insys icom i-modul 144/56k, Руководство дизайнера, Страница: 29 / 63

i-modul Modem 144/56k AT Command Reference
Command Description
AT&C<n>
DCD (CT109) behaviour
Behaviour of the RS232 DCD output of the i-modul Modem 144/56k 3.0 basic.
AT&C0
DCD is always ON
AT&C1
DCD follows the carrier signal on the phone line (default)
ATD<n>
Dialling
The i-modul Modem 144/56k 3.0 basic goes off-hook and dials according to the
dialling string handed over with the
ATD
command. After dialling, the i-modul
Modem 144/56k 3.0 basic tries to establish a connection. If the
ATD
command
has been executed without a dialling string, the i-modul Modem 144/56k 3.0 ba-
sic goes off-hook and tries to establish a connection to the other i-modul Modem
144/56k 3.0 basic (without dialling). The behaviour of the i-modul Modem 144/56k
3.0 basic depends on the activation of the line current detection (refer to
ATX
command).
The execution of the
ATD
command also depends on the time when the last
dialling attempt was performed.
The i-modul Modem 144/56k 3.0 basic behaves like a data modem in the mode
AT+FCLASS=0
. It attempts to connect to another data modem. This attempt is
repeated until the waiting period that was specified in the S7 registry has expired.
If this time is exceeded, the i-modul Modem 144/56k 3.0 basic hangs up and
displays the error message:
NO CARRIER
.
The i-modul Modem 144/56k 3.0 basic behaves like a fax modem in the mode
FCLASS=1 or =2. It attempts to connect to another fax or fax modem. (The i-
modul Modem 144/56k 3.0 basic goes into receive status HDLC V.21 channel 2,
as if the command
AT+FRH
has been executed).
The following characters may be transmitted as parameters (brackets, punctua-
tion marks, spaces and semicolons are ignored):
0 to 9
The digits from 0 to 9
*
The asterisk: only for tone dialling
#
The hash: only for tone dialling
A-D
The tone dialling characters A, B, C, D
P
Pulse dialing mandatory: Pulse or tone dialing is required according
to the region.
T
Tone dialing mandatory: Pulse or tone dialing is required according
to the region.
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