asterisk users - Jun 2013 - Dial-App / Feature Disconnect

Hi,

I configured in features.conf, that the Dial-App may be cancelled by 
pressing the pound key. That works fine. The caller can cancel the 
bridged call. BUT can I configure it that way, that the dialing itself 
can NOT be cancelled? "My" dial should only be cancelled by the
timeout
or by the gangup of the caller.

Asterisk 11.3.0

Best regards,
-Thorsten-