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 brief ly 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 tim e, 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 f rom 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
ENTER, 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 (+++ meth od).
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)