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S19
Dial-Back Timer (336+ Only)
Unit: Minutes
Range: 0-255
Default: 1
Description: In the Series II Modem 336+ (MD1640A), S19
is a timer that begins when the lease line goes
down. S19 specifies the duration of time the
modem attempts to reestablish the lease line
connection.
S24
PBX/CBX Disconnect Drop Time for DSR/CTS/CD
Unit: 50-mSec intervals
Range: 0-255
Default: 20
Description: Some PBX and CBX phone systems require the
modem’s DSR, CTS, and/or CD signal(s) to
behave in a certain manner when calls are
disconnected. The Series II Modem’s &R, &S,
and &C commands cause the modem to drop
these signal(s) for a specified time period upon
disconnect, and then bring the signal(s) 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-mSec intervals
Range: 0 (50 mSec), 1-255
Default: 0
Description: S25 defines 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
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SERIES II INTELLIGENT DATA/FAX MODEMS