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RU

RU (Radio Unit) or RRU (Remote Radio Unit) in wireless networks is a radio transceiver that connects to the Baseband Unit (BBU) of a base station.

The RU contains the base station's RF circuitry plus analog-to-digital/digital-to-analog converters and up/down converters. RUs also have operation and management processing capabilities and a standardized optical interface to connect to the rest of the base station.

When deployed as part of a DAS infrastructure, RUs are usually connected with a DAS Head-End via fiber optic cable.

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