That, I would like to see! Our existing system supports 3 party conferencing just fine, but when I start looking at 20-30 party conferences, with 20-30 concurrent conferences, I really, really have a hard time believing that even two quad-core 64bit Xeons are going to handle the load of real-time mixing of 64kbit streams, doing the AGC, cleanly, without jitter, without artefacts, telco quality sound, and still handle all the rest of the systems load.
-----Original Message----- From: Simon P. Ditner [mailto:[email protected]] Sent: February 27, 2009 12:17 PM To: [email protected] Subject: RE: [on-asterisk] Conference bridge Would anyone like to get scientific about it? I'm now really curious to know how many G.711 channels a quad core Xeon could mix using Asterisk, FreeSWITCH, and YATE respectively. Does anyone have a spare available that we might run some automated testing against? And if we're feeling really sick, we could also do some MOS tests (Mean Opinion Score); the test is outlined in ITU P.800: http://www.itu.int/rec/T-REC-P.800-199608-I/en Cheers, spd -- | It ain't what you don't know that gets you into trouble. It's what | you know for sure that just ain't so. -- Mark Twain | | Network: http://www.linkedin.com/in/spditner | http://facebook.com/people/Simon-P-Ditner/776370031 | http://twitter.com/spditner On Fri, 27 Feb 2009, Rachel Quin wrote: > No, that flexibility is exactly what I'm looking for, but you simply can't > mix that many G.711 channels in Xeon cores. > > My question is, does anyone know of any open source software that will > utilize DSP cards for the actual voice stream crunching of G.711 channels? > All of the signalling and management function would be in the software > running on the host hardware. Every Telco grade media mixer does this, > every edge T3 or OC gateway. > > Can FreeSwitch or Asterisk do all the conferencing work, using DSP hardware > offloading? > > Rachel > > ________________________________________ > From: Mike Ashton [mailto:[email protected]] > Sent: February 27, 2009 12:03 PM > Cc: [email protected] > Subject: Re: [on-asterisk] Conference bridge > > Rachel, > > I think you may have a misconception of what Asterisk ad/or FreeSwitch are. > They are really telephony/media software platforms that can be configured to > do many things. The most frequent uses are as full blown PBX phone systems, > but they can be used strictly as, a VM platform, an IVR application server, > media gateways, etc..... > > Mike > > Rachel Quin wrote: > I think I'm not making myself clear, sorry. Our t3's and Megalink circuit > from Bell come into AS5400's. Our VoIP infrastructure is entirely SIP. A > conferencing server would only handle RTP streams, mixing channels for many > large-ish volume conferences. The box I'm talking about would have 2 10gig > nics, one or two DSP cards, and whatever software is needed to handle > managing conferencing and directing RTP/G.711 content channels to and from > the DSP card(s). I am not looking to build a stand alone phone system. > > Rachel > > -----Original Message----- > From: Philip Mullis [mailto:[email protected]] > Sent: February 27, 2009 11:21 AM > To: Rachel Quin > Cc: [email protected] > Subject: Re: [on-asterisk] Conference bridge > > asterisk does work well and you can stick 2 cards (8 pris worth of cards > to a beefy server) but really no more. > for larger scale conferencing on a single box you really need something > larger. > > > Rachel Quin wrote: > > Really all I'm looking at is media mixing for call conferencing, I have > > all > > the other puzzle pieces. > > Rachel > > -----Original Message----- > From: Philip Mullis [mailto:[email protected]] > Sent: February 27, 2009 10:44 AM > To: Rachel Quin > Cc: [email protected] > Subject: Re: [on-asterisk] Conference bridge > > Have you looked into Metaswitch? > > > Rachel Quin wrote: > > > I'd actually like to reintroduce my question. I'll start with some > background: > > > > Beanfield Metroconnect is a dark-fibre, lan-ex, and Internet provider for > office buildings in the downtown core. We have an extensive 10gig > > > backbone, > > > two large pops and datacenters in Toronto, and one in NY NY. We own the > fibre end to end in our core, and we offer business services exclusively. > > > > We are just branching into voice services, and our initial setup is the > following: we're fully redundant with each site having Sylantro for > switching, Convedia media mixers, AS5400-t3 links to Bell, Bell Megalink > circuits for wholesale long distance, top end BSCs, and currently Iperia > > > for > > > vmail (though I'd like to build my own solution for that). > > > > I'd like to offer conferencing services, but we can't do anything > > > completely > > > amateur hour. I've heard of someone using four dual core Xeon to process > 180 channels, and I had a nice little chuckle ;^) > > > > In thinking back over the problem, I guess I have to look at the actual > > > DSP > > > cards, Sharks, TI's, and see what I like, but does anyone have any > experience with any open source software using DSP offload cards? At > > this > > juncture I'm more worried about H/W support than features. I'll probably > > > be > > > looking at a 16 or 32 core DSP card, but as I said, I've got to do some > shopping. > > > > Any thoughts, suggestions? > > > > Rachel Quin > > Beanfield Metroconnect > > > > audace fortuna iuvat > > > > _____ > > From: Mike Ashton [mailto:[email protected]] > Sent: February 27, 2009 9:23 AM > Cc: [email protected] > Subject: Re: [on-asterisk] Conference bridge > > > > Rachel, > > In my opinion freeswitch has the best base conference bride features, no > dependency on hardware or the ztdummy timer and loads more features. For > > a > > comparison of the FS & Asterisk features here is link to a comparison > http://www.freeswitch.org/node/100 > > Also here is a small article ( > > > > http://www.junctionnetworks.com/blog/charlotte/2008/05/21/freeswitch-asteris > > > > k-replacement ) and their rational of picking FS over Asterisk for their > conference bridge product. > > Hope this helps, > > Mike > > Rachel Quin wrote: > > I want to build a conference bridge using dedicated DSP hardware, running > > > on > > > FreeBSD. Does anyone have recomendations on HW/SW? > > Rachel Quin > Beanfield Metroconnect > > audace fortuna iuvat > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > > > > > > > > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 8.0.237 / Virus Database: 270.11.3/1971 - Release Date: 02/27/09 > 07:05:00 > > > > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 8.0.237 / Virus Database: 270.11.3/1971 - Release Date: 02/27/09 > 07:05:00 > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > > > > > > -- > Mike Ashton > > Quality Track Intl > CTO > Ph: 647-724-3500 x 301 > Cell: 416-527-4995 > Fax: 416-352-6043 > > QTI CONFIDENTIAL AND PROPRIETARY INFORMATION > > The contents of this material are confidential and proprietary to Quality > Track International, Inc. > and may not be reproduced, disclosed, distributed or used without the > express permission of an authorized representative of QTI. > Use for any purpose or in any manner other than that expressly authorized is > prohibited. > If you have received this communication in error, please immediately delete > it and all copies, and promptly notify the sender. > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > > --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected] No virus found in this incoming message. 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