[Asterisk-Users] tuning an x100p in Australia for echocancellation

[Adam Goryachev]

On Sun, 2006-01-15 at 10:16 +1100, James Harper wrote: 
> > If they won't, you can basically do the same thing by dialing out from
> > asterisk on one pstn line coming back in through a second pstn line,
> and
> > using the asterisk milliwatt generator. Or, if you have another
> asterisk
> > system available somewhere, call out through a pstn line to that
> > asterisk's
> > milliwatt generator. (Obviously its not as good as using a CO
> milliwatt
> > as now you have to take into consideration the loss from the second
> > pstn line, but it is a way to get a handle on the transmission loss
> > values, etc.)
> 
> Would the txgain on the 2nd line also come into play? I guess if you set
> it to zero then you only have to deal with an estimation of the line
> losses.

I can arrange a milliwatt generator for you off a PRI line if you need
one... It would be a remote exchange, but hopefully since it should be
all digital between your exchange and all the way to my asterisk box and
back, it might not matter ??

> On an au configuration example for the pap2 I have seen on the web, the
> impedence is set to '220+820||120nF', which suggests that our standard
> here isn't 600.

Yep, ours is called 'complex impedance' and some other names, but it is
different to the US... 

Regards,
Adam