Answer a channel if ringing.
If the call has not been answered, this application will answer it. Otherwise, it has no effect on the call.
delay- Asterisk will wait this number of milliseconds before returning to the dialplan after answering the call.
nocdr- Asterisk will send an answer signal to the calling phone, but will not set the disposition or answer time in the CDR for this call.
This documentation was imported from Asterisk Version SVN-branch-10-r378689