Comtrol AT Commands - Manual (Page 103)

AT Commands for CX81801/CX06833/CX81300/CX06827 Modems Reference Manual
102184B Conexant 3-77
%C - Enable/Disable Data Compression
Enables or disables data compression negotiation. The modem can only perform data
compression on an error corrected link. The parameter value, if valid, is written to S41
bits 0 and 1.
Syntax
%C<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0 Disables data compression. Resets S46 bit 1.
1 Enables MNP 5 data compression negotiation.
Resets S46 bit 1.
2 Enables V.42 bis data compression. Sets S46
bit 1.
3 Enables both V.42 bis and MNP 5 data
compression. Sets S46 bit 1. (Default.)
Result Codes
OK <value> = 0, 1, 2, or 3.
ERROR Otherwise.