Matrix ETERNITY NE System Manual 837
• If none of the landing extensions answers the call before the expiry of the DID Inactivity Timer, the system 
plays the Trunk Auto Answer Busy Bye message and releases the trunk port.
If no Trunk Auto Answer Busy Bye message is assigned, the system plays the Busy Tone for the duration 
of the Busy Tone Timer and releases the trunk port.
When Trunk Auto Answer–When Busy is enabled on a CO, Mobile or SIP Trunk, for each incoming call on the 
trunk, 
• The System answers the with the Trunk Auto Answer Greeting message and loads the DID Inactivity 
Timer. 
The Greeting message is played once.
• The System waits for any of the landing destinations (Operator or Extensions) selected for the time of the 
day to be free.
• If no landing destination is free at the end of the Trunk Auto Answer Greeting message, the system plays 
Ring Back Tone or Trunk Auto Answer Ring Back Tone message, if assigned, to the caller for the duration 
of the DID Inactivity Timer.
• If any of the landing destinations is free before the expiry of the DID Inactivity Timer, the system places the 
call on that destination.
• If none of the landing destinations is free at the end of the DID Inactivity Timer, the system plays the Trunk 
Auto Answer Busy Bye message, if assigned, and releases the trunk port.
If the Busy Bye message is not assigned, the system will play the Busy Tone to the caller for the duration 
of the Busy Tone Timer.
How to configure
For this feature to work, you must do the following:
1. Enable Trunk Auto Answer on the CO Trunk, Mobile, SIP trunk, as required. 
• Under Basic Settings, open the links to the desired trunk port type.