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

[Tzafrir Cohen]

On Sun, Apr 06, 2008 at 12:12:17PM -0400, Michael Cargile wrote:
>  <http://www.vicidial.com/>On Sun, Apr 6, 2008 at 11:27 AM, Tzafrir Cohen <
> tzafrir.cohen at xorcom.com> wrote:

(Off-list, and not expecting an on-list reply)

> 
> > We've already connected ~600 analog extensions to Asterisk and we were
> > far from reaching the bottlenecks. We have used a machine that is hardly
> > a top-of-the line server (a dual-core Dell machine), with some 20
> > Astribank 32 FXS-s connected to it.
> >

(And nicely enough, the point of the message was left unquoted: that 672 
channels are certainly possible, if there's a will.)

> 
> 
> There is big difference between a TDM card and a USB device. 

Our device is both a USB device and a TDM one. Analog vs. digital (or
extension vs. trunk) may be relevant. As for PCI vs. USB - they keep
telling us USB makes things more complicated :-)

> Also were you
> actively using all ~600 extensions at once?

No. In those limited tests we made we got to ~200 FXS channels running.

> 
> The system we were building was a predictive dialer. Not only were all
> channels engaged at one time but we were actively establishing and
> disconnecting channels at a rate of over 15 per second.
> 
> Anyone who is looking for a DS3 TDM card is probably not looking to use it
> to hookup channel banks with it. They are looking to increase their line
> capacity, thus increasing their number of concurrent channels.

While I don't have your experince, I would still speculate that even for
trunks the average capacity is not ther same load as that of a
predictive dialer.

-- 
               Tzafrir Cohen
icq#16849755              jabber:tzafrir.cohen at xorcom.com
+972-50-7952406           mailto:tzafrir.cohen at xorcom.com
http://www.xorcom.com  iax:guest at local.xorcom.com/tzafrir