User`s manual

U.S. Robotics I-modem Command Reference
Controlling Result Code Displays • Page 5-11
&A3 Default. Display error control (LAPM, HST, MNP, SYNC, V120, or
NONE) and data- compression type (V42BIS, MNP5) indicators.
In the following example, the devices negotiated error control for the call
(ARQ), used V.34 modulation, are using the LAPM error-control protocol
,
and are using V.42bis compression.
CONNECT 28800/ARQ/V34/LAPM/V42BIS
Note The numeric identiÞers for &A3 result codes are the same as those used for
&A2. If you request numeric display (V0) and &A3, you wonÕt be able to
distinguish &A2 from &A3 codes. Also, &A3 result codes may not be
compatible with some software.