Welcome to the ZyXEL Networking Glossary - your definitive source for descriptions of networking terms and ZyXEL's product features.
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In a PON, an Optical Line Terminal (OLT) is placed at broadband service provider’s central office, where it receives voice, video, and other data from the service provider’s networking servers. It then converts and transmits this data as light across a fiber optical network, where it is received and translated on the opposite end by one or more Optical Network Units (ONUs). See also ONU and PON.