User`s guide

TECHNICAL REFERENCE
79
Register Default Function
S15 (Continued) Bit Value Result
3 8 Disable MNP handshake
4 16 Disable MNP level 4
5 32 Disable MNP level 3
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. (S15=136{the sum of
values 8 and 128})
S16 0 Reserved
S17 0 Reserved
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
S20 0 Reserved
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