dahdi-linux-18.104.22.168 kernel modules have been built with the OSLEC echo canceller (from the upstream kernel drivers/staging tree) for Fedora 8 i386 and Fedora 10 x86_64.
The first version with the OSLEC module is 22.214.171.124-3; RPMs are available in the Fedora & Enterprise Linux RPM Repository.
The spec file and patches,
along with the echo.tar.gz (kernel/drivers/staging/echo
directory from upstream) are available in the SVN repository:
http://messinet.com/viewvc/rpms/dahdi-linux/branches/oslec/ Git repository: