In some cases the hardware echo canceller cannot be used. Mostly related to
an FXO module.
* FXO module if the first module is BRI or PRI
* FXS module if the Astribank has another FXO, no PRI/BRI, and is a sync
slave.
Signed-off-by: Oron Peled <oron.peled@xorcom.com>
Acked-By: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@10019 a0bf4364-ded3-4de4-8d8a-66a801d63aff