This product is an equipment that transmits MIC\'s one-way voice channel signal (PRE-AMP output), two-way control data channel between control keyboard and receiver box, and Contacts System one-way (Normal Close, Normal Open) data channel through optical cable 1 core.
It is a WDM (Wavelength Division Multiplexing) method that utilizes optical characteristics to transmit long-distance wirelessly and is not affected by electric and magnetic fields.
LEDs for data input and output indication are attached to the transmitting and receiving parts, so you can visually check the data communication status without additional equipment.