56K Softmodem
Command Reference
- 31
blacklisted, failed, or delayed. The
ERROR
result code appears for countries that
do not support blacklisting.
%C<value>—Data Compression Control
Use this command to enable or disable V.42
bis
and
MNP
class 5 data
compression. On-line changes do not take effect until a disconnect occurs.
Result codes:
OK
if <value> = 0—3.
ERROR
if <value> does not equal 0—3.
Table 3-44: %C<value> Commands
%E<value>—Auto Fallback/Fallforward Control
This command provides the option for the modem to automatically monitor line
quality, to fall back when line quality is insufficient, and to fall forward when line
quality is sufficient.
Result codes:
OK
if <value> = 0—2.
ERROR
if <value> does not equal 0—2.
Table 3-45: %E<value> Commands
-C<value>—Data Calling Tone
Use this command to enable or disable the data calling tone after a call is
originated. The data calling tone is a tone of a certain frequency and cadence
as specified in V.25, which allows remote data/FAX/voice discrimination. The
frequency is 1300 Hz with a cadence of 0.5 s on and 2.0 s off.
Command Function
%C0 V.42
bis/
MNP
5 disabled. No data compression.
%C1 V.42
bis/
MNP
5 enabled. Data compression enabled (default).
%C2
%C3
Command Function
%E0 Disables
fallback/fallforward.
%E1
Enables fallback and disable fallforward.
%E2
Enables fallback/fallforward (default).
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