Hello all,   The HSS is responding with 604 errors when the I-CSCF checks the public identity of the caller.  PCAP attached.   It looks like our I-CSCF is modifying the sip uri’s to tel uri’s (e.164-like), referenced attached PCAP: in_uri=sip:alice@ims522.irisims.org out_uri=sip:+alice@ims522.irisims.org   syslog output: Jun  6 16:50:06 imskamailio /usr/local/sbin/kamailio[14066]: ERROR: <script>: $ru => sip:+alice@irisims.org   Looking at the default (out of the box) Kamailio.cfg for I-CSCF the following script snipet is where the modification to our sip URI is happening:   # -------------------------  request routing logic ------------------- # main routing logic   route{ #!ifdef WITH_DEBUG                 xlog("I-CSCF >>>>>>>>>>>>>>>>>>>> $rm $ru ($fu => $tu ($si:$sp) to $tu, $ci)\n"); #!endif   *                if !($rU =~ "\+.*") {* *                                prefix("+");*                 }   Is there a I-CSCF setting directive we missed? Or should we simply comment the above?   Any advice is appreciated.     Thanks, Martin Woscek _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users