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APPENDIX E: S-Register Summary
Appendix E - S-Register Summary
S-REG.
UNIT RANGE DEFAULT
DESCRIPTION
S0 Rings 0-255 1 Sets number of rings
before modem answers.
S1 Rings 0-255 0 Counts rings which have
occurred.
S2 ASCII 0-127 43 Sets Escape Code
character (default is
plus “+” sign).
S3 ASCII 0-127 13 Sets character recog-
nized as RETURN
(default is CTRL-M).
S4 ASCII 0-127 10 Sets character
recognized as LINE
FEED (default is CTRL-
J).
S5 ASCII 0-32,127 8 Sets character recog-
nized as BACKSPACE
(default is CTRL-H).
S6 Seconds 2-255 2 Determines wait-time
for dial tone.
S7 Seconds 1-255 45 Determines how long
modem waits for carrier
before aborting call.
S8 Seconds 0-255 2 Sets pause time caused
by a comma character in
a dial command.
S9 100 mSec 1-255 6 Sets carrier detect
response time.