Il 05/07/2012 15.21, Olivier ha scritto:
Now and then, I'm facing environments in which it could be helpful to integrate building intercom systems with Asterisk.
Is there a standardized protocol available to run voice, video and command on 2-wires and most probably used by intercom systems ?
I think this is country specific, I know a quite large number of "de facto" standards but almost no real standard except the German FTZ 123 D 12. Most door phone analog system here (Italy) consists of 3/4+1 (bus + individual ring signal) wires and some more recent using proprietary digital protocols on a 2 wires bus. Sure I seen something similar in France.
Interfacing any old individual analog door phone to asterisk isn't so difficult using a door phone to fxo/fxo adapter like used to do with a legacy pbx.
The matter becomes more difficult approaching a building install as there are no devices to handle properly that. I think the snom PA-1 may be a good candidate to play with because of a versatile I/O that could be interfaced to a custom "door-phone bridge to IP".
-- _____________________________________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
