User's Manual
V34bis Fax-modem - AJ 2885 P
AJ 2885 P - Page 37
6.3. Answerback
security
This security mode is controlled by the answering modem, and depends on a password
exchange which authorizes a modem connection, i.e.:
Calling
modem
Answering
modem
ATDxxx
ring
Training
ENQ ()
"AC24Y"
(for example)
"AC24Y"
control process
If the answerback matches the one stored in memory within two seconds after an ENQ code
was sent by the answering modem, access is granted.
Otherwise the modem disconnects automatically.
To store the answerback code, see the following example. The password can be up to 12
characters long.
Store answerback (for example: AC24Y)
AT&A:AC24Y:AC24Y <CR>
To disable answerback security
AT&A:: <CR>
6.4. Callback
security
6.4.1. Automatic
callback
This security mode is controlled by the
answering modem.
It sends a password and then calls back
the telephone number associated with that
password.
See %SA and %SB commands in the
reference manual.
Example:
HERE
THERE
N 3132
N 4142
ATS0=2
ATS0=2
AT%SB1
AT%SA1
AT&Z3:HERE:CALLB1:3132:::CD
ATD4142
Calling
Training
Password?
« call B1 »
Disconnecting
Calling (3132)
Training
Password ?
« Call B1 »
Modems are connected
This double security guarantees password and localization of the calling modem.
