Addition of a new SIP Trunk Profile Option - SIP P-Assert Identity (PAI) "“SendBTNInPAI"
As a result of defect ENG-383346 there is a change in behavior with the addition of a new SIP Trunk Profile Options.
When a User sets their “Call Forward Always” (CFA) to an external number the SIP P-Assert Identity (PAI) by default is the original Caller’s ID:
The new SIP Trunk Profile option “SendBTNInPAI=1” will use the Billing Telephone Number (BTN) as the SIP P-Assert Identity (PAI):
Enabling the SIP Debugs on the trunk switch you can see P-Assert Identity (PAI):