FreePBX provides several clever ways to terminate calls. We may wish to terminate a call because the calling number is a known telemarketer, or perhaps the caller has attempted to reach an invalid extension too many times. Whichever the case, the following options are available for the Terminate Call target:
Hangup: Terminates the call immediately without any further call processing or signaling.
Congestion: Sends a signal indicating that there are no channels available to complete the call before terminating it. This is used only for digital channels (such as SIP, IAX, or PRI). Some providers will use this signal to locate an alternate route or process the call in another way.
Busy: Relays a busy tone to the caller. The call terminates when the calling party hangs up (FreePBX will play a busy tone indefinitely).
Play SIT Tone (Zapateller): Plays a SIT known as an operator intercept to the calling party. An operator intercept tone consists of two short tones and one...