3 AT Commands
CommPlete Communications Server 17
pauses in the dial sequence, automatic redials if a number is busy, and reverting to command mode or
switching to answer mode after dialing.
P, T Pulse or Tone Dialing
Default: P
The MT3334HD8’s modems can dial numbers by using pulse dialing, tone dialing, or a combination of
both methods. Pulse dialing, used by rotary-dial telephones, uses the timed opening and closing of a relay
to encode the numbers. Tone dialing, used by push-button (touch-tone) telephones, uses dual tone
multifrequency (DTMF) dialing.
P selects pulse dialing.
T selects tone dialing.
Insert P or T in the dialing command just before the digits you want to pulse- or tone-dial.
For example, to pulse-dial the number 555-1212, type ATDP5551212 and press ENTER. To tone-dial the
same number, type ATDT5551212 and press ENTER. If neither pulse nor tone dialing is specified in the
dial command, the modem uses whatever method was used last.
Immediately after the modem has been turned on or reset, it uses pulse dialing, even if you do not include
P in your dial command.
As an example of combining pulse and tone dialing, assume you are calling o ut of a PBX (switchboard)
system where a
9
has to be pulse-dialed, then the rest of the number has to be tone-dialed after pausing for
a second dial tone. To dial this example, type ATDP9,T5551212 and press ENTER. (The comma causes a
pause.)
W Wait for New Dial Tone
Inserting W into the dialing command causes the modem to wait for another dial tone before it resumes
dialing. (It is not necessary to enter W at the beginning of the dialing command.)
Because the modem must be able to detect the dial tone for this command to work, you alsomust select wait-for-dial-tone dialing with the X2 or X4 command.