Play Music On Hold indefinitely.
Plays hold music specified by class. If omitted, the default music source for the channel will be used. Change the default class with Set(CHANNEL(musicclass)=...). If duration is given, hold music will be played specified number of seconds. If duration is omitted, music plays indefinitely. Returns
0 when done,
-1 on hangup.
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 GIT-18-c0fafa1