VoIP Mailing List Archives

[rschall at callone.net]

We have a location that is having a really odd issue. We have a sangoma
POTs card. We are running software echo cancellation with the card
(through asterisk) to try to eliminate some major echoing problems. I've
turned on both EC and echotrain, which seemed to have gotten rid of the
echo for the most part. However, we are now running into an issue where
the outside caller hears a star wars type of sound. I expierenced this
myself when talking to them. By this, I mean you hear a few words from
them, then a few seconds lagging behind, you'll hear a muffled (darth
vader) version of the same thing.

Has anyone seen this?
Thanks,
Rob

[jkinard at closeup.org]

That's probably just someone at the NSA snooping your lines and playing tricks on you...

<g>

--J
-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com]On Behalf Of Rob Schall
Sent: Thursday, March 27, 2008 4:24 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: [asterisk-users] Star Wars Echo Sound


We have a location that is having a really odd issue. We have a sangoma
POTs card. We are running software echo cancellation with the card
(through asterisk) to try to eliminate some major echoing problems. I've
turned on both EC and echotrain, which seemed to have gotten rid of the
echo for the most part. However, we are now running into an issue where
the outside caller hears a star wars type of sound. I expierenced this
myself when talking to them. By this, I mean you hear a few words from
them, then a few seconds lagging behind, you'll hear a muffled (darth
vader) version of the same thing.

Has anyone seen this?
Thanks,
Rob

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[cearle at cbltech.ca]

I wanna say that's the echotraining taking effect.

What it does is try to cause some echo so it can dynamically reconfigure the
levels on the fly -- right at the start of the call. I know this happens
with digium cards -- not sure if the Sangoma cards behave the exact same
way. It's only at the start of the call right? once that occurs, the EC is
kicked in and everything is fine?

--
Chris Earle
System Solutions Specialist,
Network Technologies Division

CBL Data Recovery
w: http://www.cbltech.com

"Rob Schall" <rschall at callone.net> wrote in message
news:47EC0243.6000906 at callone.net...

[asterisk-users at conr...]

[rschall at callone.net]

Actually, its just the opposite... The call is okay for a few seconds,
then the odd echo kicks in. When the training isn't turned on, it takes
20 seconds to so to kick the echo. With the training on, it works great
except for this bug. Several of the people using the same * system but
different phone stations are not seeing this problem.

I saw someone else believed it was a softphone issue. Is it possible
that its not a sangoma problem, but rather a polycom 501 issue? I just
want to start putting the grind to the correct people.

Rob
Chris Earle wrote:

[anthonyf at rockynet.com]

If the problem is specific to certian inspections I would verify the LAN
segments involved in connecting those devices.

Rob Schall wrote:

[rschall at callone.net]

They are all connected directly to the same switch which asterisk also
connects into. Its a small office (6 people).

Rob
Anthony Francis wrote:

[matt at venturevoip.com]

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Rob Schall wrote: