Optical Network Unit

In a fiber-optic network, there are devices that are necessary to complete the fiber to the home (FTTH) link. One of which is the ONT/ONU. ONT stands for Optical Network Terminal. ONU stands for Optical Network Unit. An ONT and an ONU are the same things. ONT and ONU both refer to the consumer end equipment in an optical fiber to the home (FTTH) communication link. But if you want to get technical, there is one difference and that is that ONT is an ITU-T term, whereas ONU is an IEEE term. ITU-T and IEEE are two different telecommunication standards. But you can think of an ONT and ONU as the same thing.