DECT Technical Standards
The Baseline Standards
The early DECT standards were developed by the original RES 03 committee (RES = Radio Equipment and Systems Committee) which was at that time responsible for DECT and other cordless technology standards. The first and most well known of the DECT standards, which formed the baseline of the technology, were the ETS 300 175 documents, published in 1992, which specified the basic DECT radio access technology. The various chapters of this standard document are listed elsewhere on this site and described in more detail in 'Cordless Telecommunications Worldwide', along with many of the other DECT standards documents. The baseline standards were upgraded in 1995 to a second edition, to reflect both progress in the technology (a tightening of some technical parameters) and in the global market (the impact of DECT on the North American PCS scene, where changes had been made to the DECT standard to yield the PWT standard and the concept of wireless relay stations pioneered).
Many other standards relating to DECT have also been produced by ETSI. Some of these relate to testing compliance with the technical standards, some are technical reports (ETRs) explaining how the technology may optimally be used, some are extensions to the original standards to reflect new applications.The DECT Profiles
A key class of ETSI standards documents is that known as the DECT Profiles. These include, amongst others:
The Generic Access Profile GAP
The profiles essentially draw upon other prior ETSI standards documents, defining which aspects of which ones should be implemented in order to fulfill a specific application. This approach allows low cost DECT products to be manufactured for commodity type applications, such as a domestic cordless telephone, whilst also allowing highly featured applications to also be produced for less cost-sensitive markets, in a way that ensures, where appropriate, full vendor interoperability of products - ie open standards. Such standards encourage market growth (as has been seen most obviously with the global acceptance of the GSM standard for mobile phones)
DECT Data Standards
During 1998/99 the ETSI DECT Project has developed two key new standards relating to data transmission:
The DECT Packet Radio Service - DPRS
The DECT Multimedia Access Profile - DMAP
DPRS is in reality simply an update and pulling together of the several data transmission profiles - A/B, C, D, E and F, Classes 1 and 2 - that were specified in the early/mid 1990's into a more useable form. It is anticipated that DPRS will allow interoperability between DECT data products in the same way that the GAP specification has done for DECT speech products.
Similarly, DMAP builds on DPRS, bringing it together with GAP, to support multimedia services over DECT products, to allow plug-n-play wireless interoperability between DMAP enabled PC's, printers, cameras, etc in the home and SoHo environment. For information on DMAP, please check out the DECT Multi Media Consortium information on the Multimedia & Home Networking Page of DECTweb.
ETSI Activities Today
As of 2001, the ETSI DECT Project is led by Guenther Kleindl of Siemens Austria, supported by Dag Akerberg of Ericsson Sweden and Stoyan Baev, of Ascom Switzerland, each of whom lead a Working Group.
Click here to see the terms of reference for the ETSI DECT activity (dated 1996 !).
ETSI has a formal collaboration agreement with the industry body, the DECT Forum, details of which may be downloaded from the latter's website.
During 1999 the ETSI committees have focussed on the introduction of new high level modulation schemes which will double or triple the data rates which DECT can support, allowing it to provide 2Mb/s data rates. This has allowed it to be submitted to the ITU for incorporation as one of the IMT family of radio standards for third generation, 3G, radio systems.
ETSI has also introduced the concept of Application Specific Access Profiles - ASAP's - of which DMAP is the first.Getting Information from ETSI
On the attached pages may be found a comprehensive list of the relevant DECT specifications produced by ETSI. Copies of these may be downloaded directly from the ETSI website. The ETSI website also contains a wealth of other useful information - details of how to obtain this are contained on our page - Guide to ETSI DECT Resources.
ETS = ETSI Telecommunication Standard. ETSI has adopted the term EN = Europäische Norm (English: European Standard) in 1996, in line with CEN and CENELEC, to refer to new documents of this type produced by ETSI.