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MultiModemZPX User Guide
S-Registers
Certain modem values, or parameters, are stored in memory locations called S-registers.
Use the S command to read or to alter the contents of S-registers (see previous section).
Register Unit
S0
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
S28
S30
S35
S36
* These values may be different outside North America.
4 AT Commands, S-Registers, and Result Codes
Range
Default
1 ring
0, 1–255
0
1 ring
0–255
0
decimal 0–255
43 (+)
decimal 0–127
13 (^M) Sets the ASCII code for the carriage return
decimal 0–127
10 (^J)
decimal 0–32,
8 (^H)
33–127
seconds 2–65*
2*
seconds 1–255*
50*
seconds 2–65
2
decimal 0, 1–127
37 (%)
100 ms
20–255
20
1 ms
50–150*
95*
decimal 0, 1–255
1
1 minute 0, 1–255
0
decimal 0–1
0
decimal 0–7
7
Description
Sets the number of rings until the modem
answers. ATS0=0 disables autoanswer com-
pletely. Range varies by country. Set S0=2
for Caller ID.
Counts the rings that have occurred.
Sets ASCII code for the escape sequence char-
acter. Values greater than 127 disable escape.
character.
Sets the ASCII code for the line feed character.
Sets the ASCII code for the backspace char-
acter. Values over 32 disable backspace.
Sets the time the modem waits after it goes
off-hook before it begins to dial the telephone
number.
Sets the time the modem waits for a carrier
signal before aborting a call. Also sets the
wait-for-silence time for the @ dial modifier.
Sets the length of a pause caused by a comma
character in a dialing command.
Sets ASCII code for remote configuration
escape character. S9=0 disables remote
configuration.
Sets how long a carrier signal must be lost
before the modem disconnects.
Sets spacing and duration of dialing tones.
0 disables, 1–255 enables V.34 modulation.
Sets the time the modem waits before it dis-
connects when no data is sent or received. A
value of zero disables the timer. See also the
\T command
0 disables, 1 enables the V.25 data calling
tone, which allows remote data/fax/voice
discrimination.
Specifies the action to take in the event of a
negotiation failure when error control is se-
lected. See S48.
40
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