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Brett, Gary

2005-Mar-03 05:02 UTC

[Asterisk-Users] how do i get rid of this blasted echo !!!

Any help on this would be great

I have 2 TDM400P's, 2 asterisk servers (running on powerful boxes with FC1
and * v CVS 1.0.02), and 4 analogue PSTN lines from BT and whatever I do, I
cannot get rid of this damn local echo. Ive tried setting the echoTraining,
echoCancel (in phone.conf and Zapata.conf) , echocancelwhenbridged to every
possible combination , Ive even tried running the fxotune utility to no
avail. Ive swapped cards, telephone lines, servers and also tried different
phones (budgetone, x-lite, 7940) but still it's the same.

Does anybody have any other suggestions as this is driving me up the wall 

Cheers
Gary

Andrew Kohlsmith

2005-Mar-03 05:31 UTC

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[Asterisk-Users] how do i get rid of this blasted echo !!!

On March 3, 2005 07:02 am, Brett, Gary wrote:> I have 2 TDM400P's, 2 asterisk servers (running on powerful boxes with
FC1
> and * v CVS 1.0.02), and 4 analogue PSTN lines from BT and whatever I do, I
> cannot get rid of this damn local echo. Ive tried setting the echoTraining,
> echoCancel (in phone.conf and Zapata.conf) , echocancelwhenbridged to every
> possible combination , Ive even tried running the fxotune utility to no
> avail. Ive swapped cards, telephone lines, servers and also tried different
> phones (budgetone, x-lite, 7940) but still it's the same.
You haven't told us what hardware (platform) you're on, nor have you
told us
if your FXO ports are in whatever mode they need to be in for UK impedances 
(I think they default to FCC or North American).

For echo on my PRI I could not get rid of it until I recompiled the zaptel and 
wct4xxp drivers with MMX support enabled and with the instructions reordered 
and used for the pentium 4 processor (which I'm using, Xeon 2.6 to be
exact).

After that, the echo magically disappeared.  I haven't reverted back to my 
original (non-processor-optimized, non-MMX-enabled) drivers to see if it 
comes back, but that's all that's changed and it's in production so
I am
hesitant to screw around with it any more.  

-A.

Brett, Gary

2005-Mar-10 05:29 UTC

head link

[Asterisk-Users] how do i get rid of this blasted echo !!!

Sorry for the delay in replying to this post, my hardware platform is an HP
Compaq D530 SFF - 2.4gb /512mb /40gb. I have a TDM02b configuration (2xFXO).
You mention FCC and the mode for UK impedance, can you explain a little
further on this one as I am a little lost, I cant see any setting with
"FCC"
anywhere (even in the config samples) so could you explain whereabouts I set
this ?

The other question I have is regarding the MMX stuff you talk about. My
processor is a P4 2.4ghz, excuse my lack of knowledge here but I thought MMX
was a feature bundled with processors of about 5 years ago?? Do I still need
to recompile with MMX support, and if so, some pointer on how to do this
would be appreciated (also, can I recompile the zaptel drivers and carry on
as normal, or will I need to reinstall asterisk again?)

Any help would be greatly appreciated

Regards
Gary

-----Original Message-----
From: Andrew Kohlsmith [mailto:akohlsmith-asterisk@benshaw.com] 
Sent: 03 March 2005 12:32
To: asterisk-users@lists.digium.com
Subject: Re: [Asterisk-Users] how do i get rid of this blasted echo !!!

On March 3, 2005 07:02 am, Brett, Gary wrote:> I have 2 TDM400P's, 2 asterisk servers (running on powerful boxes with
FC1
> and * v CVS 1.0.02), and 4 analogue PSTN lines from BT and whatever I do,
I> cannot get rid of this damn local echo. Ive tried setting the
echoTraining,> echoCancel (in phone.conf and Zapata.conf) , echocancelwhenbridged to
every> possible combination , Ive even tried running the fxotune utility to no
> avail. Ive swapped cards, telephone lines, servers and also tried
different> phones (budgetone, x-lite, 7940) but still it's the same.
You haven't told us what hardware (platform) you're on, nor have you
told us

if your FXO ports are in whatever mode they need to be in for UK impedances 
(I think they default to FCC or North American).

For echo on my PRI I could not get rid of it until I recompiled the zaptel
and 
wct4xxp drivers with MMX support enabled and with the instructions reordered

and used for the pentium 4 processor (which I'm using, Xeon 2.6 to be
exact).

After that, the echo magically disappeared.  I haven't reverted back to my 
original (non-processor-optimized, non-MMX-enabled) drivers to see if it 
comes back, but that's all that's changed and it's in production so
I am
hesitant to screw around with it any more.  

-A.
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C F

2005-Mar-10 09:43 UTC

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Fwd: [Asterisk-Users] how do i get rid of this blasted echo !!!

---------- Forwarded message ----------
From: C F <shmaltz@gmail.com>
Date: Thu, 10 Mar 2005 11:43:06 -0500
Subject: Re: [Asterisk-Users] how do i get rid of this blasted echo !!!
To: Jon Bebeau <jbebeau@1nettw.net>


On Thu, 10 Mar 2005 10:43:54 -0500, Jon Bebeau <jbebeau@1nettw.net>
wrote:> Hi all,
>
> I'm still fighting echo on a T1-PRI too.  I see the suggestion about
> enabling MMX in zaptel/zconfig.h but I didn't understand the bit about
> reordering the instructions.  Can you elaborate?In /usr/src/zaptel/Makefile add
CFLAGS+=-march=pentium4

underneath the comment in the Makefile talking about all the config settings
being in zconfig.h.

> Thanks,
>
> Jon
> ----- Original Message -----
> From: "C F" <shmaltz@gmail.com>
> To: "Asterisk Users Mailing List - Non-Commercial Discussion"
> <asterisk-users@lists.digium.com>
> Sent: Thursday, March 10, 2005 9:07 AM
> Subject: Re: [Asterisk-Users] how do i get rid of this blasted echo !!!
>
> > On Thu, 10 Mar 2005 12:29:32 -0000, Brett, Gary
> > <gary.brett@cetelem.co.uk> wrote:
> >> Sorry for the delay in replying to this post, my hardware platform
is an
> >> HP
> >> Compaq D530 SFF - 2.4gb /512mb /40gb. I have a TDM02b
configuration
> >> (2xFXO).
> >> You mention FCC and the mode for UK impedance, can you explain a
little
> >> further on this one as I am a little lost, I cant see any setting
with
> >> "FCC"
> >> anywhere (even in the config samples) so could you explain
whereabouts I
> >> set
> >> this ?
> >
> >
> >> The other question I have is regarding the MMX stuff you talk
about. My
> >> processor is a P4 2.4ghz, excuse my lack of knowledge here but I
thought
> >> MMX
> >> was a feature bundled with processors of about 5 years ago?? Do I
still
> >> need
> >> to recompile with MMX support, and if so, some pointer on how to
do this
> >> would be appreciated (also, can I recompile the zaptel drivers and
carry
> >> on
> >> as normal, or will I need to reinstall asterisk again?)
> >
> > MMX is a feature that is bundled since the early days of PentiumII
> > (around 1997), it has never been removed, and is still with every
> > pentium cpu from intel.
> > To enable MMX in zaptel, before you compile zaptel, uncomment the line
> > that says:
> > /* #define CONFIG_ZAPTEL_MMX */
> > and change it to:
> > #define CONFIG_ZAPTEL_MMX
> >
> >
> >
> >> Any help would be greatly appreciated
> >>
> >> Regards
> >> Gary
> >>
> >> -----Original Message-----
> >> From: Andrew Kohlsmith [mailto:akohlsmith-asterisk@benshaw.com]
> >> Sent: 03 March 2005 12:32
> >> To: asterisk-users@lists.digium.com
> >> Subject: Re: [Asterisk-Users] how do i get rid of this blasted
echo !!!
> >>
> >> On March 3, 2005 07:02 am, Brett, Gary wrote:
> >> > I have 2 TDM400P's, 2 asterisk servers (running on
powerful boxes with
> >> > FC1
> >> > and * v CVS 1.0.02), and 4 analogue PSTN lines from BT and
whatever I
> >> > do,
> >> I
> >> > cannot get rid of this damn local echo. Ive tried setting the
> >> echoTraining,
> >> > echoCancel (in phone.conf and Zapata.conf) ,
echocancelwhenbridged to
> >> every
> >> > possible combination , Ive even tried running the fxotune
utility to no
> >> > avail. Ive swapped cards, telephone lines, servers and also
tried
> >> different
> >> > phones (budgetone, x-lite, 7940) but still it's the same.
> >>
> >> You haven't told us what hardware (platform) you're on,
nor have you told
> >> us
> >>
> >> if your FXO ports are in whatever mode they need to be in for UK
> >> impedances
> >> (I think they default to FCC or North American).
> >>
> >> For echo on my PRI I could not get rid of it until I recompiled
the
> >> zaptel
> >> and
> >> wct4xxp drivers with MMX support enabled and with the instructions
> >> reordered
> >>
> >> and used for the pentium 4 processor (which I'm using, Xeon
2.6 to be
> >> exact).
> >>
> >> After that, the echo magically disappeared.  I haven't
reverted back to
> >> my
> >> original (non-processor-optimized, non-MMX-enabled) drivers to see
if it
> >> comes back, but that's all that's changed and it's in
production so I am
> >> hesitant to screw around with it any more.
> >>
> >> -A.
> >> _______________________________________________
> >> Asterisk-Users mailing list
> >> Asterisk-Users@lists.digium.com
> >> http://lists.digium.com/mailman/listinfo/asterisk-users
> >> To UNSUBSCRIBE or update options visit:
> >>    http://lists.digium.com/mailman/listinfo/asterisk-users
> >> _______________________________________________
> >> Asterisk-Users mailing list
> >> Asterisk-Users@lists.digium.com
> >> http://lists.digium.com/mailman/listinfo/asterisk-users
> >> To UNSUBSCRIBE or update options visit:
> >>    http://lists.digium.com/mailman/listinfo/asterisk-users
> >>
> > _______________________________________________
> > Asterisk-Users mailing list
> > Asterisk-Users@lists.digium.com
> > http://lists.digium.com/mailman/listinfo/asterisk-users
> > To UNSUBSCRIBE or update options visit:
> >   http://lists.digium.com/mailman/listinfo/asterisk-users
> >
>
>

Brett, Gary

2005-Mar-11 06:50 UTC

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[Asterisk-Users] how do i get rid of this blasted echo !!!

So is it accepted as standard that compiling with MMX will help improve echo
type issues ?


-----Original Message-----
From: Herman Cremer [mailto:herman@etel.co.za] 
Sent: 11 March 2005 11:56
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [Asterisk-Users] how do i get rid of this blasted echo !!!

Thanks Error.

I have switched to IAX looong ago....much better !
Just battle when doing double NAT :)

I dont have the phones here with me,
but lets say its different...is there away
to adjust the channel to fix the err ?

-herman



On Fri, 2005-03-11 at 13:24, support@biz4web.com wrote:> Hi Herman,
> 
> Look at the bottom of your phones and compare the REN values of both. Do
> they both value of REN 1.0?  I think the one with the problem might have
> an REN value other than one.  You tell me!
> 
> Errol Samuels
> "Don't let SIP Drive you crazy, use IAX2"
> 
> 
> 
> > On the echo...
> >
> > I have 2 extensions, with different analog phones.
> > The one works fine, the other echos and scratches
> > like mad !!
> >
> > I have switched the ports, cables etc but its ALWAYS
> > the same phone...
> >
> > Maybe this could be it ?
> >
> > Is it ok from a SIP phone ?
> >
> > Herman cremer
> >
> >
> >
> >
> >
> > _______________________________________________
> > Asterisk-Users mailing list
> > Asterisk-Users@lists.digium.com
> > http://lists.digium.com/mailman/listinfo/asterisk-users
> > To UNSUBSCRIBE or update options visit:
> >    http://lists.digium.com/mailman/listinfo/asterisk-users
> >
> 
> 
> _______________________________________________
> Asterisk-Users mailing list
> Asterisk-Users@lists.digium.com
> http://lists.digium.com/mailman/listinfo/asterisk-users
> To UNSUBSCRIBE or update options visit:
>    http://lists.digium.com/mailman/listinfo/asterisk-users
_______________________________________________
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Brett, Gary

2005-Mar-11 09:04 UTC

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[Asterisk-Users] how do i get rid of this blasted echo !!!

Dennis, Thanks, I am currently using kernel 2.4, are you saying there are
fixes for this sort of thing in kernel 2.6.9 ????
 
-----Original Message-----
From: Dennis Webb [mailto:dwebb@delta-express.cc] 
Sent: 11 March 2005 13:57
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: RE: [Asterisk-Users] how do i get rid of this blasted echo !!!
 
I've added MMX and it didn't help.  I also did the
CFLAGS+=-march=pentium4
with no help there either.  The more I search, the more I found and I'm down
to disabling any hardware not used in the box such as USB and recompiling
the kernel with a fresh copy from kernel.org.  It seems there were a lot of
problems solved when 2.6.9 came out.

If I ever get mine fixed, I will try to post everything I did.

On Fri, 2005-03-11 at 07:50, Brett, Gary wrote: 
So is it accepted as standard that compiling with MMX will help improve echo
type issues ?
 
 
-----Original Message-----
From: Herman Cremer [mailto:herman@etel.co.za] 
Sent: 11 March 2005 11:56
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [Asterisk-Users] how do i get rid of this blasted echo !!!
 
Thanks Error.
 
I have switched to IAX looong ago....much better !
Just battle when doing double NAT :)
 
I dont have the phones here with me,
but lets say its different...is there away
to adjust the channel to fix the err ?
 
-herman
 
 
 
On Fri, 2005-03-11 at 13:24, support@biz4web.com wrote:> Hi Herman,
> 
> Look at the bottom of your phones and compare the REN values of both. Do
> they both value of REN 1.0?  I think the one with the problem might have
> an REN value other than one.  You tell me!
> 
> Errol Samuels
> "Don't let SIP Drive you crazy, use IAX2"
> 
> 
> 
> > On the echo...
> >
> > I have 2 extensions, with different analog phones.
> > The one works fine, the other echos and scratches
> > like mad !!
> >
> > I have switched the ports, cables etc but its ALWAYS
> > the same phone...
> >
> > Maybe this could be it ?
> >
> > Is it ok from a SIP phone ?
> >
> > Herman cremer
> >
> >
> >
> >
> >
> > _______________________________________________
> > Asterisk-Users mailing list
> > Asterisk-Users@lists.digium.com
> > http://lists.digium.com/mailman/listinfo/asterisk-users<http://lists.digium.com/mailman/listinfo/asterisk-users>
> > To UNSUBSCRIBE or update options visit:
> >    http://lists.digium.com/mailman/listinfo/asterisk-users<http://lists.digium.com/mailman/listinfo/asterisk-users>
> >
> 
> 
> _______________________________________________
> Asterisk-Users mailing list
> Asterisk-Users@lists.digium.com
> http://lists.digium.com/mailman/listinfo/asterisk-users<http://lists.digium.com/mailman/listinfo/asterisk-users>
> To UNSUBSCRIBE or update options visit:
>    http://lists.digium.com/mailman/listinfo/asterisk-users<http://lists.digium.com/mailman/listinfo/asterisk-users> 
 
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