Specifications

DM562P
Operation Manual & AT Command Set
Integrated Data/Fax/Voice/Speakerphone Modem
20 Preliminary
Version: DM562P-MA-P01
July 12, 2000
the remote modem's carrier signal. If you want your
modem to ignore the Carrier Detect status and act as if
the remote modem's carrier signal is always present, set
the value to 255.
Register S11: Touch Tone Dialing Duration.
Register S11 controls the speed of the Touch Tone
(DTMF) dialing. You can change the value from 50 to
255 ms. The default value will be 95 ms which sets a
dialing rate of 5.26 digits per second. Increasing the
value to 255 slows the dialing rate to 1.9 digits per
second.
Note: Register S11 has no effect on pulse dialing, which
is fixed at 10 pulses per second.
Register S12: Escape Guard Time.
Register S12 controls the escape guard time ( i.e. the
time delay required before and after you enter the
escape characters). The guard time prevents your
modem from misinterpreting data as the escape
sequecce. This value is designated in measurements of
20 ms. The default value is 50 ( which is equivalent to
one second), although you can change it to between 0 (0
seconds) to 255 (5.1 seconds).
Register S14: Bit-mapped Register.
Bit-mapped register S14 lets you control modem echo,
responses, dialing method, and the originate or answer
mode.
Bit Function
0 = x Undefined.
1 = 0 Do not echo command (E0).
1 Echo command (E1) – default.
2 = 0 Responses appear (Q0) – default.
1 Responses do not appear (Q1).
3 = 0 Numeric responses (V0).
1 Verbose (Verbal) Responses (V1) – default.
4 = x Undefined.
5 = 0 Use touch-tone dialing method (T) – default.
1 Use pulse dialing method (P).
6 = x Undefined
7 = 0 Answer incoming calls (A)
1 Originate calls (D) – default
Register S16: Modem Tests.
Bit-mapped register S16 displays the modem tests
status.
Bit Function
0 = 0 Local analog loop back test off (&T0) –
default.
1 Local analog loop back test on (&T1).
1 = x Undefined.
Register S18: Duration of Modem Test.
Register S18 sets the amount of time for the modem
tests. The tests can run from 1 to 255 seconds,
depending on the value in this register. This register has
a default value of 0, which turns off the timer and tests
will run until manually terminated.
Register S21: Bit-mapped Register.
Bit-mapped register S21 lets you control certain data
communication control signals.
Bit Function
0,1=x Undefined.
2 = x Undefined.
3,4= 0 Modem ignores the DTR signal (&D0).
1 Modem enters command mode after ON-to-
OFF DTR transition (&D1).
2 Modem hangs up after ON-to-OFF DTR
transition (&D2) – default.
3 Modem resets after ON-to-OFF DTR transition
(&D3).
5 = 0 CD signal always on (&C0).
1 CD signal on when a remote carrier signal is
present (&C1) – default.
6 = x Undefined.
7 = 0 Long space disconnect turned off (Y0) – default.
1 Long space disconnect turned on (Y1).