C<Value>-Data Compression Control; E<Value>-Auto Fallback/Fallforward Control; C<Value>-Data Calling Tone - US Robotics 56 K SOFTMODEM - COMMAND REFERENCE REV 1 Command Reference Manual

%C<value>—Data Compression Control
Result codes:
Command
%C0
%C1
%C2
%C3
%E<value>—Auto Fallback/Fallforward Control
Result codes:
-C<value>—Data Calling Tone
blacklisted, failed, or delayed. The ERROR result code appears for countries that
do not support blacklisting.
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.
OK if <value> = 0—3.
ERROR if <value> does not equal 0—3.
Table 3-44: %C<value> Commands
V.42 bis/MNP 5 disabled. No data compression.
V.42 bis/MNP 5 enabled. Data compression enabled (default).
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.
OK if <value> = 0—2.
ERROR if <value> does not equal 0—2.
Table 3-45: %E<value> Commands
Command
%E0 Disables fallback/fallforward.
%E1 Enables fallback and disable fallforward.
%E2 Enables fallback/fallforward (default).
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.
Function
Function
56K Softmodem
Command Reference
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