Hello, So I found this page which shows how to remove custom SIP headers by using the unset application and passing in the custom header name prefixed by sip_h_[HEADER]. Is there a configuration setting which can be set to disallow custom headers being copied when bridging calls? The scenario is as following; 1) Each call is going through a Kamailio SIP Proxy first, which adds some custom headers. 2) Kamailio routes the INVITE to one of our FS SBC's. 3) FS bridges the call to the carrier. When FS creates a new call leg towards the carrier, I would expect it to NOT copy the custom headers added by Kamailio, but it does. This is my dialplan: <extension name="internal_to_external"> <condition field="${sip_req_host}" expression="^10\.0\.0\.1$"> <action application="set" data="hangup_after_bridge=false"/> <action application="set" data="continue_on_fail=true"/> <action application="privacy" data="full"/> <action application="set" data="sip_h_Privacy=id"/> <action application="set" data="privacy=yes"/> <action application="bridge" data="sofia/external/${sip_req_uri}"/> </condition> </extension> Did I configure something wrong, or is this just normal behavior?