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6 Callback Security
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MultiModemZBA-V-V92 User Guide
Direct Connection
Use this procedure when you want to connect without first being called back. The password that you
use must be set up for an optional direct connection.
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 direct connection password, press the - key, and then press ENTER. 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 establish a working
connection:
OK Connecting
Note: You can make all calls direct connect regardless of whether the password or phone number
has the - character by using the %H1 command
Callback Security Commands
The following AT commands are used with callback security. Most can be entered
only after the setup password has been entered.
Command: #CBA
n
Callback Attempts
Values:
n
= 1–255
Default: 4
Description: Sets the number of callback attempts that are allowed after
passwords have been exchanged between modems. This
command can be used only after the setup password has been
entered and callback security enabled.
Command: #CBD
n
Callback Delay
Values:
n
= 0–255
Default: 15
Description: Sets the length of time (in seconds) that the modem waits
before calling back the remote modem. This command can be
used only after the setup password has been entered and
callback security enabled.
Command: #CBF? Callback Failed Attempts Display
Values: n/a
Default: n/a
Description: Requests the number of failed callback passwords since reset
or power-up. This number can be stored to nonvolatile memory
using the &W command. This command can be used only after
the setup password has been entered and callback security
enabled.