Siemens Insys 56k Operating Manual page 37

Pocket Modem 56k
Command
ATD<n>
Dezember 05
Description
Dial
The modem goes off-hook and dials according to the dialing string transmitted via the
ATD command. After it dialed, the modem attempts to establish a connection. If the
ATD command 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 FCLASS=0 the modem acts like a data modem. 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 period is exceeded, the modem hangs up and the following error message
appears: NO CARRIER is displayed.
In the modus 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):
The digits from 0 to 9
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
Pulse dialing mandatory: Pulse or tone dialing is required according to
P
the region.
Tone dialing mandatory: Pulse or tone dialing is required according to
T
the region.
Wait for dialing tone: The modem waits for the dialing tone before it
W
starts to dial. If no dialing tone was detected within the period specified
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
period 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 waiting
period, a connection is established.
‚ Dial tone delay: The modem performs a dial tone delay before it
executes the next character of the parameter string. The delay length is
defined in the S8 registry.
AT commands
31