DECT Specification Summary

- a tabular overview of the main features of DECT technology.

The DECT cordless phone system has gain widespread acceptance. Many millions of DECT phones are in use around the world, its use spreading well beyond the boundaries of Europe where it was originally envisaged it would be used, and it is used in well over 100 countries around the globe.

The standard for DECT or Digital Enhanced Telecommunications system was developed by members of the European Telecommunications Standards Institute (ETSI). This standard defines specification for the system and the way in which it operates. The salient features for DECT are defined below:

Parameter	Specification
Frequency band	1880 MHz to 1900 MHz
Access technique	MC/TDMA/TDD
Symbol rate	1152 k Symbol/s
Carrier spacing	1728 kHz
Frame duration	10 ms
Access channels/RF carrier	12 duplex 32 k bit/s channels
Traffic channels/single radio	TRX 12
Traffic Channel assignment	Instant dynamic
Control carriers	Not required
Modulation	GFSK (BT = 0,5) and optional higher level Modulation schemes possible
LO stability	25 ppm
Portable average RF power	10 mW
Portable peak RF power	240 mW 24 dBm
Speech codec	32 kbit/s ADPCM
Base Station sensitivity at 0,1 % BER	-86 dBm (for GAP) (typically -90 dBm to -94 dBm)
Basic link budget	110 dBm (Typ.114 dBm to 118 dBm)
Protected 64 kbit/s bearer service	Yes
Base station antenna	Diversity Switched. Post detection selection optional Dual antennas in handset Optional
Tolerance to time dispersion with selection antenna diversity	200 ns (500 ns possible with low-cost non-coherent equalizer)

DECT Summary

The DECT cordless phone system is now a well established standard that is widely used for domestic as well as business applications. With the extensions that are now available to the standard, it has become a very flexible system, and this is much of the reason for the success of the DECT cordless phone system.