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AT Commands

AT command formats

%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.

%C1

V.42bis/MNP

5 enabled. Data compression

 

enabled (default).

Result Codes:

OK

n = 0, 1

ERROR Otherwise

-V.90=<n>

This command enables/disables V.90 and changes the downstream rate.

-V90=0 Disables V.90

-V90=1 Enables V.90 Auto rate (default value)

-V90=X Controls the downstream rate

-V90? Shows the current value

-V90=? Shows the range [0-21]

Possible values of n:

“AT-V90=X” Downstream Rate

0V.90 disabled

1Auto rate (Default)

228000 bps

329333 bps

430666 bps