LFX-49D видео дверный

Features: 1.The host machine is large in capacity and can be linked with 1200 extensions and suitable for all kinds of buildings 2.Two-bus type adopts 3-core bus, 2-core non-polar with decoder among floors and settle the problems completely caused by short circuit 3.The host machine has self-check function, different faults display automatically on the screen 4.Communications through extensions are confidential, one house trouble does not influence the system. The system can unlock the password and change it freely. 5.Adopts four-bus type, no need to install floor decoder, simple and easy in installation