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MultiModemZBA-V-V92 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
S18
S28
S30
S35
* These values may be different outside North America.
Range
Default
1 ring
0–255
1
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
0–127
8 (^H)
seconds 2–65*
2*
seconds 1–255*
50*
seconds 2–65
2
decimal
0–127
37 (%)
100 ms
1–255
20
1 ms
50–150*
95*
50 ms
0–255
20
decimal
0, 1–255
1
1 minute 0, 1–255
0
decimal
0–1
0
4 AT Commands, S-Registers, & Result Codes
Description
Sets the number of rings until the modem
answers. ATS0=0 disables autoanswer
completely. Range varies by country. Set
S0=2 for Caller ID.
Counts the rings that have occurred.
Sets ASCII code for the escape sequence
character. Values greater than 127 disable
escape.
character.
Sets the ASCII code for line feed character.
Sets the ASCII code for the backspace
character. Values over 32 disable it.
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.
Sets the time the CD signal drops before
going high again. Used for some PBX and
CBX phone systems. See &C2 command.
0 disables, 1–255 enables V.34 modulation.
Sets the time the modem waits before it
disconnects 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.
40
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