[Asterisk-Users] TE411P Really Bad Echo

[C F]

On 2/12/06, asterisk at anime.net <asterisk at anime.net> wrote:
> On Sun, 12 Feb 2006, Steve Underwood wrote:
> > I don't know about the Tellabs cancellers in particular, but I think any echo
> > canceller built in the 80s will be a fairly poor performer. Many improvements
> > in EC occurred in the early 90s, in response to the problems of earlier
> > cancellers. Also, most older cancellers only cancel fairly short echo tails,
> > as the compute needed for longer cancellation was expensive.
> >
> > On the other hand, they may be adequate for your needs, and are cheap.
>
> the tellabs you find on ebay were not built in the 80s. they have 64ms and
> 128ms echo tails.
>

How do you know which ones I'm talking about? read up:
http://www.voip-info.org/wiki/view/Tellabs+Hardware+Echo+Cancellers