[Serusers] Inserting SER into my voice network

[Mark Aiken]

Ray,
 Jitter buffers in VoIP are only of use at the point where the packets are
converted into the final PCM bit stream - a TDM or DAC interface in most
cases.
 The problem with your proposed solution is that the output of mediaproxy,
even if it is de-jittered, will be subject to jitter once again on the way
to the endpoint where the packet connection is converted to voice.
 Mark


 On 9/21/05, Ray Van Dolson <rayvd at digitalpath.net> wrote:
>
> First off, here is my voice network layout currently:
>
> http://webdev.digitalpath.net/~rayvd/voice/voice_network2.png
>
> We're using Asterisk for voicemail, call routing (for long-distance, LNP,
> etc)
> and SER/rtpproxy at the other end which handles NAT onto private networks
> where customer's exist.
>
> This setup works fairly well for the most part, except that Asterisk does
> not
> have a jitter buffer. I would like to make use of rtpproxy (or mediaproxy)
> for their jitter buffer on both ends of our voice links here. To me, that
> would mean shoving a SER/rtpproxy combo between Asterisk and our provider
> network. Possibly on the same server.
>
> I could easily throw up a SER installation, but I'm trying to figure out
> if
> there's any way to leave Asterisk in the SIP path but remove it from the
> media
> path (have RTP just go straight from SER/rtpproxy to my provider's RTP
> proxy).
>
> Have any of you set up a scenario somewhat like this? Any recommendations?
> Asterisk CVS-HEAD does let you apply a patch and get some very alpha
> jitter
> buffer support. But CVS HEAD doesn't work reliably for me at all currently
> so
> I'm sticking with the latest stable release of 1.0.x series.
>
> I'm running SER 0.9.3 FYI on the SER proxies I have set up currently.
>
> Thanks.
>
> --
> Ray Van Dolson
> Linux/Unix Systems Administrator
> Digital Path, Inc.
>
> _______________________________________________
> Serusers mailing list
> serusers at lists.iptel.org
> http://lists.iptel.org/mailman/listinfo/serusers
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.sip-router.org/pipermail/sr-users/attachments/20050922/b15cc88d/attachment.htm>