Rachel,
I don't have any experience utilizing dsp cards for off loading, and do
not personally have loads like this, our server usually has about 20 3
channel conferences running. From the freeswitch developers :
The conference is more resource intensive than normal bridging but the
general rule for media channels is about 190 channels (95 bridges) per 1
gigahertz of CPU on a 64 bit platform. If you don't need to run media into
FS you can bet on a lot more.
If you look at this thread you'll get some good information on it's
capabilities.
http://lists.freeswitch.org/pipermail/freeswitch-users/2008-May/003397.html
Mike
Rachel Quin wrote:
What you're saying is that if I have 20 active conferences, of 25 G.711
channels each, a generic two dual-core Xeon server can do all the mixing?
Four Xeon cores can mix that load, and do everything else? Wow, has anyone
got anything like that working? I would love to see it. I mean, our AS5400
fully loaded, with all the DSP card slots occupied, can only handle
assembling 675 DS0's. Even our Convedia media server is stuffed full of
DSPs.
Rachel
________________________________________
From: Mike Ashton [mailto:[email protected]]
Sent: February 27, 2009 11:32 AM
To: [email protected]
Subject: Re: [on-asterisk] Conference bridge
Rachel,
You could go down the road of using DSP cards but I'm not sure you really
need the complexity. What sort of capacity/features are you looking for?
When you say media mixing, do you mean things like:
-injecting background music, or a prerecorded audio stream into the
conference? If so FS can do it.
- adjust individual channel or the conference volume? yup
- background noise reduction? yup
I've heard of freeswitch handling 500 channels on a standard server box. It
has a full feature list. Even sipX is merging freeswitch in, starting with
conferencing.
http://sipx-wiki.calivia.com/index.php/Conferenceing_Service_for_sipXecs
SipX also has a gui front end to manage the freeswitch conference bridge, so
might be a easy way to test it out and it also offers an easy installer
which can also configure a high availability system.
http://sipx-wiki.calivia.com/index.php/CD_Installation_of_sipXecs
Mike
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
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