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6 Callback Security
60
MultiModemZBA-V-V92 User Guide
Calling Procedures
Use the following procedures to call a modem that has callback security enabled.
Note: Autoanswer must be enabled on the calling modem (S0=1).
Password-Only Callback
Use this procedure when calling from a fixed location.
1. Using a data communications program such as HyperTerminal or PhoneTools, dial the number of
the callback modem.
2. When the connection is established, the callback modem responds with the following message:
Password>
3. Type the password corresponding to the phone number for your modem, and press E
NTER. You
have three attempts or one minute to enter a valid password.
4. If the password is valid, the following message appears, and the modems disconnect:
OK Disconnecting
5. After the delay specified by the #CBD
n
command, the callback modem calls the number
associated with the password. If the callback modem is unable to establish a connection, it tries
again, up to the number of attempts specified by the #CBA
n
command.
6. After the modems reconnect, the following message reappears:
Password>
7. Type the same password that you used to initiate the call. You have three attempts to enter the
password or be disconnected.
8. If the password is valid, the following message appears and the modems establish a working
connection:
OK Connecting
Number-Entry Callback
Mobile callers should use this procedure when calling from a phone number different from that stored
with the password. The password that is used must be set up for optional number-entry callback.
1. Using a data communications program such as HyperTerminal or PhoneTools, dial the number of
the callback modem.
2. When the connection is established, the callback modem responds with the following message:
Password>
3. Type a number-entry password, press the plus key (+), type ATDT and the number to call back
to, and press ENTER. You have three attempts or one minute to enter a valid password.
Note: When you type your phone number, be sure to include the long distance and area codes if
they are needed.
4. If the password is valid, the following message appears, and the modems disconnect:
OK Disconnecting
5. After the delay specified by the #CBD
n
command, the callback modem calls the number that you
entered after the + character. If the callback modem is unable to establish a connection, it tries
again, up to the number of attempts specified by the #CBA
n
command.