Moises Silva 1db40e60e4 freetdm: improved logic to enable/disable EC on call start/stop
- MFC-R2 requires tone signaling that gets screwed sometimes
           if the EC is enabled during call setup.
         - EC is now enabled only when switching to a state requiring
         media (UP and PROGRESS_MEDIA)
         - The logic is aware of EC persist option in Wanpipe
         - Improved logging in ftmod_wanpipe to print EC state on startup
2011-01-18 11:28:37 -05:00
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