Execute a periodic dialplan hook into the audio of a call.
For example, you could use this function to enable playing a periodic
beep sound in a call.
It is important to note that the hook does not actually run on the channel itself. It runs asynchronously on a new channel. Any audio generated by the hook gets injected into the call for the channel PERIODIC_HOOK() was set on.
The hook dialplan will have two variables available.
HOOK_CHANNEL is the channel the hook is enabled on.
HOOK_ID is the hook ID for enabling or disabling the hook.
context- (On Read Only) Context for the hook extension.
extension- (On Read Only) The hook extension.
interval- (On Read Only) Number of seconds in between hook runs. Whole seconds only.
hook_id- (On Write Only) The hook ID.
This documentation was imported from Asterisk Version GIT-19-6436d82