it is wrong.
3. To change the password, type AT#S= xxxxxxxx, where xxxxxxxx stands for the password, and
then press E
NTER
. The password can include any keyboard character, and can be up to eight
characters long. The modem responds with OK.
4. The new password is saved automatically. You can now either enter more AT commands or exit
the data communications program. The next time you wish to set up the modem, you must use
the new password.
CAUTION: Passwords are case-sensitive. The next time you enter the password, it must be in
the same case as you set it up.