One of my SIP providers has a requirement that as part of there authentication that I either use a tgrp, or set the PAI of each outbound call to the number i am registered as.
I ‘assume’ I could use [macro-dialout-trunk-predial-hook] to set the PAI to the required value - however I only want to set this for calls on this particular trunk; and the macro-dialout is applied to all outbound calls.