In software asterisk can support more than that, no?
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of BJ Weschke
Sent: Tuesday, 6 December 2005 17:03
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [Asterisk-Users] Echo
I have echocancel=yes in zapata.conf but when I do a zap show
channel 1, I notice echo cancellation is turned off.
I followed the article that talks about the order in which
the statements need to be in zapata.conf to get echo canceling to work:
From:
[EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Alberto Risco
Sent: Friday, September 30, 2005
9:58 AM
To: Asterisk Users Mailing List -
Non-Commercial Discussion
Subject: [Asterisk-Users] Echo
Cancellation not working in Zapata.conf
I have echocancel=yes in zapata.conf
On Friday 30 September 2005 09:57, Alberto Risco wrote:
I have echocancel=yes in zapata.conf but when I do a zap show channel 1,
I notice echo cancellation is turned off.
If the channel is not in use, echo cancellation will be off.
Your show zap channel output shows it's on-hook, so the DSP
Aug 17, 2005, at 5:44 AM, Tom Hayden wrote:
I have experienced pretty nasty echo on my PRI w/TE110P. The echo was
only coming from other POTS lines, because cell phones already have
echo cancellation, and other PBX's had the same. I resolved the
problem by turning on the AGGRESSIVE option and
Rich Adamson wrote:
I have been reading with great interest the posts on trouble shooting
echo cancellation with *. Is it just coincidence that all of this
discussion has been with analog lines. Are PRI's susceptible to echo
problem like POTS lines.
Keep reading. Echo _can_ occur
I have been reading with great interest the posts on trouble shooting
echo cancellation with *. Is it just coincidence that all of this
discussion has been with analog lines. Are PRI's susceptible to echo
problem like POTS lines.
Thanks for clearing this up.
Alan
Sent: Wednesday, August 17, 2005 8:18 AM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: [Asterisk-Users] Echo cancellation again ...
I have been reading with great interest the posts on trouble shooting
echo cancellation with *. Is it just coincidence that all
Alan Bunch wrote:
I have been reading with great interest the posts on trouble shooting
echo cancellation with *. Is it just coincidence that all of this
discussion has been with analog lines. Are PRI's susceptible to echo
problem like POTS lines.
Alan,
I have experienced echo on our
I have experienced pretty nasty echo on my PRI w/TE110P. The echo was
only coming from other POTS lines, because cell phones already have
echo cancellation, and other PBX's had the same. I resolved the
problem by turning on the AGGRESSIVE option and it works fine now, and
we haven't noticed a
I have been reading with great interest the posts on trouble shooting
echo cancellation with *. Is it just coincidence that all of this
discussion has been with analog lines. Are PRI's susceptible to echo
problem like POTS lines.
Keep reading. Echo _can_ occur whenever a two-wire
I have minor echo on an IAX2 channel when using Firefly and a head
set. I have tried various headsets and settings but still a little bit
of the echo remains and I'd love to get rid of it. After some research
I stubled on zaptel/mec2.h but it seem that it works only on the ZAP
channel. Is there
Script Head wrote:
I have minor echo on an IAX2 channel when using Firefly and a head
set. I have tried various headsets and settings but still a little bit
of the echo remains and I'd love to get rid of it. After some research
I stubled on zaptel/mec2.h but it seem that it works only on the
] On Behalf Of Richard Cook
Sent: Wednesday, February 09, 2005
5:11 PM
To:
asterisk-users@lists.digium.com
Subject: [Asterisk-Users] Echo
Cancellation
Can anyone provide a good manufacturer of echo cancellation
equipment for a PRI?
--
Richard Cook
[EMAIL PROTECTED]
T: 705-497-9320
Can anyone provide a good manufacturer of
echo cancellation equipment for a PRI?
--
Richard Cook
[EMAIL PROTECTED]
T: 705-497-9320
x2010
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Asterisk-Users mailing list
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Title: Message
hi...
in my zapata
conf
i
have
echocancel=yes
but when i do zap
show channel 2
i
have
echocancel=128 taps,
currently off
I am have big echo
problems from the remote userthe remote user can hear himself
talk.
Thanks,Peter
Over the last couple weeks I've tried everything I could get my hands on
in an attempt to get rid of my echo problems. Using a CVS checkout of
just yesterday, I've tried every echo cancellation routine in zconfig.h
(including Mark2 w/Aggressive) , as well as the echotraining=800
mentioned on
card.
Rgds
Tim
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Rich Adamson
Sent: 01 July 2004 14:21
To: [EMAIL PROTECTED]
Subject: Re: [Asterisk-Users] Echo cancellation, when software doesn't
cut it. Whats next?
Over the last couple weeks I've tried
On Thursday 01 July 2004 08:39, Robinson Tim-W10277 wrote:
All voip providers will use digital 4-wire interconnect to Asterisk or
similar, so echo problems are much reduced, as there are only 'echo
points' at the far end and your handset.
And on my PRI that is specifically where my echo is
Obviously the less I spend the better. But if we have to, a few thousand
more I guess. The problem I have is that this setup is more of a trial
run. Once it works, I'm going to be cloning slightly smaller setups to
9 other cities. But they are pretty small, 1 or 2 lines and 2-4 phones
in each
-
From: Andrew Kohlsmith [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Thursday, July 01, 2004 10:56 AM
Subject: Re: [Asterisk-Users] Echo cancellation, when software doesn't cut
it. Whats next?
On Thursday 01 July 2004 08:39, Robinson Tim-W10277 wrote:
All voip providers will use digital 4
On Thursday 01 July 2004 12:03, Billy Huddleston wrote:
I've got the same problem NEAR end echo (We hear the echo on OUR side,
person on the PSTN never hears it..)
That's what I have -- I called it far-end echo because I hear the echo, so
it's coming from the far-end.
We're tyring to get our
On Thu, 1 Jul 2004, Mike Benoit wrote:
Obviously the less I spend the better. But if we have to, a few thousand
more I guess. The problem I have is that this setup is more of a trial
run. Once it works, I'm going to be cloning slightly smaller setups to
9 other cities. But they are pretty
...
We found out that the 1-800 #'s go out our carriers Sonus switch (a VoIP
switch) which has 128ms Echo Can in it... Hmmm...
Thanks, Billy
- Original Message -
From: Brent Franks [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Thursday, July 01, 2004 12:16 PM
Subject: Re: [Asterisk-Users
Over the last couple weeks I've tried everything I could get my hands on
in an attempt to get rid of my echo problems. Using a CVS checkout of
just yesterday, I've tried every echo cancellation routine in zconfig.h
(including Mark2 w/Aggressive) , as well as the echotraining=800
mentioned on this
Mike Benoit wrote:
So whats the next step?
How much money are you willing to put in the project?
Are you talking POTS lines or a PRI?
If this is a serious project and you'd really like to clear it up I'd
look at a Cisco device (maybe one of the newer rackmount 1700s) with FXO
ports or a Serial
I do feel the echo cancellation does need some work.
Currently, other than listening to users, there is no way to benchmark or
trouble shoot echo problems.
We find that 2 to 3 out of every 20 calls will experience echo. While
echo is a problem that naturally occurs from SIP - PSTN and vice
I would also offer feedback that we too have random calls with echo on
our end, that can't be traced to a reproducible event. It's very odd
and can be frustrating, as it's a big distraction for those that don't
know better. Like a bad cell phone connection when you hear yourself
talk. For us,
I do feel the echo cancellation does need some work.
Currently, other than listening to users, there is no way to benchmark or
trouble shoot echo problems.
Sure there are, it's just that 99% of the asterisk implementors don't
have the test equipment to do it, and a good share probably
snip
I've got a fair amount of test equipment (and 20+ years telephony
background), and am planning to assemble a document identifying some of
the pstn issues, level settings, and other things impacting a reasonable
system implementation. Unless someone wants to UPS a transmission test
set to
At 02:30 PM 4/22/2004, you wrote:
I would also offer feedback that we too have random calls with echo on our
end, that can't be traced to a reproducible event. It's very odd and can
be frustrating, as it's a big distraction for those that don't know
better. Like a bad cell phone connection when
We have three Cisco 7940 SIP phones and 1 POTS phone connected to our
*
server with TDM10B fxs card. Our * server is connected to the pstn
with
3
X100P cards. We have similar echo problems but only on our SIP
phones.
We do not have any echo problems with the POTS phone.
We just
The single most usefull tool that anyone outside telco consultants is
likely to have is ztmonitor.
If you do a ztmonitor [channel number] -v you will get a visual of the
sound strengths and it's pretty easy to see when rx or tx are out of
balance...
Now, if only that would help fix the
I've got a really cheap analog phone connected to a Sipura SIP adaptor,
and have zero echo problems...
Just static problems, but it may be related.
Chris.
On Thu, 22 Apr 2004, Brent Franks wrote:
We have three Cisco 7940 SIP phones and 1 POTS phone connected to our
*
server with TDM10B
snip
I've got a fair amount of test equipment (and 20+ years telephony
background), and am planning to assemble a document identifying some of
the pstn issues, level settings, and other things impacting a reasonable
system implementation. Unless someone wants to UPS a transmission test
At 02:30 PM 4/22/2004, you wrote:
I would also offer feedback that we too have random calls with echo on our
end, that can't be traced to a reproducible event. It's very odd and can
be frustrating, as it's a big distraction for those that don't know
better. Like a bad cell phone connection
Hi,
I've tried all the other methods of dispelling the x100p echo mystery such as echo training rx tx gain through ztmon and swapping POTS lines etc etc.
Can someonemail me a step by step guide to changing the echo cancellation algorithms such as Mark,Mark2, Steve etc.
Muchos!
Taff.
Yahoo!
I've tried all the other methods of dispelling the x100p echo mystery
such as echo training rx tx gain through ztmon and swapping POTS lines
etc etc. Can someone mail me a step by step guide to changing the echo
cancellation algorithms such as Mark,Mark2, Steve etc.
There isn't much to the
I've tried all the other methods of dispelling the x100p echo mystery such
as echo training rx tx gain through ztmon and swapping POTS lines etc etc.
Can someone mail me a step by step guide to changing the echo cancellation
algorithms such as Mark,Mark2, Steve etc.
I spent a fair amount of
I could kiss you, this resolved my entire echo problem with the X100P.
I have a bottle of scotch with your name on it.
Jeff
From: dkwok [EMAIL PROTECTED]
Reply-To: [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Subject: [Asterisk-Users] Echo cancellation
Date: Fri, 20 Feb 2004 12:43:59 +0100
I had
Hello
I get these entries in my event
log
Jan 31 19:21:08 gateway kernel: zaptel
Disabled echo canceller because of tone (rx) on channel 1
Do I have to change anything for enable
echo cancellation?
Regards
Deepak
echo cancellation is activated in /etc/asterisk/zapata.conf
However, how to confirm it?
Does zap show channel 1 confirm the existence of echo cancellation?
--
David Kwok
Iaxtel/FWD # 17001813482
smime.p7s
Description: S/MIME Cryptographic Signature
The library has several DSP features, including AGC, denoising, and
echo cancellation. These are all provided via integration with
preprocessing from the SPEEX library. I don't know if DAN allows you
to turn on/off echo cancellation or not. However, the echo
cancellation code from speex is
On Dec 3, 2003, at 8:22 PM, Peter Zeltins wrote:
The library has several DSP features, including AGC, denoising, and
echo cancellation. These are all provided via integration with
preprocessing from the SPEEX library. I don't know if DAN allows you
to turn on/off echo cancellation or not.
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Nicolas Gudino wrote:
| If the terminating tail circuit has cancelable echos and if the echo
| canceler is enabled, you will hear echo for the first few utterances and
| then it will die away. After a few seconds of speech, the echo should be
| gone or
Peter Zeltins wrote:
I do not have a hardphone to play around with, but the echo is there both
with built-in audio card (SigmaTel) and Bluetooth headset. There are no
mixer settings than I can adjust as well. I'll try disabling AGC and/or
lowering mike sensitivity.
Peter
According to the
I'm interested. I'm running chan_capi 0.3.0 with Fritz PCI ISDN card.
Using
DIAX as softphone and dialing out to PSTN generally results in good
sound
quality at softphone end (no echo), but PSTN end experiences quite a bit
of
echo. I have enabled echosquelch in capi.conf, but it does not
On Nov 26, 2003, at 10:34 AM, Peter Zeltins wrote:
I'm interested. I'm running chan_capi 0.3.0 with Fritz PCI ISDN card.
Using
DIAX as softphone and dialing out to PSTN generally results in good
sound
quality at softphone end (no echo), but PSTN end experiences quite a
bit
of
echo. I have
Hi,
I'm interested. I'm running chan_capi 0.3.0 with Fritz PCI ISDN card. Using
DIAX as softphone and dialing out to PSTN generally results in good sound
quality at softphone end (no echo), but PSTN end experiences quite a bit of
echo. I have enabled echosquelch in capi.conf, but it does not seem
Il mar, 2003-11-25 alle 14:28, Peter Zeltins ha scritto:
Hi,
I'm interested. I'm running chan_capi 0.3.0 with Fritz PCI ISDN card. Using
DIAX as softphone and dialing out to PSTN generally results in good sound
quality at softphone end (no echo), but PSTN end experiences quite a bit of
What is the status on echo cancellation in
Asterisk/CAPI? I know Zaptel drivers will do echocancel, and chan_capi does have
support for Eicon's echo cancellation, but what about the rest? I found in
mailing list archives a patch description that will mute RX channel whenever
signal level is
Il lun, 2003-11-24 alle 23:19, Peter Zeltins ha scritto:
What is the status on echo cancellation in Asterisk/CAPI?
I tried to straighten this out; I think it works, but I'm not sure. If
it does work, I think it might find its way in future chan_capi
releases; if you want to try it out at this
System Diagram:
+- PRI -- modem bank
|
LEC -- PRI -- * with --+
T400P --+
| (pri)
+- TDMoE -- *
with -- SIP --
We have been pretty much able to solve our echo problems, except for
the primary mode in which we desire to operate our system.
See system diagram at bottom.
Prior to making adjustments to cancel echos (all echocancel=no):
Call TypeResult (Before)
-
On Wed, Nov 19, 2003 at 06:56:04PM -0600, Rich Adamson wrote:
I've got an X100P a cisco 7960. if i call from an analog line via the
x100p to the cisco, there is an overly audible echo on the cisco. If i
make a call from a cisco to cisco, there is no echo. zapata.conf has
I've got an X100P a cisco 7960. if i call from an analog line via the
x100p to the cisco, there is an overly audible echo on the cisco. If i
make a call from a cisco to cisco, there is no echo. zapata.conf has
echocancel=yes echocancelwhenbridged=yes set. Any ideas?
I'm currently using
Did you place echocancel=yes before the definition of the channel with
channel keyword in zapata.conf ?
regards
Martin
On Wed, 19 Nov 2003, Elijah Chancey wrote:
I've got an X100P a cisco 7960. if i call from an analog line via the
x100p to the cisco, there is an overly audible echo on the
]
To: [EMAIL PROTECTED]
Sent: Wednesday, November 19, 2003 6:01 PM
Subject: Re: [Asterisk-Users] echo cancellation
Did you place echocancel=yes before the definition of the channel with
channel keyword in zapata.conf ?
regards
Martin
On Wed, 19 Nov 2003, Elijah Chancey wrote:
I've got
AM
To: [EMAIL PROTECTED]
Subject: Re: [Asterisk-Users] echo cancellation
Did you place echocancel=yes before the definition of the channel with
channel keyword in zapata.conf ?
regards
Martin
On Wed, 19 Nov 2003, Elijah Chancey wrote:
I've got an X100P a cisco 7960. if i call from an analog
- Original Message -
From: TeleSIP [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Thursday, November 20, 2003 10:23 AM
Subject: Re: [Asterisk-Users] echo cancellation
It seems that everyday we see these complaints about bad echo on X100P
cards.
Why can't these cards incorporate
I've got an X100P a cisco 7960. if i call from an analog line via the
x100p to the cisco, there is an overly audible echo on the cisco. If i
make a call from a cisco to cisco, there is no echo. zapata.conf has
echocancel=yes echocancelwhenbridged=yes set. Any ideas?
I'm currently
I have been struggling with echo cancellation for the last few days. It
seems to me that it would be useful to start up a technical discussion
of the issue so that we don't have to solve the problem empirically. My
system is SIP (Grandstream) = Asterisk = Adtran TSU600 =FXO
=POTS. From what
I am trying to optimize echo cancellation. Originally (with only one
phone attached), echo cancellation worked well. Echo was only obvious
in the first second or so of a call. Now, with multiple phones on the
system, the echo does not go away. It is quiet, but audible and somewhat
annoying.
Hello,
I have strong unsolved problem with echo while using asterisk as a SIP
to PSTN gateway. The PSTN side is built with an OpenLine 4 from
Voicetronix and the SIP is from GrandStream.
The echo I here is at the SIP side but not at the PSTN side. I have
played with OL4 API to try to tune the
-Users] Echo cancellation
hi Lars,
does el-cheapo BRI mean chan_modem_i4l? the echo you hear
is caused by todays very sensitive pstn phones. the mic picks
up the sound from the speaker and sends it back to you.
try to reduce the rx and tx volumes of your snoms (if that is
possible), or add rx
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