Chapter 2 - S-Registers - Multitech 5634 Series Reference Manual

Chapter 2 - 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
S0 1 ring 0–255
S1 1 ring 0–255
S2 decimal 0–255
S3 decimal 0–127
S4 decimal 0–127
S5 decimal 0–127
S6 seconds 2–65*
S7 seconds 1–255*
S8 seconds 2–65
S9 decimal 0–127
S10 100 ms 1–255
S11 1 ms 50–150*
S18 50 ms 0–255
S28 decimal 0, 1–255
S30 1 minute 0, 1–255
S35 decimal 0–1
S36 decimal 0–7
Multi-Tech Systems, Inc. AT Commands Reference Guide (PN S000272E)
Default Description
0,1 Sets the number of rings until the modem answers.
ATS0=0 disables autoanswer completely. Range varies
Set S0=2 for Caller ID.
Internal Modem Default is 0
External Modem Default is 1
0 Counts the rings that have occurred.
43 (+) Sets ASCII code for the escape sequence character. Values
greater than 127 disable escape.
13 (^M) Sets the ASCII code for the carriage return character.
10 (^J) Sets the ASCII code for line feed character.
8 (^H) Sets the ASCII code for the backspace
over 32 disable it.
2* Sets the time the modem waits after it goes off-hook before it
begins to dial the telephone number.
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.
2 Sets the length of a pause caused by a comma character in a
dialing command.
37 (%) Sets ASCII code for remote configuration escape character.
S9=0 disables remote configuration.
20 Sets how long a carrier signal must be lost before the modem
disconnects.
95* Sets spacing and duration of dialing tones.
20 Sets the time the Callback Delay signal drops before going
high again. Used for some PBX and CBX phone systems. See
&C2 command.
1 0 disables, 1–255 enables V.34 modulation.
0 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 0 disables, 1 enables the V.25 data calling tone, which allows
remote data/fax/voice discrimination.
7 Specifies the action to take in the event of a negotiation failure
when error control is selected. (See S48.)
Chapter 2 – S-Registers
character. Values
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