Dial Modifiers - Multitech MT2834MR Owner's Manual

PN 88300150

3.7.2 Dial Modifiers

There are several commands 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 redials if a number is busy, and reverting to Command mode or
switching to Answer mode after dialing.
P, T Pulse or Tone Dialing
The MT2834MR can dial numbers using either pulse or tone dialing, or a combination of both
methods. Pulse dialing is the method used by rotary-dial telephones, which involves the
timed opening and closing of a line relay. Tone dialing is that used by pushbutton Touch-
Tone™ telephones, and is sometimes referred to as DTMF, or Dual-Tone Multi-Frequency
dialing.
The dialing method is controlled by typing 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, to pulse-dial the number 555-1212, type ATDP5551212 and hit ENTER. To
tone-dial the same number, type ATDT5551212 and hit ENTER.
If neither Pulse nor Tone dialing is specified in the dial command, the MT2834MR uses
whatever method was last used. If the modem has been reset or was just powered up, it uses
Pulse dialing, even if you do not include the letter P in your dial command.
Nearly all telephone systems in the U.S. are compatible with tone dialing. Since that is the
faster method, you will probably use tone dialing.
An example of combining pulse and tone dialing could involve a PBX system where 9 has to
be pulse-dialed first, then the rest of the number tone-dialed after pausing for a second dial
tone. To dial the number, type ATDP9, T5551212 and hit ENTER. (The comma causes a
pause, which is explained soon.)
&P Set Pulse Dial Ratios
The &P command sets the time ratios between the open and closed positions of the dialing
pulse frequencies. To set a dialing pulse ratio of 60mSec to 40 mSec, type AT&P0. To set a
ratio of 67 mSec to 33 mSec, type AT&P1. The factory default setting is &P0.
The &P command is not available on the MT2834MRK.
,
Automatic Pauses in Dialing
You can cause the MT2834MR to pause during the dialing sequence by typing a comma (
character where the pause is desired. This pause lasts two seconds (4.8 seconds on the
MT2834MRK). If a longer pause is desired, more than one comma may be typed
consecutively, with each one causing a two second pause. You can also change the length
of the pause caused by the comma from 0 up to 255 seconds with S-Register S8 (refer to
Chapter 4).
Each comma used in a dialing command does count as one of the sixty allowed characters.
Y Long Space Disconnect
The Y command enables or disables the modem's ability to respond to a long space
disconnect condition. The command Y0 disables it (factory default setting) and Y1 enables it.
W Wait for New Dial-Tone
A W inserted in the dialing command causes the MT2834MR to wait for another dial tone,
and the modem will not resume dialing until another dial tone is detected.
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