[Asterisk-Users] Bad echo on outgoing calls

[Rich Adamson]

Some changes were implemented around Oct 27th that improved the echo
problem. To use that, put "echotraining=yes" in zapata.conf for each
x100p card installed. As I understand this, it changed the way the
echo canceller samples the analog line. Using the parameter is far
better then previous, but there can still be some echo involved in
some cases.

As sort of a side note, every 2-wire (analog) to 4-wire (digitial)
conversion involves some form of echo cancelling mechanism, and its
ability to adjust successfully is dependent on the type of problems
that exist on the 2-wire phone line. You will likely find the echo will
be different by disconnecting other phones on the pstn line, use of
twisted pair phone wiring, keeping the wiring away from objects that
inject noise in the analog line, etc.

------------------------
> The X100P cards have horrible echo problems. I've heard talk about this
> being fixed, but havent seen anything done about it.
> 
> > -----Original Message-----
> > From: asterisk-users-admin at lists.digium.com [mailto:asterisk-users-
> > admin at lists.digium.com] On Behalf Of Larry D. Black
> > Sent: Saturday, November 15, 2003 3:55 PM
> > To: asterisk-users at lists.digium.com
> > Subject: [Asterisk-Users] Bad echo on outgoing calls
> > 
> > I have just installed and configured asterisk I have been playing with
> > software phones and an analog phone plugged into a TDM card. I have
> one
> > line coming in on a X100P card.
> > 
> > All calls between stations and even over the net to Digium however I
> > have just got a Grand stream Budgetone-101 phone and it works great
> > except outgoing calls over the phone line. This type of call is also
> > less than perfect on all other stations but not as bad as on the 101.
> > 
> > Very choppy and almost unusable this phone is located on a switch with
> > the asterisk server. This phone has very good quality on incoming
> calls
> > over the same line.
> > 
> > Any help would be greatly appreciated.
> > 
> > Larry D. Black
> > Black Sheep Computing, inc
> > wayne at bscn.com
> > 
> > 
> > 
> > _______________________________________________
> > Asterisk-Users mailing list
> > Asterisk-Users at lists.digium.com
> > http://lists.digium.com/mailman/listinfo/asterisk-users
> 
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