What are the reasons for Asterisk to be in the media path? Why not direct calls to it specifically when some feature needs to be provided?
-- Sent from mobile device On Mar 16, 2009, at 11:23 PM, Juan Perez <jperezsip2...@yahoo.com> wrote: > > Alex, I understand your point and appreciate your input highly, but > let's say that asterisk is needed as the media server for other > reasons. It may not scale as well as the other solutions but we need > them to be there to provide other services. I just wanted to know > whether there was any difference aside from the scalabilty issue. > > We were under the impression that it was imperative to use either > media-proxy or rtp-proxy but after examining in more detail how the > 2 solutions work we find no reason not to use asterisk as the media > proxy as well. Unless of course we are missing the big picture here > and surely will find out once we set out to test it. But given the > deep knowledge of a lot of people in this forum we deemed necessary > to ask about the feasibility of this workaround. > If somebody detects any flaw on this solution or if there is > someting else critical or not that we are missing we would love to > hear it . > > thank you in advance and thank you Alex again, > jp > > > ----- Original Message ---- > From: Alex Balashov <abalas...@evaristesys.com> > To: Juan Perez <jperezsip2...@yahoo.com> > Sent: Monday, March 16, 2009 6:51:34 PM > Subject: Re: [Kamailio-Users] Using Asterisk as media server > > > No, because the amount of throughput you get per media/RTP proxy is > much > higher than you would get through something whose entire core is > structured > to behave as a PBX, with all the attendant features and latent event > loop > characteristics. A media relay does one thing and one thing only, > and it > does it well. Asterisk does many things, among them media relay. > > So, while you could use Asterisk in this capacity, I don't see the > point. > It'd be a waste of time. Also, you don't really want to get Asterisk > involved in the signaling layer (as a B2BUA) if you can help it. It > introduces unnecessary complexity and possible points of interop > problems > and failure. With a media relay that is controlled by API hooks into > Kamailio, you don't have that problem. > > On Mon, 16 Mar 2009 15:22:27 -0700 (PDT), Juan Perez > <jperezsip2...@yahoo.com> wrote: >> >> thanks alex, but actually there will be several asterisk servers, >> managed >> by the LCR module, that should be OK right? >> it should be the same as adding several media-proxies or rtp- >> proxies, am > I >> wrong? >> >> >> >> >> >> >> >> ----- Original Message ---- >> From: Alex Balashov <abalas...@evaristesys.com> >> To: Juan Perez <jperezsip2...@yahoo.com> >> Cc: users@lists.kamailio.org >> Sent: Monday, March 16, 2009 3:41:46 PM >> Subject: Re: [Kamailio-Users] Using Asterisk as media server >> >> No, nothing needs to be modified. >> >> However, in this scenario you are limited to Asterisk's performance >> characteristics in terms of the number of concurrent calls that can >> be >> handled. Just about any media relay will be much more scalable and >> lightweight. >> >> Asterisk is a PBX and a nice feature server. You don't build SIP >> service >> delivery platforms out of Asterisk used as a general-purpose call >> router. >> >> Juan Perez wrote: >> >>> Hello >>> >>> In this scenario, customers behind NAT register in kamailio, >>> records are >> stored in a db etc. Kamailio uses Asterisk boxes as gateways to send > calls >> to PSTN. >>> Is it possible to use Asterisk as the media server instead of >> media-proxy or rtp-proxy? >>> In this case the SDP that Asterisk sends in the 180 message needs >>> to me >> modified? >>> >>> thank you >>> jp >>> >>> >>> >>> >>> _______________________________________________ >>> Kamailio (OpenSER) - Users mailing list >>> Users@lists.kamailio.org >>> http://lists.kamailio.org/cgi-bin/mailman/listinfo/users >>> http://lists.openser-project.org/cgi-bin/mailman/listinfo/users >> >> >> -- Alex Balashov >> Evariste Systems >> Web : http://www.evaristesys.com/ >> Tel : (+1) (678) 954-0670 >> Direct : (+1) (678) 954-0671 >> Mobile : (+1) (678) 237-1775 > -- > Alex Balashov > Evariste Systems > Web : http://www.evaristesys.com/ > Tel : (+1) (678) 954-0670 > Direct : (+1) (678) 954-0671 > Mobile : (+1) (678) 237-1775 > > > > _______________________________________________ Kamailio (OpenSER) - Users mailing list Users@lists.kamailio.org http://lists.kamailio.org/cgi-bin/mailman/listinfo/users http://lists.openser-project.org/cgi-bin/mailman/listinfo/users
