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CHAPTER 7: Callback Security
3. To change the password, type AT#S=xxxxxxxx, where xxxxxxxx stands for the
password, and then press ENTER. 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.
7.1.2 T
O
T
URN
C
ALLBACK
S
ECURITY
O
N AND
O
FF
Callback security must be turned on to enter many callback security commands.
1. Open a data communications program such as HyperTerminal or
PhoneTools.
2. In the terminal window, type AT#Sxxxxxxxx, where xxxxxxxx is your password,
and press ENTER. The modem responds with OK if the setup password is
correct, and ERROR if it is wrong.
3. Type one of the following commands:
• To turn off callback security, type AT#CBS0 and press ENTER. Callers no
longer need a password to connect to the modem, the modem is unable to
call them back, and the stored dialing command locations 0–3 become
available.
• To turn on both local and remote callback security, type AT#CBS1 and
press ENTER. With local security turned on, you must enter the setup
password before you can enter any AT command except the AT, ATIn, and
AT#Sxxxxxxxx
commands. For a description of remote callback security, see
the following paragraph.
• To turn on remote callback security only, type AT#CBS2 and press ENTER.
With remote callback security turned on, each caller is asked to enter a
password, is called back, and then is asked to enter the password again
before a connection can be made. Also, dialing command locations 0–3, for
use with the DS=y dialing command, are replaced by callback dialing
command locations 0–29.
