Toshiba M30 - Manual (Page 194)

User's Manual
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PPENDIX
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\Vn Protocol result code
\V0 Disable protocol result code appended to DCE speed.
\V1 Enable protocol result code appended to DCE speed (default).
Result Codes:
OK n=0,1
ERROR Otherwise
% B View numbers in blacklist
If blacklisting is in effect, this command displays the numbers for which
the last call attempted in the past two hours failed. The ERROR result
code appears in regions that do not require blacklisting.
%Cn Data compression control
This command determines the operation of V.42bis and MNP class 5
data compression. Online changes do not take effect until a disconnect
occurs first.
%C0 V.42bis/MNP 5 disabled. No data compression.
%C3 V.42bis/MNP 5 enabled. Data compression enabled (default).
Result Codes:
OK n=0,3
ERROR Otherwise