[Asterisk-biz] PRI and echo cancelation ...

[Eric Wieling aka ManxPower]

Tom Rymes wrote:
> On Aug 18, 2005, at 3:28 AM, Rob Lith wrote:
> 
>> The only instance you'll get classis 'echo' is when calling from you
>> ISDN to an analogue line on the far end.
> 
> 
> Doesn't that describe at least 80% of phone calls? I know that here  in 
> the US 99.99% of our customers have POTS analog telephone lines.  The 
> only ones who don't are commercial accounts that have T1 or PRI  
> service, and maybe one guy who has a BRI for some unfathomable reason.

Cell phones are also typically digital as well.  A commerical T-1 echo 
canceler hardware device is not usually cheap, but I'm told they are 
very effective.

-- 
Eric Wieling * BTEL Consulting * 504-210-3699 x2120