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2. Cordless telephone - Wikipedia

   en.wikipedia.org/wiki/Cordless_telephone

   A cordless telephone or portable telephone has a portable telephone handset that connects by radio to a base station connected to the public telephone network. The operational range is limited, usually to the same building or within some short distance from the base station. A cordless telephone differs functionally from a mobile telephone in ...

3. Western Electric - Wikipedia

   en.wikipedia.org/wiki/Western_Electric

   The Western Electric Company was an American electrical engineering and manufacturing company that operated from 1869 to 1996. A subsidiary of the AT&T Corporation for most of its lifespan, Western Electric was the primary manufacturer, supplier, and purchasing agent for all telephone equipment the Bell System from 1881 until 1984, when the Bell System was dismantled.

4. Western Electric hand telephone sets - Wikipedia

   en.wikipedia.org/wiki/Western_Electric_hand...

   The Western Electric hand telephone sets comprise a series of telephones that were produced from 1927 by the Western Electric Company for the American Telephone and Telegraph Company (AT&T) and the Bell System. The series features the mouthpiece ( transmitter) and the earpiece ( receiver) combined into a hand-held unit, originally named a hand ...

5. History of the telephone - Wikipedia

   en.wikipedia.org/wiki/History_of_the_telephone

   By 1904, over three million phones were connected by manual switchboard exchanges in the U.S."AT&T: History: Origins". Corp.att.com. Archived from the original on 20 August 2012. By 1914, the U.S. was the world leader in telephone density and had more than twice the teledensity of Sweden, New Zealand, Switzerland, and Norway.

6. Digital enhanced cordless telecommunications - Wikipedia

   en.wikipedia.org/wiki/Digital_enhanced_cordless...

   Digital Enhanced Cordless Telecommunications ( DECT) is a cordless telephony standard maintained by ETSI. It originated in Europe, where it is the common standard, replacing earlier standards, such as CT1 and CT2. [1] Since the DECT-2020 standard, it also includes IoT communication. Beyond Europe, it has been adopted by Australia and most ...

7. Martin Cooper (inventor) - Wikipedia

   en.wikipedia.org/wiki/Martin_Cooper_(inventor)

   A very substantial part of the DynaTAC was the battery, which weighed four to five times more than a modern cell phone. The phone had only 30 minutes of talk time before requiring a 10-hour recharge but according to Cooper, "The battery lifetime wasn't really a problem because you couldn't hold that phone up for that long!"