Hello Tihomir, Kamailio as a flexible solution supports common SIP standards out of the box and can be also tailored to adapt to different other (SIP) standards. I am not aware of a dedicated 3GPP compliance list. On kamailio.org there is a list of supported RFCs: https://www.kamailio.org/w/interoperability/ Many of the Kamailio IMS functionality originate from OpenIMSCore, with different modifications. Not sure if maybe this project maintained such a list in the past. Cheers, Henning Am 14.09.19 um 21:34 schrieb Tihomir Culjaga: Hi, is there any 3GPP compliance list for Kamailio IMS ? Regards, Tihomir. _______________________________________________ Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org<mailto:sr-users@lists.kamailio.org> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users -- Kamailio Merchandising - https://skalatan.de/merchandising/ Kamailio services - https://skalatan.de/services Henning Westerholt - https://skalatan.de/blog/