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Public address system Wikipedia the free encyclopedia.
PA over IP edit. PA over IP refers to PA paging and intercom systems that use an IP network instead of a centralized amplifier to distribute the audio signal to paging locations across a building or campus or anywhere else in the reach of the IP network including the Internet. Network-attached amplifiers and intercom units are used to provide the communication function. At the transmission end a computer application transmits a digital audio stream via the local area network using audio from the computer's sound card inputs or from stored audio recordings.

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