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Wired Video
Traditional video wiring


Old video systems used a 6 core cable to each monitor. Two monitors can be connected per button. The monitors have 51 or 56 suffix.
True 2 wire video systems
These villa systems have a 2 wire bus that connects all compontents.
Systems can be enlarged to 50 to medium size apparment blocks and extra door panels.
Compatible monitors & handset codes end in 81 to 88.
