I have multiple DID's configured on my 3CX system. I need for some of them to send the caller-id specific to that extension instead of the pilot number configured on the callcentric trunk extension. I am using 3CX PBX Version 15.5.5. My VoIP trunk is a callcentric trunk with caller-id set to the primary business DID My 3CX outbound parameters have been set as requested by Callcentric: P-Asserted Identity : User Part - “OutboundCallerId” P-Asserted Identity : Host Part - “OutHostPort” The problem seems to be limited to a couple of analog extensions hanging off Cisco SPA122's The SPA122s register just fine, inbound and outbound calling works fine. I just can't figure out how to make the correct caller-id pass from those extensions. Any ideas?