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[brent at texascountryt...]

We're deploying an asterisk-based phone system at all of our branch
offices in an effort to eliminate long-distance costs incurred from the
constant branch to branch calls. We're using the Snom 300's at all
offices for the desk phones and X100P cards to interface to 2 analog
lines. I'm having a problem tuning all the echo out of the system. So
far two branches are using the new system and they are both reporting
echo on both incoming and outgoing calls. The echo seems to be confined
to the Snom 300 phones and is not heard by the person on the zap line.
The echo is only the voice of the person using the Snom phone. There
doesn't seem to be any echo of the analog line audio. I have tried
adjusting the gain of the lines, turning on echo cancellation, Turning
on echo training and nothing seems to work. At one of the branches, I
re-compiled asterisk and zaptel using the OSLEC drivers and that doesn't
seem to have had any effect either. What am I missing?

Thanks,
Brent Davidson

[lathama at lathama.com]

They could be reporting glare back from the phone because the mic or
ear volume is miss matched, normalize the volume on the phones.
On Feb 7, 2008 12:40 PM, Brent Davidson <brent at texascountrytitle.com> wrote:

[Guest]

After Andrew's suggestion, if that isn't the problem, spend some more
time on OSLEC to be darn sure it's operating properly -- that thing
works like a champ for my crappy lines!

Moj

Brent Davidson wrote:

[brent at texascountryt...]

I thought I had the echo out of the system, but it keeps coming back...
What I'm being told is that when the users call out from their snom
phones they hear their own voice. There's no delay, but it's extremely
loud. If I cut their mic volume down to the point where the sidetone is
not a problem the person on the other end can't hear them, or tells them
they sound like they are "down in a well". They say the problem is not
there on incoming calls. I spent half a day navigating the maze of
Verizon phone numbers and finally got to someone who gave me the Type
102 test line numbers and I calibrated the gains as close to 14844 as
possible and it still does not seem to have any effect on the echo. Is
there a setting in the Snom phone that I am missing? These phones are
running Firmware version 7.1.30, and I've been through them forward and
backwards and can't seem to find anything to adjust the echo
suppression. The thing that makes this even worse is that I have tried
many many tests of my own and can't seem to replicate the echo
conditions. They always seem to show up when I am at a different
office. My test Snom 300 phone that I keep here at my desk and connect
to each of the branch office servers as needed never seems to have the
echo/sidetone problem. I need some help figuring this out.

Thanks,
Brent Davidson

Brent Davidson wrote:

[mjc at avtechpulse.com]

Brent Davidson wrote:

[mcdent at gmail.com]

On 07/02/2008, Brent Davidson <brent at texascountrytitle.com> wrote: