MUX-2M and MUX-64 are designed for the application on communication-added line protection. It converts the optical signal send by a protection relay to the electrical signal that will be accepted by a digital multiplexer communication device.

LFP-912 is an amplitude-modulated power line carrier (PLC) transmitter /receiver. The LFP-912 is designed for directional comparison blocking applications with high-speed protective communications.