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distributed antenna system


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Definition: AIN


(Advanced Intelligent Network) The Telcordia/Bellcore version of the "intelligent network," which was the traditional public switched telephone system (PSTN). The AIN added enhanced voice, video and data services and dynamic routing capabilities by using two networks. The actual voice call was transmitted over a circuit-switched network, but the signaling was done on a separate packet-switched network known as SS7. See PSTN, IN and SS7.