T
ECHNICAL
Q
UICK
R
EFERENCE
132
Register Default
Function
S15 (cont.)
Bit
Value
Result
6
64
MNP incompatibility.
7
128
Disable V.42 operation.
To disable V.42 detect phase, select the total of the values for bits 3
and 7.
S16
0
Bit-mapped register setup. To set the register, see instructions for S13.
Bit
Value
Result
0
1
Reserved
1
2
Reserved
2
4
Touch tone test.
4
8
Use internal test pattern.
S18
0
Test timer for &T 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. Valid range is 1-255.
S19
0
Sets the duration, in minutes, for the inactivity timer. The timer activates when there is no data activity on
the phone line; at time-out the modem hangs up. S19 = 0 disables the timer.
S21
10
Sets the length, in 10-millisecond units, of breaks sent from the modem to the computer; applies to MNP
or V.42 mode only.
