INSYS 56k small INT 2.0 Operating Manual page 49

INSYS Modem 56k small INT 2.0/USB 1.0
Command
ATD<n>
June 06
Description
Dial
The modem goes off-hook and dials according to the transmitted dialing string. After
the dialing procedure, the modem attempts to establish a connection. If the ATD com-
mand was performed without a dialing string, the modem goes off-hook and attempts
to connect to the other modem (without dialing). The behavior of the modem depends
on the activation of the line current recognition (see ATX command).
The execution of the ATD command also depends on when the last dialing attempt
was performed.
In the mode AT+FCLASS=0, the modem acts like a data modem. It attempts to con-
nect to another data modem. This attempt is repeated until the waiting period that
was specified in the S7 registry has expired.
If this period is exceeded, the modem hangs up and the following error message ap-
pears: NO CARRIER.
In the mode FCLASS=1 or =2, the modem acts as a fax modem. It attempts to connect
to another fax or fax modem. (The modem goes into receive status HDLC V.21 channel
2, as if the command AT+FRH had been executed.)
The following characters may be transmitted as parameters (brackets, punctuation
marks, spaces and semicolons are ignored):
0 to 9 The digits from 0 to 9
* The asterisk: Only for tone dialing
# The hash: Only for tone dialing
The inband signaling characters A, B, C, D
A-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.
W Wait for dialing tone: The modem waits for the dialing tone before it
starts to dial. If no dialing tone was detected within the period speci-
fied in the S6 registry, the modem hangs up and an error message is
displayed.
@ Waiting for silence: The modem waits at least five seconds for silence
in the line, before it executes the next character from the parameter
string. If this five second silence can not be detected and the abort pe-
riod in the S7 registry has not been exceeded, the modem terminates
the connection displaying the message: NO ANSWER.
If busy signal recognition was activated, the modem terminates the
connection displaying the message: BUSY.
If a response tone from the other modem is received during the wait-
ing period, a connection is established.
AT Command Set
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