Hi Alex, I believe that statement goes back to me, but unfortunately, i was wrong. While Kamailio implements a lot of functionality to be OMA/RCS compliant, we are still missing some features. The best example is probably, that 3GPP standards request, that MSRP sessions are Store&Forward rather than direct requests (in the "Big yellow book on IMS" by Camarillo & others* it's stated, that you should use an MSRP-Relay; but that information is unfortunately outdated). But that's only one example from many. Also typical RCS-Clients do for example a partial update on XCAP Lists, which is afaik not supported by Kamailio (yet). A major vendor pointed out, that the SIP-Part of implementing RCS was not the biggest task, but rather the XCAP stuff... I (still) believe, if someone would put some effort into it, it could be achieved in reasonable time. Kamailio has all the necessary starting points to do so (MSRP-, XCAP-, SIP-Support), but we would have to go that extra mile. Kind regards, Carsten *) "The 3G IP Multimedia Subsystem (IMS): Merging the Internet and the Cellular Worlds" (by Gonzalo Camarillo & Miguel-Angel García-Martín; Wiley / 2008) 2015-01-15 23:58 GMT+02:00 Osbun, Alex <Alex.Osbun(a)interoptechnologies.com>om>: -- Carsten Bock CEO (Geschäftsführer) ng-voice GmbH Schomburgstr. 80 D-22767 Hamburg / Germany http://www.ng-voice.com mailto:carsten@ng-voice.com Office +49 40 5247593-0 Fax +49 40 5247593-99 Sitz der Gesellschaft: Hamburg Registergericht: Amtsgericht Hamburg, HRB 120189 Geschäftsführer: Carsten Bock Ust-ID: DE279344284 Hier finden Sie unsere handelsrechtlichen Pflichtangaben: http://www.ng-voice.com/imprint/