[Asterisk-Users] HW Echo Cancellers

[Doug Lytle]

Joseph Tanner wrote:
>> Just a note:
>>
>>     
> Two questions.  One, why the need for local side echo cancellation?  I
> thought you could just reverse the connection and it would now disable
> echo in the opposite direction?  Just curious, I don't have a T1, and
> this is just based on what I've read.
>
>   
I have E.C. turned off in Asterisk, I want the card to have the ability 
to cancel in both directions.

> Two, is there any way to tell what cards have this option just by
> looking at them?  I bought a large lot (40+) and intend to resell
> them, probably on ebay.  I would like to know what extras they have or
> don't have, so I can list them appropriately.
>   
If you've looked at the picture in the ebaY auction, you should notice 
the daughter board.  Without the daughter board, the area is quite 
absent of chips.  The 1 board that I have without the daughter board and 
the 3 with had send side E.C.

You can verify by powering a unit up and scrolling though the options 
until you see 38.  If there is no 38, then the board doesn't have send 
side E.C.

Doug


-- 
Ben Franklin quote:

"Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety."