For an IP-based trunk, I can prepend a value to the number being dialed by an Outbound Rule and things work. However.. that makes for some rather messy rules. I was trying to take something like "CalledNum" from http://www.3cx.com/blog/docs/voip-provider-template/ and set a custom parameter to my prepended string "and" that variable afterwards. The end result I "need" is for the INVITE from user part to be like firstname.lastname@example.org. What I get when putting allthebest123*$CalledNum as a custom item.. is the same thing. It doesn't expand that variable. How can I get that variable to expand.. so that instead of a bunch of wonky rules I can just prepend that prefix to numbers as this trunk invites calls? It has less to do with my situation, more to do with mashing a string and variable together as a custom value. Can it be done?