[asterisk-users] Digium TE120P versus Sangoma A101D-X

[Paul Hales]

I also understand your stand here Kevin - there is no way you can
restrict the software running on a server out in the wild, and no way to
make sure the software they are running will not conflict in any way.

But a single port E1 card with hardware echo cancellation....possible?

PaulH


On Wed, 2007-11-28 at 17:22 -0600, Kevin P. Fleming wrote:
> George Pajari wrote:
> 
> > I've had this argument with Digium before -- their position is a crock.
> > As you can see from my analysis below, one can certainly run the HPEC on
> > a full T1 PRI span if you have a fast enough processor. Digium, however,
> > has made the business decision not to provide HPEC keys for their T1
> > card for reason they do not explain and which I cannot fathom.
> 
> It is very easy to understand, if you are in our position of having to
> support the product and deal with end users who don't have the technical
> knowledge that you do. The last thing we want is for someone who has a
> single port T1 card in a 2GHz P4 machine call and get a 24-channel HPEC
> key only to find out that the performance is poor (or worse), and claim
> that it is our fault.
> 
> > In summary, an X3210 processor has roughly 7.5 the processing power of a
> > 3GHz P4, therefore, it ought to be handle roughly 7.5 x 8 channels or 60
> > channels. Therefore, handling a single T1 span (23 channels) ought to be
> > easy.
> > 
> > If anyone on this list spots a flaw in this analysis, please let me know.
> 
> Well, there's no 'flaws', except for the assumption that the user who
> has the single-port T1 card already has a quad-core Xeon machine to plug
> it into. If they don't, the price difference between the 3GHz P4 and the
> X3210 machine is likely to be greater than the cost of the hardware echo
> canceler option for the single-port T1 card, in which case that's both
> easier and cheaper for the user to purchase, especially if they are
> installing this card into an existing server.
> 
> At this time Digium isn't selling a single-port T1 card with a hardware
> echo canceler so this is somewhat of a moot point, I suppose :-)
>