Due Fili electronic unit for black and white audio-video entrance panel, up to 200 internal units, with 3.7 mm fixed lens, wiring for connection of 1 call button and BUSY-WAIT indication, for use in conjunction with 692S and 6922 for the connection of individual apartments/users, for cover plates 1200, 1300, 8000 combined with modules 80P1+8019, and for cover plate 81V1, for use in systems with a MASTER electronic entrance panel
