[SR-Users] Add Header

Hi, customers PBX----trunk-----kamailio------------freeswitch-------------carrier We already add Trusted IP’s via SIREMIS 4.0 is it possible with Kamailio to have customers calls come in on a trusted IP and when they send calls we add a header with a [client id] which we can remove on the next ip switch upstream So example Call comes in from customer with IP: their trusted IP source xx.xx.xx.xx add header with their client ID route to PSTN Then my upstream switch will process the customers call and remove the header before sending to our voip carrier. Basically my ip switch will evaluate the client id header for billing, process and strip the header back out. Thanks Tony