[Asterisk-biz] PRI Hardware Echo Canceller

[Patrick]

On Thu, 2005-06-30 at 18:45 -0500, Kevin P. Fleming wrote:
[snip]
> The TE411P (the 3.3V version) has been shipping since before Astricon, 
> maybe three weeks or so. The TE406P (the 5V version) just started 
> shipping this week. The onboard echo canceller is able to handle 120 
> channels simultaneously with 16ms of echo tail (I don't remember how 
> many taps it uses). We've seen a significant performance boost using 
> this module (and the new generation 2 firmware for the TE4XXP cards) on 
> low-end machines.

Thanks for the info. Interesting stuff. One question. Iirc most telco
equipment does EC with a tail length of 128, 64 or 32ms. Is there any
particular reason why the TE4xxP uses 16ms and not a higher value?

Thanks,
Patrick