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Kellogg patented the first Intercommunicating Telephone System in 1894. It was first used in apartment buildings so people knew who was entering the apartment building.
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∙ 9y ago
ackeem johnson
kellogg
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What year was the intercom system made?
The intercom was invented in 1920 in Berlin, where doctors called it a "door telephone" and used it for night calls.
When was the intercom invented?
"Bell didn't really invent the telephone: lacked key features we associate with the phone -a ringer (invented two years after Bell's patent) -a dial (invented by Edison) Bell invented the Intercom -Edison probably did more to turn it into a telephone than anyone, We even adopt his greeting (Hello) in preferences to Bell's (Ahoy) But Bell invented something far more important -Microphones and Speakers" http://evolutionarymedia.com/cgi-bin/wiki.cgi?MediumAsInterface,template.html "Bell didn't invent the telephone, He invented microphones and speakers, As a system, he invented the intercom. Users created the telephone: By demanding ways to call multiple endpoints By requiring easier to use summons signals By creating new ways to use the telephone By adopting means of behavior" http://foulger.info/davis/presentations/spheresOfInvention.htm While Alexander Graham Bell may not have been the first to invent the telephone, he was the first to patent it. Based on his invention: "Intercommunicating Telephone System (Intercom) The Kellogg intercom phone...was patented in 1894." http://www.officemuseum.com/communications_equipment.htm
What is intercom system please suggest me how can i assembled on home?
The intercom system is a communication system. You need a electric circuit, transistors and the door bells to assemble it at home.
Can you use a intercom in Spain?
The authorities in Spain have not banned Intercom so it can be used. Motorcycle owners can use the Intercom system since it is versatile and reliable.
Where can one buy an intercom system for the home?
You might be able to find a really good security system online at different shopping sites. ADT has some really good intercom security systems on their site online. You could also find intercom security systems in your local Lowes store.
Is a Nutone home intercom system hard to install?
This depends on how you are as an individual at wiring projects. If you understand the intercom wires and how to hard wire them throughout the house then it may not be difficult. This website walks you through a general wiring job. http://homeintercomsystemsinfo.com/nutone-intercom-systems/how-to-install-a-wireless-home-intercom-system-2/
Are their camoflaged speakers and intercom system for oustide?
The Chamberlain Wireless Indoor/Outdoor portably intercom system is easy to use and carry. It blends in due to its size and the ability to be compact.
How much us a video door intercom?
Well, it really will depend upon the intercom system and the compnay you are using to do the upgrades for your home security system, there is no flat rate cost.
Tips for buying an intercom system for my home?
When shopping for an intercom system you should look for one that has a a very clear sound and is highly rated by consumers. The more research you do the better.
What are the iec specs for manufacturing intercom system equipments?
IEC-60950
Where can I find a wireless intercom system?
I would reccomend either using homesecurity.co.uk or amazon as they both sell a wide variety but if you are new to wireless intercom systems then i would recomend checking out the first site mentioned first as it has all the details so you can make an informed decision on which one you want
How much is a nutone home intercom system?
A Nutone home intercom system can cost anywhere from a few hundred dollars to a few thousand, depending on how advanced the system is. You should consult online sources to determine what level of complexity you need.
