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
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