Dialogic M7324 - page 80

Dialogic® PBX Integration Board User’s Guide
Aborting a Transfer
A transferred call can be aborted at any time (prior to completing the transfer)
by pressing the OptiGuide key. The application can perform this only in a
supervised transfer mode. Abort the transfer using dx_dial(<ESC>KM),
which presses the OptiGuide key. This brings the original caller back to an
active state.
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