Hi Can I use Textops, to alter headers in a invite message? This is what I'm trying to do! search_append("P-Asserted-Identity: ", "<sip:"); search_append(" [0-9]\{8\}", "@sip.domian.com>"); Is this at all possible or should I try some other way? The data I want to add to the header is static. I'm using OpenSER 0.9.5 Thanks in advance Martin