
AT Commands and S-Registers
B-8 Issue 3 October 1995
Table B-1. AT Command and S-Register List (8 of 21)
AT Command/
S-Register
Description
S4=
n
LINE FEED CHARACTER
Sets the Line Feed Character to a value from
0 to 127.
Factory setting is 10, the ASCII line feed character.
S5=
n
BACKSPACE CHARACTER
Sets the backspace character to a value from 0 to 32.
The modem will not recognize a backspace character
of a higher value.
Factory setting is 08, the ASCII backspace character.
S6=
n
BLIND DIAL PAUSE TIME
Sets the amount of time the DataPort PCX modem
waits before dialing when Dial Tone Detect is disabled
(see X
n
). Accepts a pause time from 0 to
255 seconds, but values of 0 and 1 have the same
effect as a value of 2.
Factory setting is 2 seconds.
S7=
n
NO ANSWER TIMEOUT
Sets the amount of time the DataPort PCX modem
waits before abandoning a call that produces no
answer tone. Accepts a value from 0 to 255 seconds,
but a value of 0 has the same effect as a value of 1.
The timer is reset each time a “W” or “@” is
encountered in the Dial string. (See D
n
.)
Factory setting is 50 seconds.
S8=
n
PAUSE TIME FOR THE “,” DIAL MODIFIER
Sets the length of the pause invoked by a comma in
the Dial command string. (See D
n
.) Accepts a value
from 0 to 255 seconds.
Factory setting is 2 seconds.
S9=
n
CARRIER DETECT RESPONSE TIME
Determines how long the remote modem’s carrier
signal must be present before it is recognized by your
modem. Accepts a value from 1 to 255 in 0.1 second
increments.
Factory setting is 6 (0.6 seconds).
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