Applies To



Calls do not complete, a 486 Busy Here message is returned.

Explanation of Behaviour

The destination was contacted successfully, but it is highly likely that the callee is busy/unavailable.

This messge may also appear if the PBX or Trunk service rejects the call due to a Caller ID mismatch.


Retry the call later or amend the From/PAI headers to match the requirements of the PBX/Trunk.