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An Alcatel-Lucent OLT used by the French operator CityPlayOLT and ONU in fiber optic network
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).
An OLT can have several ports, and each port can drive a single PON network with split ratios or splitting factors of around 1:32 or 1:64, meaning that for each port on the OLT, up to 32 or 64 ONUs at customer sites can be connected although this depends on the PON standard the OLT and the PON network supports.[1] XGS-PON networks support split ratios of up to 1:128. An OLT with 272 ports can support up to 34,816 users assuming a split ratio of 1:128 for every port.[2][3]
The diagram below depicts an OLT within a fiber-optic network.
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(mobile network), a former manual mobile telephone network in Norway Opticallinetermination, a piece of telecommunications equipment used for fiber-optic communications...
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signal. There are two extreme cases of termination: short circuit (closed line), and open circuit (broken line). In both cases the full amplitude of the...
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that connects to a fiber optic network is known as an optical network terminal (ONT) or optical network unit (ONU). These are commonly used in fiber to...
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communication to transport audio, video, voice and data signals via plastic optical fiber (POF) (MOST25, MOST150) or electrical conductor (MOST50, MOST150)...
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