Applies To
Customers
Issue
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.
Advice
Retry the call later or amend the From/PAI headers to match the requirements of the PBX/Trunk.