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2. Wireless intercom - Wikipedia

   en.wikipedia.org/wiki/Wireless_intercom

   A wireless intercom is a telecommunications device that enables voice communication without the need to run copper wires between intercom stations. A wired intercom system may incorporate wireless elements. There are many types of wireless intercom systems on the market. Most wireless intercom systems communicate by radio waves using one of the ...

3. Intercom - Wikipedia

   en.wikipedia.org/wiki/Intercom

   An intercom, also called an intercommunication device, intercommunicator, or interphone, is a stand-alone voice communications system for use within a building, small collection of buildings or portably within a small coverage area, which functions independently of the public telephone network. [1] Intercoms are generally mounted permanently in ...

4. Public address system - Wikipedia

   en.wikipedia.org/wiki/Public_address_system

   Wireless Mobile Telephony (WMT) PA Systems refers to PA paging and [intercom] systems that use any form of Wireless mobile telephony system such as GSM networks instead of a centralized amplifier to distribute the audio signal to paging locations across a building or campus, or other location. The GSM mobile Networks are used to provide the ...

5. Intercoms: A History of Distance - AOL

   www.aol.com/news/intercoms-history-distance...

   The earliest intercom uses date back to the late 1960s and early 1970s, when concerts became too loud to allow for waving pieces of paper or shouting from the stage to the back of the hall.

6. Intercom device unveiled as new home security option for ...

   www.aol.com/intercom-device-unveiled-home...

   The new wifi-connected device links to a user’s current internal intercom handset and allows them to talk to and admit people at the door remotely. Intercom device unveiled as new home security ...

7. Clear-Com - Wikipedia

   en.wikipedia.org/wiki/Clear-Com

   Clear-Com, also known as ClearCom, is a manufacturer of electronic intercom products, widely used to enable stage management and crew communications in theatre, filmmaking, video and television production, concerts, professional sports competitions, special events and audiovisual presentations. Providing the first portable party-line intercom ...