Quick Reference Guide
56
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
escape code character.
S3
decimal 0–127 13 (^M) Sets ASCII code for the
RETURN character.
S4
decimal 0–127 10 (^J) Sets ASCII code for the
LINE FEED character.
S5
decimal 0–127 8 (^H) Sets ASCII code for the
BACKSPACE character.
S6
1 sec. 2–255 2 Sets the time the modem
4–255† 4† will wait for a dial tone
4–7‡ 4‡ before aborting a call.
S7
1 sec. 1–255 45 Sets the time the modem
1–45* 45* will wait for a carrier signal
1–55‡ 55‡ before aborting a call.
* Values for ZDXI modems and ZDX-DOC modems only.
† Values for ZDXI modems only.
‡ Values for ZDXK modems only.
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