Dictionary
a communication system linking different rooms within a building or ship etc
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Wikipedia
mergefrom Intercom system (school) ]]An intercom is an electronic communications system within a building or group of buildings. Intercoms are generally composed of fixed microphone/speaker units which connect to a central control panel. A small home intercom might connect a few rooms in a house. Larger systems might connect all of the rooms in a school or hospital to a central office. Intercoms in larger buildings often function as public address systems, capable of broadcasting announcements.In many schools, tones signaling the change of classes are sounded over the intercom, taking the place of the electromechanical bell (instrument) bells used in older schools.
Basic Terms: - Master Station - These are units that can control the system, i.e., initiate a call.Sub-stations - Units not capable of initiating calls, sometimes called slave units. Door Stations - Like sub-stations, these units are not capable of initiating a call. They are typically weather-proof. Power Supply - Used to feed power to all units.An intercom may be connected to a door buzzer (see access control).
Wiring Intercoms - While every system is different, most systems have much in common. The following is based on wiring for the LEF system from Aiphone, which is a very popular brand in the Northeastern United States for residential use.These must be connected to a 12voltv direct currentDC power supply:+ Positive- NegativeOther wires include:E, or common wireC, or unit identifier. If one connects a wire color to the C screw terminal in a unit (called the 1 screw terminal in door stations), energizing that wire (by pressing the button associated with the screw terminal the wire is connected to) will initialize a call. In other words, if one attaches the pink wire to the LEF5C in the hallway, and attach the pink wire to screw terminal 4 in the LEF5C in the study, pressing button 4 in the study will energize the pink wire and the common (E) wire. This will initiate a call between the study and the hallway units, with the study unit monitoring the hallway unit.
External links - aiphone.com - Aiphone- Residential Intercom Systems leedan.com - Lee Dan - Commercial Intercom Systems Category:Telecommunications equipmentms:Interkom
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Websites
Global Intercom .com
Internet Website services/creation/maintenance WinGames Arhive
http://www.globalintercom.com/
CRETAN ELECTRONICS
LONG RANGE CORDLESS TELEPHONES 40 DIFFERENT MODELS WITH RANGE 1-100 KM AND MORE . TRANSFER THE TELEPHONE LINE FROM A BASE STATION TO 90 DIFFERENT REMOTE STATIONS , WITH FULL DUBLEX INTERCOM FROM REMOTE TO REMOTE STATIONS WITH THE BASE REPEATER . MODELS, BASE WITH HANDSETS 90 MAXIMUM FOR EVERY BASE UNIT AND MODELS BASE TO BASE . ANY INFORMATION info@cretanel.gr
http://www.cretanel.gr/
Intercom Online, Inc.
Full Service ISP providing two-way internet connectivity via satellite in the Continental US and the Caribbean.
http://www.intercom.com/
Newspapers on the Net
Listing of 10,000 newspapers from around the world, searchable by country and then by publication.
http://www.onlinenewspapers.com/
Intercom Recordings
EZ-Rollers funk-fuelled d&b site with streaming audio and vinyl mail order.
http://www.intercomrecordings.com/
Clear-Com Intercom Systems
Manufacturer of an extensive line of wired and wireless intercommunications products, including both party-line and digital matrix systems, for use in broadcast, TV fixed and mobile production, live theatre and performance, aerospace, and industrial applications.
http://www.clearcom.com/
OurWorld
Over 100,000 home pages. One of the largest communities on the Web.
http://ourworld.compuserve.com
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