Quick understanding of POI system in one article

　　POI stands for Point of Interface, which is a multi system integration platform. Mainly used for multi frequency band and multi signal combination, achieving compatible coverage of multiple network signals. Realize multi system, multi frequency band signal transmission and reception combined with cable splitting: meet the requirements of multiple standards such as DTV, 2G, 3G, 4G, 5G (supporting LTE MIMO), etc.

　　POI is mainly used for indoor coverage in large buildings such as convention centers, exhibition halls, subways, train stations, airports, and government offices. This system uses frequency combiners and bridge combiners to combine mobile signals from multiple operators and standards, and introduces a feeder distribution system to fully utilize resources and avoid repeated investment in indoor distribution system construction.

　　To avoid interference, POI is divided into two platforms, uplink and downlink, which separate the transmission of uplink and downlink signals. POI serves as a bridge connecting wireless communication donor signals with distributed coverage signals (such as leaky cables and antenna arrays). Its main function is to combine and separate the uplink and downlink RF signals of various operators, and filter out interference components between different frequency bands.

　　The main function of the uplink part of POI is to collect signals from different standard mobile phones through antennas and transmit them to the uplink POI through feeders. After POI detects signals in different frequency bands, they are sent to base stations of different operators.

　　The main function of the POI downlink part is to synthesize carrier signals from various operators and different frequency bands and send them to the antenna distribution system in the coverage area.

　　Product features:

　　(1) Signal combining for mobile communication devices and signal splitting for antenna distribution systems.

　　(2) Suppress useless signals;

　　(3) Filtering and transmitting signals from mobile communication devices and antenna distribution systems;

　　(3) Real time and accurate monitoring function.

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