Westermo TD-34 - Manual (Page 22)

22 6610-2203
D – Dial
This command directs the modem to go on-line, dial according to the string entered and
attempt to establish a connection. If no dial string is supplied, the modem will go on-line and
attempt the handshake in originate mode.
NOTE:
If the ATD command is issued before the S1 register has cleared, the modem will respond
with the NO CARRIER result code.
The modem will behave as a data modem and will attempt to connect to another data
modem.The modem will have up to the period of time specified by register S6 to wait for
carrier and complete the handshake. If this time expires before the modem can complete the
handshake, the modem will go on-hook with the NO CARRIER response.This command will
be aborted in progress upon receipt of any DTE character before completion of the hand-
shake.
Syntax: ATD
Dial Modifiers
The valid dial string parameters are described below. Punctuation characters may be used
for clarity, with parenthesis, hyphen, and spaces being ignored.The valid dial string parame-
ters are described below. Punctuation characters may be used for clarity, with parenthe-
ses, hyphen, and spaces being ignored.
0-9 DTMF digits 0 to 9.
* The ’star’ digit (tone dialing only).
# The ’gate’ digit (tone dialing only).
A-D DTMF digits A, B, C, and D. Some countries may prohibit sending of these
digits during dialing.
L Re-dial last number: the modem will re-dial the last valid telephone number.
The L must be immediately after the D with all the following characters
ignored).
R This command will be accepted, but not acted on.
S=n Dial the number stored in the directory (n = 0 to 3). (See &Z.)
! Flash: the modem will go on-hook for a time defined by the value of S29.
W Wait for dial tone: the modem will wait for dial tone before dialing the digits
following ”W“. If dial tone is not detected within the time specified by S6 or
S7, the modem will abort the rest of the sequence, return on-hook, and gen-
erate an error message.
@ Wait for silence: the modem will wait for at least 5 seconds of silence in the
call progress frequency band before continuing with the next dial string
parameter. If the modem does not detect these 5 seconds of silence before
the expiration of the call abort timer (S7), the modem will terminate the call
attempt with a NO ANSWER message. If busy detection is enabled, the
modem may terminate the call with the BUSY result code. If answer tone
arrives during execution of this parameter, the modem handshakes.
& Wait for credit card dialing tone before continuing with the dial string. If the
tone is not detected within the time specified by S6 or S7, the modem will
abort the rest of the sequence, return on-hook, and generate an error mes-
sage.