[sr-dev] [kamailio/kamailio] SCSCF failing to send INVITE to application server. (Issue #3015)

We are trying to test private VoLTE setup with real UEs using open5gs EPC , kamailio IMS and application server. We see INVITE request reaching till term-SCSCF with URL (sip:405874000000955@ims.mnc874.mcc405.3gppnetwork.org;user=phone) but it is not forwarding request to application server. SCSCF is trying to fetch IMPU record for application server with tel uri even though it receives SIP uri in INVITE message. Hence fails to reach application server. Could anyone help us on why 'isc_match_filter()' function is returning tel uri even though it is receiving sip uri in message? Attaching log and pcap for reference. #### SCSCF logs scscf |  3(34) DEBUG: ims_isc [ims_isc_mod.c:253]: isc_match_filter(): Starting triggering scscf |  3(34) DEBUG: ims_isc [ims_isc_mod.c:323]: isc_match_filter(): Checking if ISC is for originating user scscf |  3(34) DEBUG: ims_isc [ims_isc_mod.c:362]: isc_match_filter(): Checking if ISC is for terminating user scscf |  3(34) DEBUG: ims_isc [ims_isc_mod.c:372]: isc_match_filter(): ISC is for Term user scscf |  3(34) DEBUG: ims_isc [checker.c:586]: isc_is_registered(): Searching in usrloc scscf |  3(34) DEBUG: ims_isc [checker.c:589]: isc_is_registered(): no record exists for [tel:405874000000955] scscf |  3(34) DEBUG: ims_isc [ims_isc_mod.c:380]: isc_match_filter(): Term User <tel:405874000000955> [0] scscf |  3(34) DEBUG: ims_isc [ims_isc_mod.c:383]: isc_match_filter(): Checking if RURI has changed...comparing: <> and <tel:405874000000955> scscf |  3(34) DEBUG: ims_isc [ims_isc_mod.c:390]: isc_match_filter(): Resuming triggering scscf |  3(34) DEBUG: ims_isc [checker.c:586]: isc_is_registered(): Searching in usrloc scscf |  3(34) DEBUG: ims_isc [checker.c:589]: isc_is_registered(): no record exists for [tel:405874000000955] scscf |  3(34) DEBUG: ims_isc [checker.c:431]: isc_checker_find(): isc_checker_find: starting search scscf |  3(34) ERROR: ims_isc [checker.c:448]: isc_checker_find(): Failure getting IMPU record for [tel:405874000000955] - ISC checker find METHOD: [INVITE] [open5gs_test67.zip](https://github.com/kamailio/kamailio/files/7979412/open… -- Reply to this email directly or view it on GitHub: https://github.com/kamailio/kamailio/issues/3015 You are receiving this because you are subscribed to this thread. Message ID: &lt;kamailio/kamailio/issues/3015(a)github.com&gt;