State the purpose of the QF/MX system.
Internal and external communications designed to provide convenient and effective communications among various plant locations, and between the plant and off-site locations
MX is to reduce number of hard wired signals.
MX( remote multiplex) purpose
To reduce the number of hard wired signals
Flow path of the QF (in plant communications system).
EPABX(electronic private automatic branch exchange) telephone system, sound powered telephone system, plant two-way radio system, and public address system allow communications from the control room and various plant locations.