Total Control MP/16, Operator'S Manual

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AT Command Reference D-21
Register Default Function
S17 0 Reserved.
S18 0 Test timer for software-initiated loopback testing
(&T
n)
, disabled when S18 is set to 0. See Appendix
H. Used to set the duration of testing, in seconds,
before the modem automatically times out and
terminates the test.
S19 0 Sets the duration, in minutes, for the Inactivity
Timer . The timer activates when there is no data
activity on the phone line and at the timeout, the
modem hangs up. S19=0 disables the timer.
S20 0 Reserved.
S21 10 Sets, in 10-millisecond units, the length of Breaks sent
from the modem to the computer or terminal.
Applies to ARQ mode only.
S22 17 Stores the ASCII decimal code for the XON
character.
S23 19 Stores the ASCII decimal code for the XOFF
character.
S24 150 Sets the duration, in 20-millisecond units, between
pulsed DSR signals when the modem is set to &S2 or
&S3. The default is 3 seconds.
S25 5 Sets DTR recognition time in 10 millisecond units.
S26 1 Reserved.