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SERIES II INTELLIGENT DATA/FAX MODEMS
Voice/Data Dialing $VD
Another alternate method of causing the Series II Modem to
automatically dial is Voice/Data Dialing. With Voice/Data Dialing, the
modem automatically dials the phone number stored in the N1 position
of memory whenever the Voice/Data switch is toggled. You must first
enter AT$VD1&W0<CR>. This command string enables Voice/Data
dialing when the Voice/Data toggle switch is activated. To disable
Voice/Data Dialing (default), enter the command AT$VD0 W0<CR>.
5.4.2 Dial Modifier Commands
There are several command characters that can be included within a
dialing command (following the letter D), called “Dial Modifiers”. They
have various functions, including the selection of Pulse or Tone Dialing,
pauses in the dial sequence, automatic re-dials if a number is busy, and
reverting to the Command mode or switching to the Answer mode after
dialing.
Pulse or Tone Dial P or T
The Series II Modem dials numbers using either pulse or tone dialing,
or a combination of both methods. Pulse dialing is a method used by
rotary-dial telephones, which involves the timed opening and closing of
line relay.
Tone dialing is the method used by push-button (touch tone) telephones,
and is sometimes referred to as DTMF, or Dual-Tone Multi-Frequency
dialing.
The method used is selected by including a P for Pulse or a T for Tone
in the dialing command, right before the digits you wish to have dialed
in that manner.
For example, you would pulse-dial the number 555-1212 by entering
ATDP5551212 and hitting RETURN. You could tone-dial the same
number by entering ATDT5551212 and hitting RETURN. If neither
Pulse nor Tone dialing is specified in the dial command, the Series II
Modem uses whatever method used last. If the modem has been reset or
just powered up, it uses Pulse dialing, even if the letter P is not included
in your dial command.