ADTRAN ISU 128 - Manual (Page 106)

Appendix A. AT Commands
61202.029L2-1 ISU 128 User Manual 91
Command Function
The following AT commands require that the optional V.34 modem board be installed:
V.34 Compression Options
%C0 No compression
%C1 Use MNP compression
%C2 Use V.42 bis compression
%C3 Use V.42 bis/MNP compression
V.34 Compression Block Size Options
\A0 MNP 64 byte blocks
\A1 MNP 128 byte blocks
\A2 MNP 192 byte blocks
\A3 MNP 256 byte blocks
V.34 Operational Mode Options
\N0 MNP Normal
\N1 MNP Direct
\N2 Reliable
\N3 Auto-reliable
\N4 Force LAPM
\N5 Force MNP