Comtrol AT Command Set Rev A - Manual (Page 109)

AT Commands Reference Manual
100722B Conexant 3-83
Table 3-9. gstnModulationSchemeActive from 3.7.2/V.58
Value Description
0 V.17 (G3 Fax call)
1 V.21
2 V.22
3 V.22bis
4 V.23 Constant Carrier (1200/75)
8 V.27ter (G3 Fax call)
9 V.29 HD (G3 Fax call)
A V.32
B V.32bis
C V.34
E V.90 and V.92
81 K56flex 
84 Bell 212A
85 Bell 103
Table 3-10. errorControl Active from 3.5.2/V.58
Value Description
0 Disable/none
1 V.42 LAPM
2 V.42 Alternative protocol (MNP™)
80 MNP10™
Table 3-11. compressionActive from 3.2.2/V.58
Value Description
0 None
1 V.42bis and V.44
80 MNP5™