Appendix: Error Correction and Data Compression
90
MicroLink 33.6TQV /
MicroLink 28.8TQV / MicroLink 14.4TQ
Manual © 1997 ELSA GmbH
B
Error Correction and Data Compression
AT%C
The two following tables provide an overview of the interdependencies
AT-J
between the
AT%C
,
AT-J
and
AT\N
commands which you use to configure
AT\N
your modem to error correction and data compression methods.
Example:
The default configuration for the modem is
AT%C3
,
AT -J1
and
AT \N3
. In
the upper table this configuration is described as case
4
. Column
4
of the
lower table shows the error correction and data compression methods
possible for this setting (connection with V.42bis, V.42, MNP5, MNP4 or
without protocol).
The arrows pointing down in the lower table denote a fallback if the
respective mode is not supported by the remote modem.
\N0
\N1
\N2
\N3
\N4
\N5
\N6
-J0
-J1
%C0
0
0
2
16
9
14
10
5
%C1
0
0
3
1
15
14
10
11
%C2
0
0
2
16
7
13
8
12
%C3
0
0
3
1
4
13
8
6
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16
V.42bis
â
â â â
â â
V.42
â â â â â â â â â n
n â
MNP 5
â
â â
â
â
â
MNP4
â n n â n n â
â
n
n
â â
physical
*)
n
n
n n n n
n
n
*)
Physical connection (AT\N0 in normal mode
or
AT\N1 in direct mode)