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Frequency response not being the full frequency response available in a wired landline telephone Most manufacturers claim a range of about 30 metres (98 ft) for their 2.4 GHz and 5.8 GHz systems, but inexpensive models often fall short of this claim.
The BeoCom 2 is a model of cordless telephone from 2002 [7] designed by David Lewis. [8] The handset is 321mm (≈1 foot) in length with base, and weighs 220 g (≈7.7 oz). It transmits its signals at 2.4 gigahertz in North America, and using DECT frequencies elsewhere. Production of the North American model was discontinued in 2012.
Using wired phones, which do not transmit. Using cordless phones that do not use the 2.4 GHz band. Using the 5 GHz band. DECT 6.0 (1.9 GHz), 5.8 GHz or 900 MHz phones, commonly available today, do not use the 2.4 GHz band and thus do not interfere. VoIP/Wi-Fi phones share the Wi-Fi base stations and participate in the Wi-Fi contention protocols.
Recent Gigaset and Gigaset pro cordless phones support Cat-iq 2.0 with HD Voice, allowing high-quality calls with a frequency response up to 7 kHz on VoIP/SIP phones and home gateways, using the G.722 wideband audio codec (dubbed High Definition Sound Performance (HDSP) by Gigaset).
The UK Health Protection Agency (HPA) claims that due to a mobile phone's adaptive power ability, a European DECT cordless phone's radiation could actually exceed the radiation of a mobile phone. A European DECT cordless phone's radiation has an average output power of 10 mW but is in the form of 100 bursts per second of 250 mW, a strength ...
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.