User`s guide

AT Commands and S-Registers
B-9
Issue 3 October 1995
Table B-1. AT Command and S-Register List (9 of 21)
AT Command/
S-Register
Description
S10= n NO CARRIER DISCONNECT
255 = Disable
Sets the amount of time the DataPort PCX modem
will wait before disconnecting when no carrier signal
is detected. Accepts a value from 0 to 254 in
0.1 second increments. S10 must be set to a value
higher than the value of S9 or the modem will
disconnect before it recognizes the carrier.
Factory setting is 14 (1.4 seconds).
S11= n DTMF TONE ON TIMER
Sets the duration of a DTMF tone (touch-tone).
Accepts a value from 50 to 255 milliseconds. A value
less than 50 defaults to 50 milliseconds.
Factory setting is 95 milliseconds.
S12= n ESCAPE GUARD TIME
Sets the duration of the pause required before and
after an escape sequence (+++) for it to be treated as
an escape sequence and not data. Accepts a value
from 0 to 255 in 20 millisecond increments.
Factory setting is 50 (1 second).
S18= n TEST TIMEOUT
Sets the duration of any test initiated by the
&T command. If S18=0, a test runs indefinitely
unless manually canceled (see &T0). Accepts a value
of 0 for Disable, or from 1 to 255 seconds.
Factory setting is 0 (Disable).
S25= n DELAY TO DTR
Sets the length of time that the modem will ignore
DTR before taking the action specified by &D
n . S25
specifies duration in seconds for synchronous modes
and 10-millisecond increments for other modes.
Accepts a value from 0 to 255.
Factory setting is 5.