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Appendices
AT- (Dash) Commands

Command Options Function & Description

-Jn Set V.42 detection phase
-J0 Disable V.42 detection phase
-J1 * Enable V.42 detection phase
-V Display firmware version number
“Hn V.42bis compression control
“H0 Disable V.42bis
“H1 Enable V.42bis only when transmitting
data
“H2 Enable V.42bis only when receiving
data
“H3 * Enable V.42bis for both transmitting
and receiving directions
* Factory default setting