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4 S-Registers
CommPlete Communications Server 49
S24 PBX/CBX Disconnect Drop Time for DSR/CTS/CD
Unit: 50 ms
Range: 0–255
Default: 20 (1 second)
Some PBX and CBX phone systems require the modem’s DSR, CTS, and/or CD signals to drop briefly when
calls are disconnected. The MT3334HD8’s &R, &S, and &C commands can cause the modem to drop these
signals for a specified time upon disconnect, and then bring the signals up again. S24
defines the length of
time that the signals drop. The default setting of 20 results in a one-second drop time, which is what most
PBX/CBX systems with this requirement need.
S25 DTR Dropout Time
Unit: 100 ms
Range: 0, 1–255
Default: 0 (50 ms)
S25
sets the amount of time that DTR must be dropped before the modem disconnects. Typically, a
disconnect occurs when DTR is dropped for 50 milliseconds or more. This dropout time can be increased
up to a maximum of 25.5 seconds. The S25 unit value for zero is 50 ms. For values from 1 through 255, the
unit value is 100 ms.
S30 Inactivity Timer
Unit: 1 minute
Range: 0, 1–255 minutes
Default: 0 (disabled)
S30
can be used to cause the modem to disconnect if no data is transmitted or received for a specified
time. S30
runs during both reliable and non-error correction connections. The timer restarts any time a
data character passes through the serial port (either sent or received). If noise on the phone line causes an
error to be received during non-error correction mode, this also will restart the S30
timer. The factory
default of zero disables the timer.
S32 Time Lapse for Escape Sequence
Unit: 100 ms
Range: 0–255
Default: 20 (2 seconds)
S32
sets the time period to validate the escape sequence. If the S32
time interval expires before you press
E
NTER, then the escape sequence is aborted. The default is two seconds.
S34 Command Buffer Length After Online Escape Sequence
Unit: Decimal
Range: 0–60
Default: 10
Sets the number of characters allowed in an AT command after an in-band online escape (+++ method).
If the number of characters after “AT” exceeds the S34
buffer length value, then the buffer is flushed and
the escape sequence is aborted.
S36 DTR Busy-Out Time
Unit: 1 second
Range: 0–255
Default: 0 (disabled)