Using Your Modem
3-5
Issue 2 May 1995
Making a Call
with Your Modem
The dial command (D) is used to place a call. When the modem
receives this command, it goes off-hook and connects the
modem to the phone line so that a call can be made (similar to
picking up a telephone’s handset), and dials the telephone
number specified in the command string.
Dial Command Strings contain the AT prefix, the dial
command (D), optional dial modifiers, and the telephone
number. A dial modifier tells the modem to perform additional
tasks when dialing a telephone number.
The following example shows the elements of a dial command
string:
Dial Modifiers
The following can be used as dial modifiers:
T – Touch-Tone Dialing. Any digit 0–9, * , # , A, B, C, or D can
be dialed as tone.
P – Pulse Dialing. Only the digits 0–9 can be dialed in Pulse
Dial mode.
- , ( ), and Space. These characters are ignored by the dial
string and can be included in the dial string to enhance
readability.
, – Pause. Causes the modem to pause before processing the
next character in the dial string. The length of this pause is
determined by the value held in S-Register S8, the Pause Time
configuration option.
