i-modul Modem 144/56k
AT Command Reference
Command
Description
ATD<n>
(Continuation)
Default:
Ringing tone is sent for fax operation. No ringing tone for data op-
eration.
(
)
Are ignored: They are just used as an outline.
-
Are ignored: They are just used as an outline.
‚ ‚
Space characters are ignored: They are just used as an outline.
Examples:
ATD12345
Dial the phone number 12345
ATDP12345
Dial the phone number 12345 with the pulse dialling method
ATDT12345
Dial the phone number 12345 with the tone dialling method
ATX3D0W12345
For PBXs, which connect to the exchange line using the prefix 0 (or
9): First, blind dialing is activated by:
X3
(refer to the
ATX3
com-
mand) to be able to dial a leading 0 without hearing a dialling tone.
After 0 has been dialled via:
D0
, dialling tone recognition can be
switched on again using the parameter:
W
. The i-modul Modem
144/56k 3.0 basic thus waits for the dialling tone and continues
with the rest of the dial-up (via: 12345) only after hearing the dial-
ling tone. Waiting for the dialling tone may be omitted. In this case,
the dialling command is
ATX3D012345
.
AT&D<n>
DTR (CT108/2) Behaviour
DTR (CT108/2) behaviour – Monitoring on/off transitions of the RS232 DTR line of
the PC.
AT&D0
DTR is ignored. Allows the operation with PCs which do not oper-
ate DTR.
AT&D1
A DTR on/off transition causes the i-modul Modem 144/56k 3.0
basic to react as if it had received an escape sequence
+++
. The i-
modul Modem 144/56k 3.0 basic changes to input mode without
hanging up.
AT&D2
A DTR on/off transition causes the i-modul Modem 144/56k 3.0
basic to hang up. Going off-hook automatically is not possible. (de-
fault)
AT&D3
A DTR on/off transition causes the i-modul Modem 144/56k 3.0
basic to perform a reset as if an
ATZ
command has been executed.
A preceded
AT&Y
command decides if either the default 0 or 1 is
loaded.
AT+DS=<n>
Enable/disable V.42bis data compression
AT+DS=0
Disables V.42bis data compression
AT+DS=3
Enables V.42bis data compression (default)
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