[Asterisk-Users] Re: WCFXO echo rexolved for me

[Brad Waite]

I would be up for some sort of user contrib report as to which hardware works 
well with *.  I dunno where the best place to post/host such a list, but I think 
it'd save some people some frustration.

Brad

Dana Dominiak wrote:

> Brian,
> 
> Ok, I'll take a closer look at my BIOS later tonight and talk to another 
> programmer to see what options might be the best to try.  Thanks for 
> being willing to do this, if you actually find a setting that makes a 
> difference, might help a lot of people.  Since it's just a lab machine, 
> at least you're not messing up anything important.
> 
> I do know that one of the reasons why we hate to assemble computers from 
> components at our company (i.e. buying motherboards, processors, video, 
> etc. boards all separately and plugging them in together) is that half 
> the time there's some weird timing issue that causes all kinds of 
> quirkiness.  I had a friend who would actually get out an oscilloscope 
> and check to make sure all the timing looked right, and you'd be 
> surprised how many cheap pci cards don't quite work right with certain 
> motherboards, and vice versa.  And there's really no way to know about 
> all these conflicts unless you build lots of computers and/or use a scope.
> 
> So now we just buy Dells or HPs or something, not the highest-end 
> equipment, but much less quirkiness since they have engineers checking 
> out the timing of all the boards, making sure there's no weird 
> conflicts, etc.
> 
> With Asterisk, it seems a huge amount of the problems people encounter 
> is getting all this equipment from different manufacturers to work 
> together.  I guess since there's really never been such an open 
> telephony product quite like Asterisk before, it's like the wild-west 
> for us.
> 
> -dana
> 
>> I'll give it a shot, but that stuff is a little out of the realm of my
>> knowledge. I remember a BIOS black magic web page from this past year on
>> slashdot, but I don't remember anything about it. Do you have any 
>> advice on
>> which options I should specifically look at?
>>
>> To add to my previous e-mail, I have disabled all on board hardware 
>> that was
>> unneccessary on the kt4vl, audio, usb, serial ports, parrallel ports etc.
>>
>> I would be interested in tracking down exactly what caused the problem, I
>> still have the board lying here, with the exact same memory and cpu 
>> that was
>> in it. I look forward to some options to try.
>>
>> > >  Brian> Hello, I resolved my echo issue using grandstream/estara
>> >  > etc etc Brian> sip phones and wcfxo interfaces from digium. I
>> >  > swapped out my Brian> via kt400 based msi kt4vl motherboard for an
>> >  > asus p4pe? i845? Brian> based motherboard and the echo has
>> >  > completly gone away along Brian> with aggressive suppressor option
>> >  > in the makefile.  I hope this Brian> helps others.
>> >
>> > I'm curious if you tried experimenting with any settings in the via 
>> kt4vl
>> > bios?  Or did you just swap motherboards first?  For bios settings, 
>> I mean
>> > things like timing settings or other PCI bus attributes, even memory
>> speeds.
> 
> 
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