[asterisk-users] Where is the Digium DS3 card?

[Steve Totaro]

Should have read, "I cannot recommend the Atran MX2800 M13 *enough*"

Two controller cards, two power supplies, battery backup, this is a
nice little box.

It will probably be the most solid piece of equipment in your data center.

Thanks,
Steve Tototaro

On Sun, Apr 6, 2008 at 11:12 AM, Steve Totaro
<stotaro at totarotechnologies.com> wrote:
> I cannot recommend the Adtran MX2800 M13, it has redundant everything
>  and is very easy to setup and not very expensive either.
>
>  Thanks,
>  Steve Totaro
>
>
>
>  On Sun, Apr 6, 2008 at 11:04 AM, Michael Cargile <viciastdump at gmail.com> wrote:
>  > Another reason I am sure that Digium has not released a DS3 TDM card is the
>  > fact that asterisk currently cannot handle that many channels. I am speaking
>  > from experience on this. We have build before a predictive dialer with 16
>  > PRIs. In order to do this and not have audio quality issues we had to use an
>  > 8 core Intel Xeon server with 16 gigs of ram, a 6 drive RAID 10, and two
>  > octal echo canceling Sangoma cards. This also required numerous OS tweaks
>  > and dial plan optimizations. The amount of time spend on this was not worth
>  > the final product.
>  >
>  > This is not to say that Asterisk will not be able to support this in the
>  > future. In the 1.6 tree, they have change a number of core data structures
>  > and the type of locking used around them which should allow far more
>  > channels to pass through Asterisk with much lower load. I would not even
>  > attempt this though till somewhere around the 1.6.5 release so that the vast
>  > majority of the bugs can be worked out.
>  >
>  > In the mean time, if someone really needs to handle that many channels I
>  > would suggest purchasing a DS3 to T1 mux and pass the T1s onto mutliple
>  > Asterisk servers setup in a cluster. In the end you will end up spending far
>  > less money and time setting the system up. I also saw recently at a trade
>  > show a DS3 to SIP converter which might also lower the cost as you would not
>  > need T1 cards. The only issue is that they are a some what new technology
>  > where as DS3 to T1 muxes have been around for some years now and can be
>  > found on ebay for around 700 dollars.
>  >
>  > Michael Cargile
>  > Director of Consulting
>  > The Vicidial Group
>  > www.vicidial.com
>  >
>  >
>  >
>  >
>  > On Sun, Apr 6, 2008 at 9:55 AM, Jay R. Ashworth <jra at baylink.com> wrote:
>  >
>  > > On Sun, Apr 06, 2008 at 05:37:03AM -0400, Steve Totaro wrote:
>  > > > > There was a fundamental problem with the chipset used, which precluded
>  > the
>  > > > > card from being useful.  Specifically, the chipset only permitted the
>  > first
>  > > > > 255 channels to be addressed (instead of the full 672).  Since that
>  > time,
>  > > > > and
>  > > > > partly due to this circumstance, Digium no longer announces the
>  > release of
>  > > > > cards until they are ready to be shipped, with drivers and all.
>  > > > >
>  > > > Would that be 254?  Seems like 254 is always the cap.
>  > >
>  > > I would bet cash that it's 256 channels, numbered 0-255.
>  > >
>  > > The limit is 8 bits of address.
>  > >
>  > > Cheers,
>  > > -- jra
>  > > --
>  > > Jay R. Ashworth                   Baylink
>  > jra at baylink.com
>  > > Designer                     The Things I Think                       RFC
>  > 2100
>  > > Ashworth & Associates     http://baylink.pitas.com                     '87
>  > e24
>  > > St Petersburg FL USA      http://photo.imageinc.us             +1 727 647
>  > 1274
>  > >
>  > >             Those who cast the vote decide nothing.
>  > >             Those who count the vote decide everything.
>  > >               -- (Joseph Stalin)
>  > >
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