DM562AP
Operation Manual & AT Command Set
Integrated Data/Fax/Voice/Speakerphone Modem
Preliminary
25
Version: DM562AP-MA-P01
February 2, 2004
Register
S10
: Carrier Loss Time.
Register S10 sets the time between the loss of a remote
modem's carrier signal and when the local modem
disconnects. This allows the remote modem's carrier
signal to momentarily disappear from the telephone
line. The value of this register is in tenths of a second.
The default value is 1.4 seconds, although you can
change it from 1 to 255. You may want to set this value
higher if you have a noisy telephone line that might
interfere with 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.
