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

[Jon Bebeau]

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?

Thanks,

Jon
----- Original Message ----- 
From: "C F" <shmaltz at gmail.com>
To: "Asterisk Users Mailing List - Non-Commercial Discussion" 
<asterisk-users at 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 at 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 at benshaw.com]
>> Sent: 03 March 2005 12:32
>> To: asterisk-users at 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 at 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 at 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 at 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
>