Is there an echo-free distro?

Al Johnson openmoko at
Fri Jan 16 02:47:32 CET 2009

The echo heard by the other party is influenced by the entire loop from their 
mic through the telco(s) to the Freerunner earpiece, through the air and/or 
casework to the Freerunner mic and back through the telco(s) to their 
earpiece. If there isn't enough gain around the loop then they won't hear 
echo. If echo suppression or cancellation is used effectively anywhere in the 
loop then they won't hear echo - this could be done by your telco. The degree 
of coupling between the Freerunner mic and earpiece may vary from phone to 
phone, so you might just have a sample with little coupling. 

On Thursday 15 January 2009, SCarlson wrote:
> There must be some other things influencing this. I have NEVER had an Echo
> issue. I have Revision A5 and have used pretty much every distro. Possibly,
> SIM Card and Service Provider nuances? I always read about the echo, echo
> fix etc.. and have just never had an issue. I live in NE USA and use AT&T
> with an old Cingular SIM card (grandfathered in when they merged).
> -Scott
> Yogiz wrote:
> > Hi,
> >
> > I'm currently using a quite customized but up to date version of
> > Om2008.9 testing (equal to Om2008.12?). It otherwise wonderful but I
> > still can't use the Freerunner as a normal cellphone with it yet as I
> > still get echo on the other side both for calls coming in and for the
> > ones going out.
> >
> > My other phone is basically falling apart so I'll need to move to
> > Freerunner for phone calls as well so I'd like to ask, which distros
> > are currently the best for it. As I've understood the FSO does not have
> > the echo problem [citation needed] so I thought I'd move to that. Are
> > there any better options? I'd prefer a distro where I can use opkg but
> > If none of these have decent call quality then I'll settle for
> > something else.
> >
> > Yogiz
> >
> > _______________________________________________
> > Openmoko community mailing list
> > community at
> >

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