AT Commands and S-Registers
B-10
Issue 1 April 1994
Table B-1. AT Command and S-Register List (9 of 34)
AT
Command/
S-Register
Description
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/
1000 msec).
S13=
n
DTMF Tone Off Timer
Sets the duration of the wait between DTMF
tones (touch-tones). Accepts a value from 50 to
255 milliseconds. A value less than 50 defaults to
50 milliseconds. Factory setting is 70
milliseconds.
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.
S25=
n
DTR Detection
Sets the amount of time between the DataPort
2001 detecting loss of DTR and the DataPort
2001 responding to loss of DTR. This setting is
used to determine the DTR delay required by the
&D4 command.
Accepts a value of 0 for Disable, or from 1 to 254
(in 0.1 second increments), or 255 for infinite
delay.