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User Guide
70
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 1 Sets the number of rings until
the modem answers.
ATS0=0 disables autoanswer
completely.
S1
1 ring 0–255 0 Counts the rings that have
occurred.
S2
decimal 0–127 43 (+) Sets ASCII code for the
128–255 escape sequence character.
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
33–127 backspace character. Values
greater than 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.
* These values may be different outside North America.