[asterisk-dev] bug in echo cancel at 256 taps

[John Lange]

On Wed, 2006-08-02 at 12:08 -0500, Eric "ManxPower" Wieling wrote:
> Sounds like ECFO.
> 
> Echo Canceler Freak Out, this happens when the rxgain is too high and 
> the echo canceler freaks out.  Some users describe it as "screeching", 
> "feedback", "static", or other useless terms.  If users report "static" 
> on a system where there cannot be static (all digital, PRI, SIP, etc), 
> you might be experiencing ECFO.

Actually that is a very good thought. I forgot that all versions of the
ECHO canceler before MG2 are subject to ECFO on clipping. I will switch
cancelers, adjust gains and get back to the list if it persists.

John