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AT Command Set and S-Registers
Table 4-2. S-Register Reference (2 of 6)
S-Register Description
S6= n
Blind Dial Pause Time
This S-Register determines how long (in seconds) the
modem waits, after going off-hook, before dialing a
telephone number when Dial Tone Detect has been disabled
(X0, X1, or X3). The dial modifier W causes the modem to
ignore the contents of this register. Result code types X2 and
X4 enable dial-tone detection, but do not use this register.
n = 2–255 (seconds). Factory setting is 2 seconds.
If a value less than 2 is entered, the default value (2) will be
used.
S7= n
No Answer Time-out
This S-Register determines how long (in seconds) an
originating modem waits before abandoning a call when no
answer tone is received. This register also determines the
time duration for the W dial modifier.
n = 1–255 (seconds). Factory setting is 60 seconds.
S8= n
"," Pause Time for the Dial Modifier
This S-Register determines how long (in seconds) the
modem pauses when it encounters a comma (,) in the Dial
command string.
Accepts a value from 0 to 255 seconds.
Factory setting is 2 seconds.
S9= n
Carrier Detect Response Time
This S-Register determines how long the remote modem
carrier must be present on the telephone line before the
modem detects it and turns on Data Carrier Detect (DCD).
The longer the wait, the less likely that a false carrier
detection will occur due to noise on the line.
n = 1–255 (1/10 of a second).
Factory setting is 6 (0.6 seconds).
Issue 1 November 1994
4-21
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