I'll dig through the dox to see if it can do things other than codec conversion. The funny thing is that I use a UA DSP card to digital audio mixing and effects for music, and there is a tonne of software to support it.
We've spent over half a million dollars so far on our voice infrastructure, and it is "big iron", but beginner's "big iron". I'd like to build more agile system, so we can put hardware closer to the customers. I've already started designing integrating vmail, email, fax, IM, into a multimode communications storage front end (we are so not a M$ shop here ;^). And this will be a fun one, but I'd really like to do conferencing as well. -----Original Message----- From: Philip Mullis [mailto:[email protected]] Sent: February 27, 2009 12:24 PM To: Rachel Quin Cc: [email protected] Subject: Re: [on-asterisk] Conference bridge since this is a zaptel card, it will do channel bridging and offload the dsp operations to the card from what ive been told. your probably best to pick one up for testing in house at this point :) Rachel Quin wrote: > Ok, almost there, but not quite. I don't want to do dedicated codec > conversion. In fact, we will never use anything other than G.711. I'm > looking for a more generic DSP card that can be used to do all the channel > mixing, offloading the work from the server's processors. And!! The > software that can utilize it. I can find the cards easy enough, there are > quite a few to choose from, but of the OSS, I know not. > > To quote from the Digium page: These transformations in software are very > expensive, in terms of MIPS, and require a substantial amount of CPU time to > accomplish. > > Channel mixing also quite expensive, when you're talking about the high > hundreds of channels. > > Rachel > > -----Original Message----- > From: Philip Mullis [mailto:[email protected]] > Sent: February 27, 2009 12:04 PM > To: Rachel Quin > Cc: [email protected] > Subject: Re: [on-asterisk] Conference bridge > > gotcha, in that case take a gander at the digium tc400b card, that > handles dsp offloading for asterisk and also acts as a transcoding > accelerator. > > > > > > 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 >> >> >> > > > 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. 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