Stephen Bosch wrote:
Lee Jenkins wrote:
Stephen Bosch wrote:
Sidetone can be set in the phone configuration; before you do that,
though, I need to know what you mean by feedback.
Sorry, should have been more detailed. It's a sort of background
humming noise, almost like that if you placed the phone next to a high
output electric device. Didn't hear it with Grandstream phone so I
thought it may be something I can change in Polycom. Of course, it
could also be that polycom is better phone, but more apt to pick up
background noise that
It's only on zap calls. I'm still playing with rxgain and txgain in
hopes of resolving this. Basically, the humming noise increase with
volume.
What were your zapata gain settings before you started tweaking them?
.5/.5
As far as gain goes -- what about the Polycom phone? Are you using the
defaults from the SIP firmware package?
Not quite sure as I'm still getting familiar with the phone itself. I
would say yes because I did not change any of those settings except to
specify priority for codecs and to populate Line 1 variables.
Do you have other analog extensions connected to the line? I had a
situation in which there was audible humming because there was a fax
machine connected to the analog line between the Asterisk server and the
demarcation point.
No, the line goes directly from the phone company terminated jack to the
the Asterisk box. I also tried wedging a line filter between the
Asterisk box and the jack, but no effect.
Where is the Asterisk server located?
It's located on a shelf in my office. The only other electronics that
are close to it is the UPS for it, about 2 feet away.
I' tried playing with the rxgain and txgain again and it sounds like its
minimalized, but I can still hear it some although it is very low. It
is lowest when the call is bridged. Highest after dial, but before bridged.
Thanks again,
--
Warm Regards,
Lee
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