<P> DECT was developed by ETSI but has since been adopted by many countries all over the World . The original DECT frequency band (1880 MHz--1900 MHz) is used in all countries in Europe . Outside Europe, it is used in most of Asia, Australia and South America . In the United States, the Federal Communications Commission in 2005 changed channelization and licensing costs in a nearby band (1920 MHz--1930 MHz, or 1.9 GHz), known as Unlicensed Personal Communications Services (UPCS), allowing DECT devices to be sold in the U.S. with only minimal changes . These channels are reserved exclusively for voice communication applications and therefore are less likely to experience interference from other wireless devices such as baby monitors and wireless networks . </P> <P> New Generation DECT (NG - DECT) standard was first published in 2007; it was developed by ETSI with guidance from the Home Gateway Initiative through the DECT Forum . The ETSI TS 102 527 series come in 5 parts and cover wideband audio and mandatory interoperability features . They were preceded by an explanatory technical report ETSI TR 102 570 The DECT Forum maintains the CAT - iq trademark and certification program; CAT - iq wideband voice profiles 1.0 and 2.0 / 2.1 are based on relevant parts of ETSI TS 102 527 . </P> <P> DECT Ultra Low Energy (DECT ULE) standard was announced in January 2011 and the first commercial products were launched later that year by Dialog Semiconductor . The standard has been created to enable home automation, security, healthcare and energy monitoring applications that are battery powered . Like DECT, DECT ULE standard uses the 1.9 GHz band, and so suffers less interference than Zigbee, Bluetooth, Wi - Fi, from microwave ovens, which all operate in the ISM unlicensed 2.4 GHz band . DECT ULE uses a simple star network topology, so many devices in the home are connected to a single control unit . </P> <P> The DECT standard originally envisaged three major areas of application: </P>

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