Please ignore previous post which I sent before completing! I have two problems: 1. A 2nd Remote-Party-ID header gets appended when I try to do two subst() on it. 2. Xlog seems to only have a ref to the orignal unedited rpid header. I am attempting to clean up my Remote-Party-ID header so that my Polycom UAs will display the incoming number as a number rather than as a URI. This requires the domain to match that of the UA's server (e.g. siptest.columbia.edu). And, I want to rewrite incoming calling numbers from my PBX to be in 5-digit format and other US 10-digit numbers into proper E.164 format since my PBX and at least one of my ITSPs doesn't provide them as E.164. So, I do a couple of subst() operations on INVITEs. What's wierd is that one Remote-Party-ID header becomes two when it gets to the UA. The call flow is: INVITE r-uri <sip:10508@128.59.59.96:5060> from <sip:9174147124@128.59.59.242> With the original RPID header as: Remote-Party-ID: <sip:9174147124@128.59.59.242> And after route[10] the headers that end up on the UA are: Remote-Party-ID: <sip:9174147124@siptest.columbia.edu> Remote-Party-ID: <sip:+19174147124@128.59.59.242> It looks like the 2nd subst() happened against the original RPID, not the edited one and somehow two RPID headers got created. Here's the code for the route block: route[10] { xlog("L_INFO","route[10] $ci: method $rm r-uri <$ru> from <$fu> rpid <$re>\n"); # first just clean out the domain name subst('/^(Remote-Party-ID:.*<sip:.*)@.*>(.*)$/\1@siptest.columbia.edu>\2/'); # now strip our numbers down to 5 digits subst('/^(Remote-Party-ID:.*<sip:)(\+)?(1)?21285([134][0-9]{4})@/\1\2/'); # expand 10-digit NANP numbers to E.164 subst('/^(Remote-Party-ID:.*<sip:)([0-9]{10}.*$)/\1+1\2/'); # ??? xlog doesn't show the result of rewriting it. # xlog("L_INFO","route[10] RPID is now <$re>\n"); xlog("L_INFO","route[10] $ci: RPID was rewritten.\n"); return; } #end of route[10] Any help with this would be greatly appreciated! /a