S-registers, 4 at commands, s-registers, and result codes, Multimodemzpx user guide – Multi-Tech Systems MT5634ZPX-PCI-V92 User Manual
Page 45
4 AT Commands, S-Registers, and Result Codes
40
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
Range
Default
Description
S0
1 ring
0, 1–255
0
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.
S1
1 ring
0–255
0
Counts the rings that have occurred.
S2
decimal 0–255
43 (+)
Sets ASCII code for the escape sequence char-
acter. Values greater than 127 disable escape.
S3
decimal 0–127
13 (^M) Sets the ASCII code for the carriage return
character.
S4
decimal 0–127
10 (^J)
Sets the ASCII code for the line feed character.
S5
decimal 0–32,
8 (^H)
Sets the ASCII code for the backspace char-
33–127
acter. Values over 32 disable backspace.
S6
seconds 2–65*
2*
Sets the time the modem waits after it goes
off-hook before it begins to dial the telephone
number.
S7
seconds 1–255*
50*
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.
S8
seconds 2–65
2
Sets the length of a pause caused by a comma
character in a dialing command.
S9
decimal 0, 1–127
37 (%)
Sets ASCII code for remote configuration
escape character. S9=0 disables remote
configuration.
S10
100 ms
20–255
20
Sets how long a carrier signal must be lost
before the modem disconnects.
S11
1 ms
50–150*
95*
Sets spacing and duration of dialing tones.
S28
decimal 0, 1–255
1
0 disables, 1–255 enables V.34 modulation.
S30
1 minute 0, 1–255
0
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
S35
decimal 0–1
0
0 disables, 1 enables the V.25 data calling
tone, which allows remote data/fax/voice
discrimination.
S36
decimal 0–7
7
Specifies the action to take in the event of a
negotiation failure when error control is se-
lected. See S48.
* These values may be different outside North America.