=1;
2 stop bits.
(1,0)
=0;
Even parity.
=1;
Odd parity.
=2;
No parity.
S16
Test status register, default = 0
=0;
No test in progress. (Default)
=1;
Analog loopback test in progress.
=2;
Reserved.
=3;
Local digital loopback test in progress.
=6;
Remote digital loopback test in progress.
=7;
Remote digital loopback with self-test in progress.
=8;
Analog loopback with self-test in progress.
S17
Bit-mapped register, default = 18
*In
(7,6)
=0;
AT command set.
=1;
V.25bis command set.
=2;
Dumb model
D
(5)
=0;
Normal dial
DR
=1;
Reverse dial, answer mode on line
*Pn
(4,3,2,1)
=0-15; Set leased line transmission power level. (See also
S35b3)
*Sn
(0)
=0;
Disable secondary channel.
=1;
Enable secondary channel. (See also S42b0)
S18
Same value format as S20. If non-zero, forces the modem to use the fixed baud rate
indicated by this value when answering. A value of zero disables this function.
S19
Modem connection mode, default=0
&Nn
=0;
Multi-Auto, auto negotiate highest possible link rate. ( ZyX
19200, ZyX 16800, V.32bis 14400/12000/7200, V.32 9600T/9600/7200T/4800, V.22bis
2400/1200, V.22 1200, BELL 212A 1200, V.17FAX 14400/12000/9600/7200, V.29FAX
9600/7200, V.27terFAX 4800/2400, cellular modes)
=1;
V.33
14400/12000.
=2;
V.33
12000.
=3;
V.32
9600T/9600/7200T/4800.
=4;
V.32
9600/7200T/4800.
=5;
V.32
4800.
=6;
V.29
9600.
=7;
V.29
7200.
=8;
V.29
4800.
=9;
V.27bis 4800.
=10;
V.27bis 2400.
=11;
V.26bis 2400.
=12;
V.23
1200/75.
=13;
V.23
600/75.
=14;
V.22bis
2400/1200.
=15;
V.22
1200.
=16;
V.21
300.
=17;
V.32bis 14400/12000/9600/7200/4800.
=18;
V.32bis 12000/9600/7200/4800.
=19;
V.32bis 7200/4800.
=24;
Bell 212A
1200.
=25;
Bell 103
300.