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An optical line termination (OLT), also called an optical line terminal, is a device which serves as the service provider endpoint of a passive optical network. It provides two main functions: to perform conversion between the electrical signals used by the service provider's equipment and the fiber optic signals used by the passive optical ...
A passive optical network consists of an optical line terminal (OLT) at the service provider's central office (hub), passive (non-power-consuming) optical splitters, and a number of optical network units (ONUs) or optical network terminals (ONTs), which are near end users. [2] [3] There may be amplifiers between the OLT and the ONUs. [4]
IEEE 802.3 standards apply to media access control (MAC) sublayer and Physical sublayer specifications, and their respective management, only. For EPON, IEEE 802.3 defined separately a service provider MAC and PHY called an Optical Line Terminal (OLT) and a subscriber MAC and Physical sublayer called an Optical Network Unit (ONU).
An optical network terminal (ONT, an ITU-T term), also known as an optical network unit (ONU, an IEEE term), is used to terminate the optical fiber line, demultiplex the signal into its component parts (voice telephone, television, and Internet access), and provide power to customer telephones.
The primary optical transmitter, known as the optical line terminal (OLT), is housed within the central office of the telecommunications operator. A laser in the OLT injects photons from the central office into a glass-and-plastic fiber-optic cable that terminates at a passive optical splitter.
By joining a cloud-grade line system with plug-and-play simplicity, Arista's (ANET) OSFP-LS protects data center operators from capacity, space and power restraints.
The optical line terminations "range" the optical network terminals or units in order to provide TDMA time slot assignments for upstream communication. For FTTH and for some forms of FTTB, it is common for the building's existing Ethernet, phone, and cable TV systems to connect directly to the optical network terminal or unit.
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