Modem User Guide MT3334HD8
D S-Register Summary
CommPlete Communications Server 73
Appendix D S-Register Summary
Register Unit Range Default Description
S0 1 ring 0, 1–255 1 Sets the number of rings until the modem
answers. ATS0=0 disables auto answer
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
4–255†
4–7‡
2
4†
4‡
Sets the time the modem will wait for a dial tone
before aborting a call.
S7 1 sec 1–255
1–45*
1–55‡
45
45*
55‡
Sets the time the modem will wait for a carrier
signal before aborting a call.
S8 1 sec 0–255
4–255†
4–7‡
2
4†
4‡
Sets the length of the pause caused by a comma
character in a dialing command.
S9 100 ms 1–255 6 Sets delay between when the modem detects a
valid carrier signal and when it turns on its CD
circuit.
S10 100 ms 1–254,
255
7 Sets how long a carrier signal must be lost before
the modem disconnects. S10=255 causes the
modem to not disconnect with loss of carrier.
S11 1 ms 1–255
80–255*
80–255‡
70
80*
80‡
Sets spacing and duration of dialing tones. 50
ms is the recommended minimum..
S13 decimal 0, 1–127 37 (%) Sets ASCII code for remote configuration escape
character. S13=0 disables remote configuration.
S17 10 ms 1–255 25 Sets the length of the break time (space) sent to
the local PC when the modem receives a remote
break.
S24 50 ms 0–255 20 Sets the time the DSR, CTS, and CD signals
drop before going high again. Used for some
PBX and CBX phone systems.
S25 100 ms 0, 1–255 0 Sets the time the DTR signal must be dropped
before the modem disconnects. The 0 default
equals 50 ms.
S30 1 min. 0, 1–255 0 Sets how long the modem waits after the last
character is received or transmitted before it
disconnects. The 0 default disables the timer.
S32 100 ms 0–255 20 Sets the time the modem will wait for a RETURN
to be entered during escape sequence execution.
S34 1 char-
acter
0–60 10 Sets the number of command characters allowed
after +++AT.
S36 1 sec 0, 1-255 5 Sets the time between DTR inactive and modem
off-hook. S36=0 disables DTR busy-out.
S37 1 sec 0-255 5 Sets the time between DTR active and modem
on-hook.