Re: [OpenSER-Users] RTP-Proxy

On Thu, 2008-01-10 at 18:06 +0100, Iñaki Baz Castillo wrote: I don't agree. This is a myth if you ask me. The only proper way to garantee that an UAC is still alive is to make sure it is responsive to signaling. What you care about in that context is signaling (BYE _is_ signaling). RTP detection can help, but I consider this an ugly workaround when used alone. What happens when someone hit the "secret" key on his phone with blank compressions enabled and go get a coffee cup ? What happens for SIP sessions without RTP ? Or one-way RTP only ? Also, when your installations gets serious, you have MANY situations where you want to optimize RTP path. Sometimes you want to avoid RTP proxying completely. To summarize, I'd say that if you rely on RTP detection for billing, then you have the following limitations : - unreliable problem detection - stuck with RTP proxying for ALL calls - problems with VAD - problems in corner cases with re INVITES changing the RTP stream extremities What do you think ? BTW, I work for a telco, so YMMV. In a setup with only one or two million minutes per month, well I supose this might be a different story. Regards, -- Jérôme Martin | LongPhone Responsable Architecture Réseau 122, rue la Boetie | 75008 Paris Tel : +33 (0)1 56 26 28 44 Fax : +33 (0)1 56 26 28 45 Mail : jmartin(a)longphone.fr Web : www.longphone.com <http://www.longphone.com>