Optical line termination
From Infogalactic: the planetary knowledge core
File:OLT Alcatel CityPlay Amiens.jpg
An Alcatel-Lucent OLT used by the French operator CityPlay
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 network.
- to coordinate the multiplexing between the conversion devices on the other end of that network (called either optical network terminals or optical network units).
The diagram below depicts an OLT within a fiber-optic network.
File:Client-side Line-Side Defns.jpg
OLT & ONU in Fiber Optic Network
Features
Lua error in package.lua at line 80: module 'strict' not found. OLTs include the following features:
- A downstream frame processing means for receiving and churning an asynchronous transfer mode cell to generate a downstream frame, and converting a parallel data of the downstream frame into a serial data thereof.
- A wavelength division multiplexing means for performing an electro/optical conversion of the serial data of the downstream frame and performing a wavelength division multiplexing thereof.
- An upstream frame processing means for extracting data from the wavelength division multiplexing means, searching an overhead field, delineating a slot boundary, and processing a physical layer operations administration and maintenance (PLOAM) cell and a divided slot separately.
- A control signal generation means for performing a media access control (MAC) protocol and generating variables and timing signals used for the downstream frame processing means and the upstream frame processing means.
- A control means for controlling the downstream frame processing means and the upstream frame processing means by using the variables and the timing signals from the control signal generation means.
