Intercom-telephone interface that allows a normal telephone to be connected to the telephone trunk line and the home intercom system. Any programming is required and the telephone communication is direct. Intercom communication can take place after that an external call has been received or by pressing the R key of Flash twice. Operation: during conversation a background sound signal indicates the arrival of an intercom or telephone call to the user. The telephone conversation under way can be put in hold, with background music, in order to answer the intercom call. The intercom interface has a terminal board with the same numbering as a Farfisa intercom and can form part of a normal 4+1 intercom or traditional video intercom system.

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