Re: [SR-Users] Kamailio - RTPProxy - Asymmetric RTP

Yes Daniel, you are right. Thats behavior is supposed to be Asymmetric RTP? Because I can not find definitions about which ports should be used. On Thu, 2013-10-31 at 16:18 +0100, Daniel Grotti wrote: > Hi Girard, > > looks like the Provider are sending RTP from port 5392 instead of 5394 > as in SDP, rtpproxy send traffic to 5392 as well. > > > Daniel > > > > > On 10/31/2013 04:13 PM, Lucas Girard wrote: > > Hi all, > > I have an issue with a Kamailio and rtpProxy, when Asymmetric RTP is used. > > > > I have the system running, lines registered in Kamailio are able to call > > to several destinations, but I have a problem with one provider that use > > Asymmetric RTP (others providers use Symmetric RTP and I dont have any > > issues). > > > > A -----> Kamailio & RTPProxy ----------> Trunk -------> Provider > > (Asymmetric RTP) -------> B > > > > A is calling B. > > The problem is that line in kamailio A can listen to B, but B can not > > listen what A says. > > > > I have captured the sip dialog and rtp traffic and I can see that: > > > > Kamailio tells to provider that is using the port 52388 (media port in SDP). > > Providers tells Kamailio that is using the port 5394 (media port in SDP). > > RTP traffic from Providers to kamailio goes from port 5392 to 52388. > > RTP traffic from Kamailio to Provider goes from port 52388 to 5392. > > > > > > I have not found an RFC regarding Asymmetric RTP. The question are, > > why RTP is sent from Kamailio (rtpproxy) to Provider to destination port > > 5392? > > It should use 5394 as SDP indicate? > > or, port 5392 is learned when RTP traffic was received from 5392 to 52388? > > > > > > /# kamailio -V/ > > /version: kamailio //*3.3.0 (i386/linux)*/ > > /flags: STATS: Off, USE_IPV6, USE_TCP, USE_TLS, TLS_HOOKS, > > USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, > > PKG_MALLOC, F_MALLOC, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, > > USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES/ > > /ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, > > MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 4MB/ > > /poll method support: poll, epoll_lt, epoll_et, sigio_rt, select./ > > /id: unknown/ > > /compiled on 22:17:07 Jun 18 2012 with gcc 4.4.5/ > > > > /# rtpproxy -v/ > > */Basic version: 20040107/* > > /Extension 20050322: Support for multiple RTP streams and MOH/ > > /Extension 20060704: Support for extra parameter in the V command/ > > /Extension 20071116: Support for RTP re-packetization/ > > /Extension 20071218: Support for forking (copying) RTP stream/ > > /Extension 20080403: Support for RTP statistics querying/ > > /Extension 20081102: Support for setting codecs in the update/lookup > > command/ > > /Extension 20081224: Support for session timeout notifications/ > > > > > > I hope to be clear with this explanation. > > > > Regards, > > > > Lucas Girard > > > > > > > > > > > > > > _______________________________________________ > > SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list > > sr-users(a)lists.sip-router.org > > http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users > > > > _______________________________________________ > SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list > sr-users(a)lists.sip-router.org > http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users