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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 ...

4. Video door-phone - Wikipedia

   en.wikipedia.org/wiki/Video_door-phone

   Video door-phone. A video door-phone (also known as a video door entry or video intercom) is a stand-alone intercom system used to manage calls made at the entrance to a building ( residential complex, detached family home, workplace, etc.) with access controlled by audiovisual communication between the inside and outside. The main feature of ...

5. 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 ...

6. 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 ...

7. 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 ...