In fiber-to-the-premises systems, the signal
is transmitted to the customer premises using fiber optic
technologies. Unlike many conventional telephone technologies, this
does not provide power for premises equipment, nor is it suitable
for direct connection to customer equipment. An ONT (optical
network terminal) is used to terminate the fiber optic line,
demultiplex the signal into its component parts (voice telephone,
television, and Internet), and provide power to customer
telephones. As the ONT must derive its power from the customer
premises electrical supply, many ONTs have the option for a battery
backup, to maintain service in the event of a power outage. As one
of the important part, ONT terminal directly affect the reliability
of the entire solution, maintainability and scalability.
