Specifications
1–2
Chapter 1
DECT System Overview
What is DECT ?
History
DECT was born in 1988 when the European Conference of Postal and Telecommunications Ad-
ministrations (known as CEPT) decided to standardise on a Pan-European cordless communica-
tion format which would operate just below 2GHz. Later in 1988 the ownership of the DECT stan-
dard was handed over to the European Telecommunications Standards Institute (ETSI) which has
been responsible for the development of the standard since then.
What Standards Define DECT ?
ETSI regulations that define DECT are CTR-06, CTR-10, and CTR-22.
CTR
CTRCTR
CTR-
--
-06
0606
06
CTR-06 is the standard which defines all the Radio Frequency (RF) tests which need to be carried
out on the DECT physical layer. CTR-06 specifies all transmitter and receiver tests, detailing test
conditions, techniques and specifications.
CTR
CTRCTR
CTR-
--
-10
1010
10
CTR-10 is the standard which specifies the audio test requirements for DECT, making sure that
DECT equipment meets all of the required performance criteria for audio quality, distortion, etc.
CTR
CTRCTR
CTR-
--
-22
2222
22
CTR-22 defines the Generic Access Profile, the ability of a manufacturer’s equipment to operate
with every other manufacturer’s.
Specifications for DECT
DECT is a standard for cordless telecommunication among European countries adopting the
DECT as a standard for their own cordless telecommunication. DECT uses pico-cellular technol-
ogy and can handle high-density traffic. Specifications for DECT are as follows:
• Frequency: 1880-1900MHz (20MHz bandwidth)
• RF channel bandwidth: 1.728MHz
• Number of carriers: 10
• Channel spacing: 2 MHz
• Multiple access scheme: TDMA/FDMA/TDD
• Number of time slots in one: 24
• Number of duplex channels per frame: 12
• GFSK (Gaussian Frequency Shift
Keying) Modulation
• G721 ADPCM 32kHz voice coding
• Data transmission rate per one slot is
1.152Mbps
• DECT identifier and registration: The identifier is used for authentication of DECT handsets at registration, declaration of hand-
set location to the DBS, and handover.