Echo media, DTMF back to the calling party
Echos back any media or DTMF frames read from the calling channel back to itself. This will not echo CONTROL, MODEM, or NULL frames. Note: If '#' detected application exits.
This application does not automatically answer and should be preceeded by an application such as Answer() or Progress().
This documentation was imported from Asterisk Version SVN-branch-11-r379343