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What is OLT? OLT is short for Optical Line Terminal. It is located at Verizons Central Office. It replaces what used to be the Circuit Switch for POTS(Plain Old Telephone System. It send signals to the WMD before they are dispatched to your house via Fiber cable.
What is ONT? ONT-short for Optical Network Terminal is the Box installed on the outside of the house by Verizon. Also known as a TNI-Telephone Network Interface. This box replaces the one you have seen out there for years called a NID-Network Interface Device. The ONT converts Fiber signals from the central office to signals that can be transported over your existing in home wiring, Coax, Cat5, Cat6 etc. To See ONT Pictures, go to Ask General Fios Questions under What is....