Specifications

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Chapter 4 - AT Commands, S-Registers and Result Codes
Register Unit Range Default Description
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, 7 Sets how long a carrier
255 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 70 Sets spacing and duration
80–255* 80* of dialing tones. 50 ms is
80–255‡ 80‡ 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.