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How do DECT Cordless Phones work?
DECT systems are used in the home and office, and work up to 300m depending on the local environment. DECT operates in the radio frequency range of 1880 - 1950 MHz. The output power of DECT equipment is very low, from 0 to 0.01 watt for normal handsets and between 0.01 and 0.12 watt for the fixed base stations.
DECT is a Time Division Multiple Access (TDMA) system meaning that the radio channel it operates in is divided into a number of time slots. Each time slot can be allocated to a cordless phone handset. The DECT base station transmits a pulsed ‘beacon’ signal so that handsets connected to the base are synchronised and are ready to take a call.
When a handset receives a call, it transmits back to the base only during the allocated timeslot for that handset. That way the DECT system can have multiple telephone calls happening simultaneously. An office environment would typically have multiple base stations where as a home usually has one base unit.
http://emfnews.org/Lifewave-Cellphone-Matrix-Shield-Test.html
