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Reg Default
S15
0
S16
0
S17
0
S18
0
S19
0
S20
0
S21
10
S22
17
50
Sportster Winmodem 33600 & x2/56K - User's manual
Function
Bit-mapped register. To set the register see
the instructions for S13.
Bit Value Result
0 (zero)1
Disable ARQ/MNP for V.22.
1
2
Disable ARQ/MNP for .22bis.
2
4
Disable ARQ/MNP for
V.32/V.32bis/V.32terbo.
3
8
Disable MNP handshake.
4
16
Disable MNP level 4.
5
32
Disable MNP level 3.
6
64
MNP incompatibility.
7
136
Disable V.42 detection phase.
Bit-mapped test register. Allowable value is
2.
Bit Value Result
0
Reserved.
1
2
Touch tone dialing test.
2–7
Reserved.
Reserved.
Test timer for &T n loopback testing. Sets the
time in seconds of testing before the modem
automatically times out and terminates the
test. When set to 0, the timer is disabled.
Sets the duration, in minutes, for the Inac-
tivity Timer. The timer activates when there is
no data activity on the phone line; at timeout
the modem hangs up. S19 = 0 disables the
timer.
Reserved.
Sets the length, in 10-millisecond units, of
breaks sent from the modem to the compu-
ter; applies to ARQ mode only.
Stores the ASCII decimal code for the XON
character. Valid range is 0–127.
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