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2. George Sweigert - Wikipedia

   en.wikipedia.org/wiki/George_Sweigert

   George H. Sweigert (1920–1999) is credited as the first inventor to patent the cordless telephone. [1] Born in Akron, Ohio, Sweigert served five years in the US Army as a radio operator in World War II in Guadalcanal, Bougainville, Fiji and New Georgia assigned to the 145th Headquarters Company under the 37th Infantry Division (United States).

3. 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 ...

4. 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 onwards, it also includes IoT communication. Beyond Europe, it has been adopted by Australia and ...

5. CT2 - Wikipedia

   en.wikipedia.org/wiki/CT2

   CT2. CT2 is a cordless telephony standard that was used in the early 1990s to provide short-range proto-mobile phone service in some countries in Europe and in Hong Kong. It is considered the precursor to the more successful DECT system. CT2 was also referred to by its marketing name, Telepoint .

6. Microsoft Cordless Phone System - Wikipedia

   en.wikipedia.org/wiki/Microsoft_Cordless_Phone...

   The Microsoft Cordless Phone System (also known as PC Phone System MP-900) is a discontinued cordless telephone introduced by Microsoft in 1998 that featured personal computer integration. [2] [3] It was Microsoft's first telephone of any kind, [2] [4] and the only phone product made by the company until the Windows Mobile series of smartphones .

7. Rugged smartphone - Wikipedia

   en.wikipedia.org/wiki/Rugged_smartphone

   Rugged smartphone. A rugged smartphone is a specific type of toughened smartphone which is designed to be completely sealed within a durable housing to protect it against damage from water, shock, dust, and vibration. [ 1][ 2][ 3] Rugged smartphones are designed to survive extreme weather and temperatures, accidental damage, and rough handling ...

8. Casio G'zOne Commando - Wikipedia

   en.wikipedia.org/wiki/Casio_G'zOne_Commando

   Casio G'zOne Commando. The Casio G'zOne Commando is a smartphone which is ruggedized and runs the Android operating system. [3] It is made by NEC Casio Mobile Communications, a joint venture of three Japanese electronics makers: NEC, Casio and Hitachi. It was first released by Verizon in the United States on 28 April 2011.

9. 2.4 GHz radio use - Wikipedia

   en.wikipedia.org/wiki/2.4_GHz_radio_use

   Many of the cordless telephones and baby monitors in the United States and Canada use the 2.4 GHz frequency, [ 1] the same frequency at which Wi-Fi standards 802.11b, 802.11g, 802.11n and 802.11ax operate. This can cause a significant decrease in speed, or sometimes the total blocking of the Wi-Fi signal when a conversation on the phone takes ...