OLT full form is optical line terminal which is a device that used as ISPs endpoint of the passive optical network. Optical line terminal does also mediate to provide an interface between the ISPs network and PON.
OLT is a device which serves as an ISP endpoint and as well referred just as equipment. It is widely used to control the downstream or upstream flowing data and as well convert the standard signals through Fiber Optic Service to the PON system based framing or frequency.
Optical Line Termination does coordinate digital signals and multiple analog signals which are combined into one signal that is usually seen in ONT conversion devices. Upstream channel transfers different types of data, voice traffic from ISP and for the downstream user, the ISP sends data, voice, video which is converted through to their ONT devices.
OLT and ONT are the essential OLT devices for a PON network which leads the transformation towards flexibility, integration, and great reliability to meet all the specifications.