[Asterisk-Users] Help - is voip good for in-house calls?

[Andrew Kohlsmith]

On Saturday 14 August 2004 18:29, Peter Svensson wrote:
> Using a BRI will eliminate echos from the pstn connection. Your ip phones
> should prevent echos from the local phone connections as well. That way
> you should not cause any noticable echo for the remote party. Being all
> digital has its advantages. :-)

*wrong*, unless there is something drastically different between ISDN PRI and 
ISDN BRI.

I have *bad* echo on my Bell Canada PRI (via TE405P) -- software echo 
cancellation helps but it's not perfect.  All the BRI/PRI does is ensure that 
*your end* is not generating echo, as there is no hybrid there.  There is 
still a hybrid in your handset, and there is still a hybrid at the other end 
of the PSTN call.

Regards,
Andrew