The full name of OLT is optical line terminal (Optical Line Terminal), which is used to connect optical fibers and transmit signals. It is an important component in fiber optic communication systems. OLT is responsible for converting optical signals into electrical signals and communicating with other network devices. It provides high-speed broadband access, data transmission and voice communications. It is often used in fiber-to-the-home (FTTH) or fiber-to-the-building (FTTB) access networks.

There are two main types of data tasks in OLT - downstream (getting data from the global network) and upstream (getting data from users). OLT supports dynamic routing protocols such as RIP (Routing Information Protocol) and SPF (Small Form Factor Pluggable) to ensure network security. The maximum working distance of OLT is 20 kilometers.