[Asterisk-biz] PRI Hardware Echo Canceller

[mattf]

What is the reason you need a separate hardware echo-canceling system?

We have an Asterisk system with 3 fully echo-cancelled T1s doing 60,000+
calls per day with no problem with echo.

What kind of echo are you getting on your Asterisk server right now and what
are your Zapata echo settings?

One thing to keep in mind is that Digium will be releasing a quad T1 card
with hardware echo-canceller on-board in the next couple months, and Sangoma
is going to release their own hardware echo-canceller on-board Quad T1 card
before the end of the year as well.

MATT---



-----Original Message-----
From: ewr at erols.com [mailto:ewr at erols.com]
Sent: Thursday, June 30, 2005 5:43 PM
To: Commercial and Business-Oriented Asterisk Discussion
Subject: Re: [Asterisk-biz] PRI Hardware Echo Canceller


>> Unfortunately, soldering a power supply and cat 5 on to a 20 year old
>> card from ebay and then putting it all in a shoe box, or trying to track
>> down (as the wiki calls them) "the highly desireable 2 slot 253C"
>> shelves, are not really the greatest options for a corporate
>> environment.
> ebay usually has those shelves, not the 2-slot ones, but 7-slot older
> ones. yeah, they are wirewrap, big deal.

Is that the 253B shelf?  Wire-wrap is not really the problem.  The real 
problem is availability (though size is also a consideration).  I just 
looked through the Tellabs equipment on ebay and don't see any of the 8-slot

shelves available right now.

Either way, it doesn't solve my problem.  If I am installing asterisk in a 
small to medium sized office, I would like to find a product that is easy to

purchase and easy to connect.  I don't want to rely on something that I 
*might* be able to get if I watch ebay close enough, never knowing just how 
much space it needs, how much I will have to pay for it, or if it will 
actually work when it arrives.

I didn't really mean to be short in the last email, but it seems (IMHO) that

there is a huge need for a current product like this.  Evidently they *do* 
exist, at least according to the Ditech and Valient websites, but I can't 
seem to find anyone that actually sells them.  My hope was that some of the 
other integrators or suppliers on this list might have found a current 
product that fills this need.  Is everyone just using the ancient Tellabs 
stuff?

Eric


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