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{{Short description|ETSI standard for cordless telephony}}
{{Use dmy dates|date=December 2014}}
{{more citations needed|date=September 2025}}
{{Infobox technology standard
| title = DECT
| long_name = Digital enhanced cordless telecommunications
| image = File:Радиотелефон.jpg
| image_size = 
| alt = 
| caption = [[Gigaset Communications|Gigaset]] A165 phone with [[base station]]. In DECT terminology, the phone is the 'portable part' (PP) and the base station the 'fixed part' (FP).
| abbreviation = DECT
| native_name = <!-- Name in local language. If more than one, separate using {{plain list}} -->
| native_name_lang = <!-- ISO 639-1 code e.g. "fr" for French. If more than one, use {{lang}} inside native_name items instead -->
| status = 
| year_started = <!-- {{Start date|YYYY|MM|DD|df=y}} -->
| first_published = <!-- {{Start date|YYYY|MM|DD|df=y}} -->
| version = 
| version_date = 
| preview = 
| preview_date = 
| organization = [[ETSI]], DECT Forum
| committee = 
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| base_standards = 
| related_standards = 
| predecessor = [[CT2]]{{efn|CT3 was only available as prototype and subsequently replaced by DECT}}
| successor = 
| domain = [[Cordless telephony]]
| license = 
| copyright = 
| website = {{URL|https://etsi.org/technologies/dect}}
}}

'''Digital Enhanced Cordless Telecommunications''' ('''DECT''') is a [[cordless telephone|cordless telephony]] standard maintained by [[ETSI]]. It originated in [[Europe]], where it is the common standard, replacing earlier standards, such as [[CT1]] and [[CT2]].<ref name=rohde>{{cite web |url=http://www2.rohde-schwarz.com/en/technologies/Wireless_Connectivity/DECT/information/ |title=DECT Information |website=2.rohde-schwarz.com |access-date=2 January 2018 |archive-date=1 November 2012 |archive-url=https://web.archive.org/web/20121101103059/http://www2.rohde-schwarz.com/en/technologies/Wireless_Connectivity/DECT/information/ |url-status=dead }}</ref> Since the DECT-2020 standard onwards, it also includes [[Internet of things|IoT]] communication.

Beyond Europe, it has been adopted by [[Australia]] and most countries in [[Asia]] and [[South America]]. North American adoption was delayed by [[United States]] radio-frequency regulations. This forced development of a variation of DECT called '''DECT&nbsp;6.0''', using a slightly different frequency range, which makes these units incompatible with systems intended for use in other areas, even from the same manufacturer. DECT has almost completely replaced other standards in most countries where it is used, with the exception of North America.

DECT was originally intended for fast roaming between networked base stations, and the first DECT product was [[Net3|Net<sup>3</sup>]] wireless LAN. However, its most popular application is single-cell cordless phones connected to [[plain old telephone service|traditional analog telephone]], primarily in home and small-office systems, though gateways with multi-cell DECT and/or DECT repeaters are also available in many [[Business telephone system#Private branch exchange|private branch exchange]] (PBX) systems for medium and large businesses, produced by [[Panasonic]], [[Mitel]], [[Gigaset Communications|Gigaset]], [[Ascom (company)|Ascom]], [[Cisco]], [[Grandstream]], [[Snom]], [[Polycom|Spectralink]], and RTX. DECT can also be used for purposes other than cordless phones, such as [[baby monitor]]s, [[wireless microphone]]s and industrial sensors. The [[ULE Alliance]]'s [[DECT Ultra Low Energy|DECT ULE]] and its "HAN FUN" protocol<ref>''HAN FUN'', "Home Area Network FUNctional protocol".</ref> are variants tailored for home security, automation, and the [[internet of things]] (IoT).

The DECT standard includes the [[generic access profile]] (GAP), a common interoperability profile for simple telephone capabilities, which most manufacturers implement. GAP-conformance enables DECT handsets and bases from different manufacturers to interoperate at the most basic level of functionality, that of making and receiving calls. Japan uses its own DECT variant, J-DECT, which is supported by the DECT forum.<ref>{{cite web| url = https://www.dect.org/| title = DECT Forum}}</ref>

The New Generation DECT (NG-DECT) standard, marketed as [[CAT-iq]] by the DECT Forum, provides a common set of advanced capabilities for handsets and base stations. CAT-iq allows interchangeability across [[IP-DECT]] base stations and handsets from different manufacturers, while maintaining backward compatibility with GAP equipment. It also requires mandatory support for [[wideband audio]].

[[#DECT-2020|DECT-2020]]  New Radio, marketed as NR+ (New Radio plus), is a [[5G]] data transmission protocol which meets ITU-R [[IMT-2020]] requirements for ultra-reliable low-latency and massive machine-type communications, and can co-exist with earlier DECT devices.<ref name=dect-2020-itu-r-approval/><ref name=etsi-tr-103810>[https://portal.etsi.org/webapp/workprogram/Report_WorkItem.asp?WKI_ID=62115 ETSI TR 103 810 V1.1.1 (2021-11). Final Evaluation Report on DECT-2020 NR.] ETSI, 23 November 2021.</ref><ref name=DECT_NR_plus>{{cite web|url=https://www.dect.org/userfiles/file/A.%20Current%20Documents/NRplus/DF_PR%20DECT%20NRplus_final_2022-02-24.pdf |archive-url=https://web.archive.org/web/20220224233921/https://www.dect.org/userfiles/file/A.%20Current%20Documents/NRplus/DF_PR%20DECT%20NRplus_final_2022-02-24.pdf |archive-date=2022-02-24 |url-status=live|title=ITU-R Approves DECT-2020 as New 5G Technology Standard. DECT Forum will be Promoting the Standard under the Name NR+|work=DECT Forum|date=2022-02-24}}</ref>

==Standards history==
The DECT standard was developed by [[ETSI]] in several phases, the first of which took place between 1988 and 1992 when the first round of standards were published. These were the ETS 300-175 series in nine parts defining the air interface, and ETS 300-176 defining how the units should be type approved. A technical report, ETR-178, was also published to explain the standard.<ref name=TR101178>{{cite web|url=http://www.etsi.org/deliver/etsi_tr/101100_101199/101178/01.05.01_60/tr_101178v010501p.pdf |archive-url=https://web.archive.org/web/20131112212952/http://www.etsi.org/deliver/etsi_tr/101100_101199/101178/01.05.01_60/tr_101178v010501p.pdf |archive-date=2013-11-12 |url-status=live|title=ETSI TR 101 178 V1.5.1 (2005-02). Digital Enhanced Cordless Telecommunications (DECT): A high level guide to the DECT standardization|website=Etsi.org|access-date=2 January 2018}}</ref> Subsequent standards were developed and published by ETSI to cover interoperability profiles and standards for testing.

Named Digital European Cordless Telephone at its launch by CEPT in November 1987; its name was soon changed to Digital European Cordless Telecommunications, following a suggestion by Enrico Tosato of Italy, to reflect its broader range of application including data services. In 1995, due to its more global usage, the name was changed from European to Enhanced. DECT is recognized by the [[ITU]] as fulfilling the [[IMT-2000]] requirements and thus qualifies as a [[3G]] system. Within the IMT-2000 group of technologies, DECT is referred to as IMT-2000 Frequency Time (IMT-FT).

DECT was developed by ETSI but has since been adopted by many countries all over the World. The original DECT frequency band (1880–1900&nbsp;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 (1920–1930&nbsp;MHz, or 1.9&nbsp;[[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 monitor]]s and [[wireless network]]s.

The New Generation DECT ([[#NG-DECT|NG-DECT]]) standard was first published in 2007;<ref>{{cite web|url=http://www.etsi.org/index.php/news-events/news/199-news-release-10th-may-2007dect|title=DECT reaches a New Generation|website=Etsi.org|access-date=2 January 2018|archive-date=23 August 2018|archive-url=https://web.archive.org/web/20180823073927/https://www.etsi.org/index.php/news-events/news/199-news-release-10th-may-2007dect|url-status=dead}}</ref>  it was developed by ETSI with guidance from the [[Home Gateway Initiative]] through the DECT Forum<ref>{{cite web|url=http://www.dect.org/magazine/DECT_FLIPBOOK6/DECT_Issue_006_October2016.html#p=10|title=DECT Issue 006 – October 2016|website=Dect.org|access-date=2 January 2018}}</ref> to support [[IP-DECT]] functions in [[home gateway]]/[[IP-PBX]] equipment. The ETSI TS 102 527 series comes in five parts and covers wideband audio and mandatory interoperability features between handsets and base stations. They were preceded by an explanatory technical report, ETSI TR 102 570.<ref>{{cite web|url=http://www.etsi.org/deliver/etsi_tr/102500_102599/102570/01.01.01_60/tr_102570v010101p.pdf |archive-url=https://web.archive.org/web/20131204070953/http://www.etsi.org/deliver/etsi_tr/102500_102599/102570/01.01.01_60/tr_102570v010101p.pdf |archive-date=2013-12-04 |url-status=live|title=ETSI TR 102 570 V1.1.1 (2007-03). Digital Enhanced Cordless Telecommunications (DECT); New Generation DECT; Overview and Requirements|website=Etsi.org|access-date=2 January 2018}}</ref> The DECT Forum maintains the [[CAT-iq]] trademark and certification program; CAT-iq wideband voice profile 1.0 and interoperability profiles 2.0/2.1 are based on the relevant parts of ETSI TS 102 527.

The [[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 was created to enable [[home automation]], security, healthcare and energy monitoring applications that are battery powered. Like DECT, DECT ULE standard uses the 1.9&nbsp;GHz band, and so suffers less interference than [[Zigbee]], [[Bluetooth]], or [[Wi-Fi]] from microwave ovens, which all operate in the unlicensed 2.4&nbsp;GHz [[ISM band]]. DECT ULE uses a simple star network topology, so many devices in the home are connected to a single control unit.

A new low-complexity audio codec, [[LC3 (codec)#LC3plus|LC3plus]], has been added as an option to the 2019 revision of the DECT standard. This codec is designed for high-quality voice and music applications such as wireless speakers, headphones, headsets, and microphones. LC3plus supports scalable 16-bit narrowband, wideband, super wideband, fullband, and 24-bit high-resolution fullband and ultra-band coding, with sample rates of 8, 16, 24, 32, 48 and 96&nbsp;kHz and audio bandwidth of up to 48&nbsp;kHz.<ref>{{cite web| url = https://www.etsi.org/deliver/etsi_ts/103600_103699/103634/01.01.01_60/ts_103634v010101p.pdf| title = ETSI TS 103 634 V1.1.1 (2019-08): Low Complexity Communication Codec plus (LC3plus)}}</ref><ref>{{cite web |url=https://www.etsi.org/deliver/etsi_ts/103700_103799/103706/01.01.01_60/ts_103706v010101p.pdf|title= ETSI TS 103 706 V1.1.1 (2022-01). Advanced Audio Profile}}</ref>

DECT-2020 New Radio protocol was published in July 2020; it defines a new physical interface based on [[cyclic prefix]] orthogonal frequency-division multiplexing (CP-[[OFDM]]) capable of up to 1.2{{nbsp}}Gbit/s transfer rate with [[QAM]]-1024 modulation. The updated standard supports multi-antenna [[MIMO]] and [[beamforming]], FEC [[channel coding]], and hybrid [[automatic repeat request]]. There are 17 radio channel frequencies in the range from 450{{nbsp}}MHz up to 5,875{{nbsp}}MHz, and channel bandwidths of 1,728, 3,456, or 6,912{{nbsp}}kHz. Direct communication between end devices is possible with a [[mesh network]] topology. In October 2021, DECT-2020 NR was approved for the [[IMT-2020]] standard,<ref name=dect-2020-itu-r-approval>[https://www.etsi.org/newsroom/press-releases/1988-2021-10-world-s-first-non-cellular-5g-technology-etsi-dect-2020-gets-itu-r-approval-setting-example-of-new-era-connectivity World’s first non-cellular 5G technology, ETSI DECT-2020, gets ITU-R approval, setting example of new era connectivity]. ETSI, 19 October 2021</ref> for use in Massive Machine Type Communications (MMTC) industry automation, Ultra-Reliable Low-Latency Communications (URLLC), and professional [[wireless audio]] applications with point-to-point or [[multicast]] communications;<ref>{{cite web| url = https://www.dect.org/userfiles/file/Press%20releases/DECT%20Today/DECT%20Today%20May%202018.pdf| title = DECT Today (May 2018)| access-date = 30 May 2018| archive-date = 18 April 2021| archive-url = https://web.archive.org/web/20210418074647/https://www.dect.org/userfiles/file/Press%20releases/DECT%20Today/DECT%20Today%20May%202018.pdf| url-status = dead}}</ref><ref>{{cite web| url = https://www.etsi.org/deliver/etsi_tr/103500_103599/103515/01.01.01_60/tr_103515v010101p.pdf| title = ETSI TR 103 515 V1.1.1 (2018-03): Study on URLLC use cases of vertical industries for DECT evolution and DECT-2020}}</ref><ref>{{cite web| url = https://www.etsi.org/deliver/etsi_tr/103500_103599/103515/01.01.01_60/tr_103515v010101p.pdf| title = ETSI TR 103 635 V1.1.1 (2019-11): DECT-2020 New Radio (NR) interface; Study on MAC and higher layers}}</ref> the proposal was fast-tracked by ITU-R following real-world evaluations.<ref
 name=etsi-tr-103810/><ref>[https://www.itu.int/md/R15-IMT.2020-C-0053 ITU-R R15-IMT.2020-C-0053]. Detailed schedule and actions for 'Way Forward' Option 2 related to "ETSI (TC DECT) and DECT Forum Proponent" and "Nufront Proponent" candidate technology submissions for IMT-2020</ref> The new protocol will be marketed as NR+ (New Radio plus) by the DECT Forum.<ref name=DECT_NR_plus/> [[OFDMA]] and [[SC-FDMA]] modulations were also considered by the ESTI DECT committee.<ref>{{cite web| url = http://www.etsi.org/deliver/etsi_tr/103400_103499/103422/01.01.01_60/tr_103422v010101p.pdf| title = ETSI TR 103 422 V1.1.1 (2017-06): Requirements and technical analysis for the further evolution of DECT and DECT ULE}}</ref><ref>{{cite web| url = https://www.etsi.org/deliver/etsi_tr/103500_103599/103513/01.01.01_60/tr_103513v010101p.pdf| title = ETSI TR 103 513 V1.1.1 (2019-11): DECT Technology Roadmap}}</ref>

OpenD is an open-source framework designed to provide a complete software implementation of DECT ULE protocols on reference hardware from [[Dialog Semiconductor]] and [[DSP Group]]; the project is maintained by the DECT forum.<ref>{{cite web|url= https://timecurvesoft.com/why-remote-workers-need-to-know-about-opend/ |title=Why Remote Workers Need to Know About OpenD: The Open-Source Framework Changing Digital Communication|website=timecurvesoft.com/}}</ref>

==Application==
The DECT standard originally envisaged three major areas of application:<ref name=TR101178/>
* Domestic cordless telephony, using a single base station to connect one or more handsets to the public telecommunications network.
* Enterprise premises cordless PABXs and wireless LANs, using many base stations for coverage. Calls continue as users move between different coverage cells, through a mechanism called handover. Calls can be both within the system and to the public telecommunications network.
* Public access, using large numbers of base stations to provide high capacity building or urban area coverage as part of a public telecommunications network.
* Wireless microphone systems, for Speech optimized applications with Automatic frequency and interference management.

Of these, the domestic application (cordless home telephones) has been extremely successful. The enterprise [[business telephone system#Private branch exchange|PABX]] market, albeit much smaller than the cordless home market, has been very successful as well, and all the major PABX vendors have advanced DECT access options available. The public access application did not succeed, since public cellular networks rapidly out-competed DECT by coupling their ubiquitous coverage with large increases in capacity and continuously falling costs. There has been only one major installation of DECT for public access: in early 1998 [[Telecom Italia]] launched a wide-area DECT network known as "Fido" after much regulatory delay, covering major cities in Italy.<ref>[http://www.dectweb.com/DECTForum/news/NewsLettersPDF/nl199801.pdf DECT for Cordless Terminal Mobility]. DECT Forum Newsletter. 6 March 1998</ref> The service was promoted for only a few months and, having peaked at 142,000 subscribers, was shut down in 2001.<ref>{{cite web|url=http://www.angelodenicola.it/articoli/messaggero/2000/2000_04_05.htm|title=La TELECOM spegne "Fido" – 5 aprile 2000|website=Angelodenicola.it|access-date=2 January 2018}}</ref>

DECT has been used for [[wireless local loop]] as a substitute for copper pairs in the "last mile" in countries such as India and South Africa. By using directional antennas and sacrificing some traffic capacity, cell coverage could extend to over {{convert|10|km|mi}}. One example is the [[corDECT]] standard.

The first data application for DECT was [[Net3|Net<sup>3</sup>]] wireless LAN system by Olivetti, launched in 1993 and discontinued in 1995. A precursor to Wi-Fi, Net<sup>3</sup> was a micro-cellular data-only network with fast roaming between base stations and 520&nbsp;kbit/s transmission rates.

Data applications such as electronic cash terminals, traffic lights, and remote door openers<ref name="dedected-WhatisDECT">{{Cite web |url=https://dedected.org/trac/raw-attachment/wiki/25C3/talk-25c3.pdf |title=What is DECT? |date=29 December 2008 |publisher=deDECTed.org |first=Andreas |last=Schuler |author2=Tews, Erik |author3=Weinmann, Ralf-Philipp |archive-url=https://web.archive.org/web/20161005180737/https://dedected.org/trac/raw-attachment/wiki/25C3/talk-25c3.pdf |archive-date=5 October 2016 |url-status=dead |access-date=15 September 2016 |df=dmy }}</ref> also exist, but have been eclipsed by [[Wi-Fi]], [[3G]] and [[4G]] which compete with DECT for both voice and data.

==Characteristics==
The DECT standard specifies a means for a [[portable phone]] or "Portable Part" to access a fixed telephone network via radio. [[Base station]] or "Fixed Part" is used to terminate the radio link and provide access to a fixed line. A [[Gateway (telecommunications)|gateway]] is then used to connect calls to the fixed network, such as [[public switched telephone network]] (telephone jack), office PBX, ISDN, or VoIP over Ethernet connection.

Typical abilities of a domestic DECT [[Generic access profile|Generic Access Profile]] (GAP) system include multiple handsets to one base station and one phone line socket. This allows several cordless telephones to be placed around the house, all operating from the same telephone line. Additional handsets have a battery charger station that does not plug into the telephone system. Handsets can in many cases be used as [[intercom]]s, communicating between each other, and sometimes as [[walkie-talkie]]s, intercommunicating without telephone line connection.

DECT operates in the 1880–1900&nbsp;MHz band and defines ten frequency channels from 1881.792&nbsp;MHz to 1897.344&nbsp;MHz with a band gap of 1728&nbsp;kHz.

DECT operates as a multicarrier [[frequency-division multiple access]] (FDMA) and [[time-division multiple access]] (TDMA) system. This means that the [[radio spectrum]] is divided into physical carriers in two dimensions: frequency and time. FDMA access provides up to 10 frequency channels, and TDMA access provides 24 time slots per every frame of 10{{nbsp}}ms. DECT uses [[time-division duplex]] (TDD), which means that down- and uplink use the same frequency but different time slots. Thus a base station provides 12 duplex speech channels in each frame, with each time slot occupying any available channel{{Snd}} thus 10&nbsp;×&nbsp;12&nbsp;=&nbsp;120 carriers are available, each carrying 32&nbsp;kbit/s.

DECT also provides [[frequency-hopping spread spectrum]] over [[time-division multiple access|TDMA]]/TDD structure for ISM band applications. If frequency-hopping is avoided, each base station can provide up to 120 channels in the DECT spectrum before frequency reuse. Each timeslot can be assigned to a different channel in order to exploit advantages of frequency hopping and to avoid interference from other users in asynchronous fashion.<ref>{{Cite book|url=https://books.google.com/books?id=VmPT8B-5_tAC&pg=PA587|title=Wireless Communications: Principles And Practice, 2/E|last=S|first=Rappaport Theodore|date=September 2010|publisher=Pearson Education|isbn=978-81-317-3186-4|page=587}}</ref>

DECT allows interference-free wireless operation to around {{convert|100|m|yd}} outdoors.  Indoor performance is reduced when interior spaces are constrained by walls.

DECT performs with fidelity in common congested domestic radio traffic situations.  It is generally immune to interference from other DECT systems, [[Wi-Fi]] networks, [[video sender]]s, [[Bluetooth]] technology, baby monitors and other wireless devices.

===Technical properties===
[[File:Pulse duration measurement of a DECT phone.jpg|thumb|250px|DECT pulse duration measurement (100{{nbsp}}Hz, 10{{nbsp}}ms) on channel 8]]
ETSI standards documentation ETSI EN 300 175 parts 1–8 (DECT), ETSI EN 300 444 (GAP) and ETSI TS 102 527 parts 1–5 (NG-DECT) prescribe the following technical properties:
* Audio codec:
** mandatory:
*** 32{{nbsp}}kbit/s [[G.726]] ADPCM (narrow band),
*** 64{{nbsp}}kbit/s [[G.722]] sub-band ADPCM (wideband)
** optional:
*** 64{{nbsp}}kbit/s [[G.711]] μ-law/A-law PCM (narrow band),
*** 32{{nbsp}}kbit/s [[G.729.1]] (wideband),
*** 32{{nbsp}}kbit/s [[MPEG-4 Part 3|MPEG-4 ER AAC-LD]] (wideband),
*** 64{{nbsp}}kbit/s MPEG-4 ER AAC-LD (super-wideband)
* Frequency: the DECT physical layer specifies RF carriers for the frequency ranges 1880&nbsp;MHz to 1980&nbsp;MHz and 2010&nbsp;MHz to 2025&nbsp;MHz, as well as 902&nbsp;MHz to 928&nbsp;MHz and 2400&nbsp;MHz to 2483,5&nbsp;MHz [[ISM band]] with frequency-hopping for the U.S. market. The most common spectrum allocation is 1880&nbsp;MHz to 1900&nbsp;MHz; outside Europe, 1900&nbsp;MHz to 1920&nbsp;MHz and 1910&nbsp;MHz to 1930&nbsp;MHz spectrum is available in several countries. 
** {{nowrap|1880–1900&nbsp;MHz}} in Europe, as well as South Africa, Asia, Hong Kong,<ref>{{cite web|title=Beware of Buying Radiocommunications Equipment not Meeting Prescribed Specifications|url=http://www.ofca.gov.hk/en/consumer_focus/education_corner/alerts/radiocomm/beware/index.html|publisher=Office of the Communications Authority|access-date=30 March 2014|archive-date=21 October 2019|archive-url=https://web.archive.org/web/20191021103743/https://www.ofca.gov.hk/en/consumer_focus/education_corner/alerts/radiocomm/beware/index.html|url-status=dead}}</ref> Australia, and New Zealand
** {{nowrap|1786–1792&nbsp;MHz}} in Korea
** {{nowrap|1880–1895&nbsp;MHz}} in Taiwan
** {{nowrap|1893–1906&nbsp;MHz}} (J-DECT) in Japan
** {{nowrap|1900–1920&nbsp;MHz}} in China (until 2003){{citation needed|date=January 2017}}
** {{nowrap|1910–1920&nbsp;MHz}} in Brazil
** {{nowrap|1910–1930&nbsp;MHz}} in Latin America
** {{nowrap|1920–1930&nbsp;MHz}} (DECT 6.0) in the United States and Canada
* Carriers (1.728&nbsp;MHz spacing):
** 10 channels in Europe and Latin America
** 8 channels in Taiwan
** 5 channels in the US, Brazil, Japan
** 3 channels in Korea
* Time slots: 2&nbsp;×&nbsp;12 (up and down stream)
* Channel allocation: dynamic
* Average transmission power: 10&nbsp;mW (250&nbsp;mW peak) in Europe & Japan, 4&nbsp;mW (100&nbsp;mW peak) in the US

=== Physical layer ===
The DECT [[physical layer]] uses FDMA/TDMA access with TDD.

[[Gaussian frequency-shift keying]] (GFSK) modulation is used: the binary one is coded with a frequency increase by 288&nbsp;kHz, and the binary zero with frequency decrease of 288&nbsp;kHz. With high quality connections, 2-, 4- or 8-level differential PSK modulation (DBPSK, DQPSK or D8PSK), which is similar to QAM-2, QAM-4 and QAM-8, can be used to transmit 1, 2, or 3 bits per each symbol. QAM-16 and QAM-64 modulations with 4 and 6 bits per symbol can be used for user data (B-field) only, with resulting transmission speeds of up to 5,068{{nbsp}}Mbit/s.

DECT provides dynamic channel selection and assignment; the choice of transmission frequency and time slot is always made by the mobile terminal. In case of interference in the selected frequency channel, the mobile terminal (possibly from suggestion by the base station) can initiate either intracell handover, selecting another channel/transmitter on the same base, or intercell handover, selecting a different base station altogether. For this purpose, DECT devices scan all idle channels at regular 30{{nbsp}}s intervals to generate a received signal strength indication (RSSI) list. When a new channel is required, the mobile terminal (PP) or base station (FP) selects a channel with the minimum interference from the RSSI list.

The maximum allowed power for portable equipment as well as base stations is 250&nbsp;mW. A portable device radiates an average of about 10&nbsp;mW during a call as it is only using one of 24 time slots to transmit. In Europe, the power limit was expressed as [[effective radiated power]] (ERP), rather than the more commonly used [[equivalent isotropically radiated power]] (EIRP), permitting the use of high-gain directional antennas to produce much higher EIRP and hence long ranges.

===Data link control layer===
The DECT [[media access control]] layer controls the physical layer and provides [[connection oriented]], [[connectionless]] and [[broadcasting|broadcast]] services to the higher layers.

The DECT [[data link layer]] uses Link Access Protocol Control (LAPC), a specially designed variant of the [[Integrated Services Digital Network|ISDN]] data link protocol called LAPD. They are based on [[HDLC]].

GFSK modulation uses a bit rate of 1152&nbsp;kbit/s, with a frame of 10{{nbsp}}ms (11520{{nbsp}}bits) which contains 24 time slots. Each slots contains 480 bits, some of which are reserved for physical packets and the rest is guard space. Slots 0–11 are always used for downlink (FP to PP) and slots 12–23 are used for uplink (PP to FP).

There are several combinations of slots and corresponding types of physical packets with GFSK modulation:
* Basic packet (P32){{Snd}} 420 or 424 bits "full slot", used for normal speech transmission. User data (B-field) contains 320 bits.
* Low-capacity packet (P00){{Snd}} 96 bits at the beginning of the time slot ("short slot"). This packet only contains 64-bit header (A-field) used as a dummy bearer to broadcast base station identification when idle.
* Variable capacity packet (P00''j''){{Snd}} 100&nbsp;+&nbsp;''j'' or 104&nbsp;+&nbsp;''j'' bits, either two half-slots (0&nbsp;≤&nbsp;''j''&nbsp;≤&nbsp;136) or "long slot" (137&nbsp;≤&nbsp;''j''&nbsp;≤&nbsp;856). User data (B-field) contains ''j'' bits.
** P64 (''j''&nbsp;=&nbsp;640), P67 (''j''&nbsp;=&nbsp;672){{Snd}} "long slot", used by NG-DECT/CAT-iq wideband voice and data.
* High-capacity packet (P80){{Snd}} 900 or 904 bits, "double slot". This packet uses two time slots and always begins in an even time slot. The B-field is increased to 800 bits..

The 420/424 bits of a GFSK basic packet (P32) contain the following fields:
* 32 bits{{Snd}} synchronization code (S-field): constant bit string AAAAE98AH for FP transmission, 55551675H for PP transmission
* 388 bits{{Snd}} data (D-field), including
** 64 bits{{Snd}} header (A-field): control traffic in logical channels C, M, N, P, and Q
** 320 bits{{Snd}} user data (B-field): DECT payload, i.e. voice data
** 4 bits{{Snd}} error-checking (X-field): CRC of the B-field
* 4 bits{{Snd}} collision detection/channel quality (Z-field): optional, contains a copy of the X-field

The resulting full data rate is 32&nbsp;kbit/s, available in both directions.

===Network layer===
The DECT [[network layer]] always contains the following protocol entities:
* Call Control (CC)
* Mobility Management (MM)

Optionally it may also contain others:
* Call Independent Supplementary Services (CISS)
* Connection Oriented Message Service (COMS)
* Connectionless Message Service (CLMS)

All these communicate through a Link Control Entity (LCE).

The call control protocol is derived from [[ISDN]] [[DSS1]], which is a [[Q.931]]-derived protocol. Many DECT-specific changes have been made.{{Specify|date=June 2010}}

The mobility management protocol includes the management of identities, authentication, location updating, on-air subscription and key allocation. It includes many elements similar to the GSM protocol, but also includes elements unique to DECT.

Unlike the GSM protocol, the DECT network specifications do not define cross-linkages between the operation of the entities (for example, Mobility Management and Call Control). The architecture presumes that such linkages will be designed into the interworking unit that connects the DECT access network to whatever mobility-enabled fixed network is involved. By keeping the entities separate, the handset is capable of responding to any combination of entity traffic, and this creates great flexibility in fixed network design without breaking full interoperability.

DECT [[Generic access profile|GAP]] is an interoperability profile for DECT. The intent is that two different products from different manufacturers that both conform not only to the DECT standard, but also to the GAP profile defined within the DECT standard, are able to interoperate for basic calling. The DECT standard includes full testing suites for GAP, and GAP products on the market from different manufacturers are in practice interoperable for the basic functions.

===Security===
The DECT media access control layer includes authentication of handsets to the base station using the DECT Standard Authentication Algorithm (DSAA). When registering the handset on the base, both record a shared 128-bit Unique Authentication Key (UAK). The base can request authentication by sending two random numbers to the handset, which calculates the response using the shared 128-bit key. The handset can also request authentication by sending a 64-bit random number to the base, which chooses a second random number, calculates the response using the shared key, and sends it back with the second random number.

The standard also provides [[encryption]] services with the DECT Standard Cipher (DSC). The encryption is [[key size|fairly weak]], using a 35-bit [[initialization vector]] and encrypting the voice stream with 64-bit encryption. While most of the DECT standard is publicly available, the part describing the DECT Standard Cipher was only available under a [[non-disclosure agreement]] to the phones' manufacturers from [[European Telecommunications Standards Institute|ETSI]].

The properties of the DECT protocol make it hard to intercept a frame, modify it and send it later again, as DECT frames are based on time-division multiplexing and need to be transmitted at a specific point in time.<ref name="Tews-DECT-World-2016" /> Unfortunately very few DECT devices on the market implemented authentication and encryption procedures<ref name="Tews-DECT-World-2016">Dr. DECT Secturity: Present, Past, Future. [http://www.dect.org/userfiles/file/DECT%20World%202016/Presentations/DF_DECT%20World%202016%20Presentations.zip DECT World 2016 Presentations] {{Webarchive|url=https://web.archive.org/web/20210419200215/https://www.dect.org/userfiles/file/DECT%20World%202016/Presentations/DF_DECT%20World%202016%20Presentations.zip |date=19 April 2021 }}. Erik Tews, University of Birmingham. 31 May 2016.</ref><ref name="25c3" />{{Snd}} and even when encryption was used by the phone, it was possible to implement a [[man-in-the-middle attack]] impersonating a DECT base station and revert to unencrypted mode{{Snd}} which allows calls to be listened to, recorded, and re-routed to a different destination.<ref name="25c3" /><ref name="RSA2009-DECT-Authentication">Lucks, Stefan; Schuler, Andreas; Tews, Erik; Weinmann, Ralf-Philipp; Wenzel, Matthias. [https://www.datenzone.de/blog/wp-content/uploads/2016/06/Attacks-on-the-DECT-authentication-mechanisms.pdf Attacks on the DECT Authentication Mechanisms]. Fischlin, Marc (Ed.): Topics in Cryptology{{Snd}} CT-RSA 2009, The Cryptographers' Track at the RSA Conference 2009, San Francisco, CA, USA, April 20–24, 2009.</ref><ref name="Tews-DECT-Security">Erik Tews. [http://tuprints.ulb.tu-darmstadt.de/2932/ DECT Security Analysis (Ph.D. Thesis)]. Technische Universität Darmstadt</ref>

After an unverified report of a successful attack in 2002,<ref>{{cite newsgroup|message-id=adsq2u$p00$1@wanadoo.fr|newsgroup=alt.anonymous.messages|title=Do you like ice cream?|url=https://groups.google.com/group/alt.anonymous.messages/browse_thread/thread/d311d0ebbe503835/0e28cfbc393d174c|website=Groups.google.com|access-date=2 January 2018}}</ref><ref>{{cite web |url=http://lists.gnumonks.org/pipermail/dedected/2009-January/000432.html |title=DSC{{Snd}} Reverse Engineering of the Samsung DECT SP-R6150 |date=26 January 2009 |first=Ralf-Philipp |last=Weinmann  |url-status=dead  |archive-url=https://web.archive.org/web/20120226025256/http://lists.gnumonks.org/pipermail/dedected/2009-January/000432.html |archive-date=26 February 2012 |df=dmy }}</ref> members of the deDECTed.org project actually did reverse engineer the DECT Standard Cipher in 2008,<ref name="25c3">{{cite news | url = http://www.h-online.com/security/news/item/25C3-Serious-security-vulnerabilities-in-DECT-wireless-telephony-739493.html | title = Serious security vulnerabilities in DECT wireless telephony |publisher = Heise Online | date =29 December 2008 }}</ref> and as of 2010 there has been a viable attack on it that can recover the key.<ref name="DSC-analysis">{{cite web | url = https://www.datenzone.de/blog/wp-content/uploads/2016/06/Cryptanalysis-of-the-DECT-Standard-Cipher.pdf | title = Cryptanalysis of the DECT Standard Cipher | first1 = Karsten | last1 = Nohl | first2 = Erik | last2 = Tews | first3 = Ralf-Philipp | last3 = Weinmann | date =4 April 2010 |work=Fast Software Encryption, 17th International Workshop, FSE 2010, Seoul, Korea}}</ref>

In 2012, an improved authentication algorithm, the DECT Standard Authentication Algorithm 2 (DSAA2), and improved version of the encryption algorithm, the DECT Standard Cipher 2 (DSC2), both based on [[Advanced Encryption Standard|AES]] 128-bit encryption, were included as optional in the NG-DECT/CAT-iq suite.

DECT Forum also launched the DECT Security certification program which mandates the use of previously optional security features in the GAP profile, such as early encryption and base authentication.

===Profiles===
Various access profiles have been defined in the DECT standard:
* Public Access Profile (PAP) (deprecated)
* [[Generic access profile|Generic Access Profile]] (GAP){{Snd}} ETSI EN 300 444
* Cordless Terminal Mobility (CTM) Access Profile (CAP){{Snd}} ETSI EN 300 824
* Data access profiles
** DECT Packet Radio System (DPRS){{Snd}} ETSI EN 301 649
** DECT Multimedia Access Profile (DMAP)
** DECT Evolution and Audio Solution [https://www.renesas.com/us/en/document/sds/da14495-short-form-datasheet?r=1601911 (DA14495)]<ref>{{Cite web |title=SmartBeat™ Low-Power 1.9GHz DECT |url=https://www.renesas.com/us/en/products/wireless-connectivity/dect/da14495-smartbeat-low-power-19ghz-dect-evolution-and-audio-solution}}</ref>
** Multimedia in the Local Loop Access Profile (MRAP)
** Open Data Access Profile (ODAP)
** [[Wireless local loop|Radio in the Local Loop]] (RLL) Access Profile (RAP){{Snd}} ETSI ETS 300 765
* Interworking profiles (IWP)
** DECT/[[Integrated Services Digital Network|ISDN]] Interworking Profile (IIP){{Snd}} ETSI EN 300 434
** DECT/[[GSM Interworking Profile]] (GIP){{Snd}} ETSI EN 301 242
** DECT/[[UMTS]] Interworking Profile (UIP){{Snd}} ETSI TS 101 863

== Additional specifications ==

=== DECT 6.0 ===
DECT 6.0 is a North American marketing term for DECT devices manufactured for the United States and Canada operating at 1.9&nbsp;GHz. The "6.0" does not equate to a spectrum band; it was decided the term DECT 1.9 might have confused customers who equate larger numbers (such as the 2.4 and 5.8 in existing 2.4&nbsp;GHz and 5.8&nbsp;GHz cordless telephones) with later products. The term was coined by Rick Krupka, marketing director at Siemens and the DECT USA Working Group / Siemens ICM.

In North America, DECT suffers from deficiencies in comparison to DECT elsewhere, since the [[UPCS band]] (1920–1930&nbsp;MHz) is not free from heavy interference.<ref>{{Cite web |title=DECT Frequencies, Channels, Frequency Bands {{!}} Electronics Notes |url=https://www.electronics-notes.com/articles/connectivity/dect-cordless-telephones/channels-frequencies-bands.php |access-date=2020-05-26 |website=www.electronics-notes.com}}</ref> Bandwidth is half as wide as that used in Europe (1880–1900&nbsp;MHz), the 4&nbsp;mW average transmission power reduces range compared to the 10&nbsp;mW permitted in Europe, and the commonplace lack of GAP compatibility among US vendors binds customers to a single vendor.

Before 1.9&nbsp;GHz band was approved by the FCC in 2005, DECT could only operate in unlicensed [[2.4&nbsp;GHz]] and 900&nbsp;MHz Region 2 [[ISM band]]s; some users of [[Uniden]] WDECT 2.4&nbsp;GHz phones reported interoperability issues with [[Wi-Fi]] equipment.<ref>{{Cite web |title=WDECT Phone review |url=http://www.cnet.com.au/mobilephones/phones/0,239025953,240000290,00.htm |url-status=dead |archive-url=https://web.archive.org/web/20090227073209/http://www.cnet.com.au/mobilephones/phones/0,239025953,240000290,00.htm |archive-date=27 February 2009 |access-date=3 June 2018 |df=dmy-all}}</ref><ref>{{cite web |title=Example of WI-FI and WDECT problems |url=http://www.geekzone.co.nz/forums.asp?ForumId=9&TopicId=1994}}</ref>{{unreliable source?|date=June 2018}}

North-American {{nowrap|DECT 6.0}} products may not be used in Europe, Pakistan,<ref>{{Cite web |date=2015-12-10 |title=Lists of Illegal and Legal Cordless Phones |url=https://www.pta.gov.pk/en/media-center/single-media/lists-of-illegal-and-legal-cordless-phones |access-date=2019-12-27 |website=PTA}}</ref> Sri Lanka,<ref>{{cite web |last1=Daily Mirror |title=TRC Seizes Wireless Phones |url=http://www.dailymirror.lk/129915/TRC-seizes-wireless-phones-causing-interruptions-to-mobile-G-network |access-date=8 July 2017 |website=Daily Mirror}}</ref> and Africa, as they cause and suffer from interference with the local cellular networks. Use of such products is prohibited by European Telecommunications Authorities, [[Pakistan Telecommunication Authority|PTA]], Telecommunications Regulatory Commission of Sri Lanka<ref>{{cite web |last1=TRCSL |title=The Use of DECT 6.0 Phones is illegal in Sri Lanka |url=http://www.trc.gov.lk/the-use-of-dect-6-0-cordless-phone-is-illegal-in-sri-lankla.html |url-status=dead |archive-url=https://web.archive.org/web/20200720044808/http://trc.gov.lk/the-use-of-dect-6-0-cordless-phone-is-illegal-in-sri-lankla.html |archive-date=20 July 2020 |access-date=8 July 2017 |website=TRCSL}}</ref> and the Independent Communication Authority of South Africa. European DECT products may not be used in the United States and Canada, as they likewise cause and suffer from interference with American and Canadian cellular networks, and use is prohibited by the [[Federal Communications Commission]] and [[Innovation, Science and Economic Development Canada]].

DECT 8.0 HD is a marketing designation for North American DECT devices certified with [[#CAT-iq|CAT-iq 2.0]] "Multi Line" profile.<ref>{{cite web |date=October 2017 |title=DECT Today, Issue 8 |url=http://newsletter.insight5.nl/t/ViewEmail/y/0ED5D82E76CCBAC7 |access-date=2 January 2018 |website=Newsletter.insight5.nl |page=16}}</ref>

=== NG-DECT/CAT-iq ===
{{anchor|VoIP/IP-DECT|NG-DECT|CAT-iq}}
{{main|CAT-iq|IP-DECT}}

Cordless Advanced Technology—internet and quality (CAT-iq) is a certification program maintained by the DECT Forum. It is based on New Generation DECT (NG-DECT) series of standards from ETSI.

NG-DECT/CAT-iq contains features that expand the generic GAP profile with mandatory support for high quality wideband voice, enhanced security, calling party identification, multiple lines, parallel calls, and similar functions to facilitate [[VoIP]] calls through [[Session Initiation Protocol|SIP]] and [[H.323]] protocols.

There are several CAT-iq profiles which define supported voice features:
* CAT-iq 1.0{{Snd}} "HD Voice" (ETSI TS 102 527-1): wideband audio, calling party line and name identification (CLIP/CNAP)
* CAT-iq 2.0{{Snd}} "Multi Line" (ETSI TS 102 527-3): multiple lines, line name, call waiting, call transfer, phonebook, call list, DTMF tones, headset, settings
* CAT-iq 2.1{{Snd}} "Green" (ETSI TS 102 527-5): 3-party conference, call intrusion, caller blocking (CLIR), answering machine control, SMS, power-management
* CAT-iq Data{{Snd}} light data services, software upgrade over the air (SUOTA) (ETSI TS 102 527-4)
* CAT-iq IOT{{Snd}} Smart Home connectivity (IOT) with [[DECT Ultra Low Energy]] (ETSI TS 102 939)

CAT-iq allows any DECT handset to communicate with a DECT base from a different vendor, providing full interoperability. CAT-iq 2.0/2.1 feature set is designed to support [[IP-DECT]] base stations found in office [[IP-PBX]] and [[home gateway]]s.

=== DECT-2020 ===
{{main|DECT-2020}}

DECT-2020, also called NR+, is a new radio standard by [[ETSI]] for the DECT bands worldwide.<ref name="5Gworld">{{cite web |author=Martin Rowe |date=2023-08-16 |title="The first non-cellular 5G standard: DECT NR+" |url=https://www.5gtechnologyworld.com/the-first-non-cellular-5g-standard-dect-nr/ |access-date=2023-11-21 |publisher=5G Technology World (WTWH Media LLC)}}</ref><ref name="hidden wires">{{cite web |date=2022-10-05 |title="DECT-2020: The first global non-cellular 5G technology approved" |url=https://www.hiddenwires.co.uk/news/Article/dect2020-the-first-global-noncellular-5g-technology-approved |access-date=2023-11-08 |publisher=Hiddenwires (IML Group plc)}}</ref> The standard was designed to meet a subset of the [[ITU]] IMT-2020 [[5G]] requirements that are applicable to [[Internet of things|IOT]] and [[Industrial internet of things]].<ref name="neweqdigest">{{cite web |author=Dan Shey |date=2023-02-06 |title="DECT-2020 New Radio (NR) and IoT: An Overview" |url=https://www.newequipment.com/research-and-development/whitepaper/21259557/dect2020-new-radio-nr-and-iot-an-overview |access-date=2023-11-03 |publisher=New Equipment Digest (Endeavor Business Media)}}</ref> DECT-2020 is compliant with the requirements for Ultra Reliable Low Latency Communications [[URLLC]] and massive Machine Type Communication (mMTC) of IMT-2020.

DECT-2020 NR has new capabilities <ref name="electornicsweekly">{{cite web |author=Mark Patrick, Caroline Hayes |date=2023-05-24 |title="A guide to DECT NR+ – why the world needs a non-cellular 5G wireless protocol" |url=https://www.electronicsweekly.com/news/products/rf-microwave-optoelectronics/a-guide-to-dect-nr-why-the-world-needs-a-non-cellular-5g-wireless-protocol-2023-05/ |access-date=2023-11-21 |publisher=Electronics Weekly}}</ref> compared to DECT and DECT Evolution:

* Better [[multipath]] operation ([[OFDM]] [[Cyclic Prefix]])
* Better radio sensitivity (OFDM and Turbocodes)
* Better resistance to radio interference (co-channel interference rejection)
* Better bandwidth utilization
* Mesh deployment

The DECT-2020 standard has been designed to co-exist in the DECT radio band with existing DECT deployments. It uses the same Time Division slot timing and Frequency Division center frequencies and uses pre-transmit scanning to minimize co-channel interference.

==DECT for data networks==
Other interoperability profiles exist in the DECT suite of standards, and in particular the DPRS (DECT Packet Radio Services) bring together a number of prior interoperability profiles for the use of DECT as a wireless LAN and wireless internet access service. With good range (up to {{convert|200|m|ft}} indoors and {{convert|6|km|mi}} using directional antennae outdoors), dedicated spectrum, high interference immunity, open interoperability and data speeds of around 500&nbsp;kbit/s, DECT appeared at one time to be a superior alternative to [[Wi-Fi]].<ref>{{cite news
 | url = http://scitation.aip.org/vsearch/servlet/VerityServlet?KEY=CCEJEL&smode=strresults&sort=chron&maxdisp=25&threshold=0&possible1=flatman&possible1zone=article&OUTLOG=NO&viewabs=CCEJEL&key=DISPLAY&docID=1&page=1&chapter=0
 | title = Wireless LANs: developments in technology and standards
 | publisher = IEEE Journal of Computing and Control Engineering
 | date = October 1994
}}</ref> The protocol capabilities built into the DECT networking protocol standards were particularly good at supporting fast roaming in the public space, between hotspots operated by competing but connected providers. The first DECT product to reach the market, Olivetti's [[Net3|Net<sup>3</sup>]], was a wireless LAN, and German firms [[Dosch & Amand]] and [[Hoeft & Wessel]] built niche businesses on the supply of data transmission systems based on DECT.

However, the timing of the availability of DECT, in the mid-1990s, was too early to find wide application for wireless data outside niche industrial applications. Whilst contemporary providers of Wi-Fi struggled with the same issues, providers of DECT retreated to the more immediately lucrative market for cordless telephones. A key weakness was also the inaccessibility of the U.S. market, due to FCC spectrum restrictions at that time. By the time mass applications for wireless Internet had emerged, and the U.S. had opened up to DECT, well into the new century, the industry had moved far ahead in terms of performance and DECT's time as a technically competitive wireless data transport had passed.

==Health and safety==
{{See also|Wireless electronic devices and health}}
DECT uses [[Ultra high frequency|UHF]] radio, similar to mobile phones, baby monitors, Wi-Fi, and other cordless telephone technologies.

In North America, the 4&nbsp;mW average transmission power reduces range compared to the 10&nbsp;mW permitted in Europe.

The UK [[Health Protection Agency]] (HPA) claims that due to a mobile phone's adaptive power ability, a European DECT cordless phone's radiation could actually exceed the radiation of a mobile phone. A European DECT cordless phone's radiation has an average output power of 10&nbsp;mW but is in the form of 100 bursts per second of 250&nbsp;mW, a strength comparable to some mobile phones.<ref>{{cite web |title=Health Effects from Radiofrequency Electromagnetic Fields |url=http://www.hpa.org.uk/webc/HPAwebFile/HPAweb_C/1317133827077|publisher=(UK) Health Protection Agency |access-date=10 September 2013 |author=Independent Advisory Group on Non-ionising Radiation |date=April 2012}}</ref>

Most studies have been unable to demonstrate any link to health effects, or have been inconclusive. [[Electromagnetic field]]s may have an effect on protein expression in laboratory settings<ref>{{cite journal |title=Chronic electromagnetic field exposure decreases HSP70 levels and lowers cytoprotection |pmid=11813250 |publisher=(US) Wiley-Liss, Inc |author=Vitreous State Laboratory, Catholic University of America, Washington, DC 20064, USA. |journal=Journal of Cellular Biochemistry |year=2002 |volume=84 |issue=3 |pages=447–54 |doi=10.1002/jcb.10036 |s2cid=45020298 }}</ref> but have not yet been demonstrated to have clinically significant effects in real-world settings. The World Health Organization has issued a statement on medical effects of mobile phones which acknowledges that the longer term effects (over several decades) require further research.<ref>{{cite web |url=https://www.who.int/features/qa/30/en |title=What are the health risks associated with mobile phones and their base stations? |access-date=19 January 2008 |date=5 December 2005 |work=Online Q&A |publisher=[[World Health Organization]]}}</ref>

== See also ==
* [[GSM Interworking Profile]] (GIP)
* [[IP-DECT]]
* [[CT2]] (DECT's predecessor in Europe)
* [[Net3|Net<sup>3</sup>]]
* [[CorDECT]]
* [[Wideband Digital Enhanced Cordless Telecommunications|WDECT]]
* [[Unlicensed Personal Communications Services]]
* [[Microcell]]
* [[Wireless local loop]]

==References==
{{Reflist|30em}}

== Footnotes ==
{{notelist}}

==Standards==
; ETSI EN 300 175 V2.9.1 (2022-03). Digital Enhanced Cordless Telecommunications (DECT){{Snd}} Common Interface (CI):
* {{cite web |url=https://www.etsi.org/deliver/etsi_en/300100_300199/30017501/02.09.01_60/en_30017501v020901p.pdf|title= ETSI EN 300 175-1. Part 1: Overview}}
* {{cite web |url=https://www.etsi.org/deliver/etsi_en/300100_300199/30017502/02.09.01_60/en_30017502v020901p.pdf|title= ETSI EN 300 175-2. Part 2: Physical Layer (PHL)}}
* {{cite web |url=https://www.etsi.org/deliver/etsi_en/300100_300199/30017503/02.09.01_60/en_30017503v020901p.pdf|title= ETSI EN 300 175-3. Part 3: Medium Access Control (MAC) layer}}
* {{cite web |url=https://www.etsi.org/deliver/etsi_en/300100_300199/30017504/02.09.01_60/en_30017504v020901p.pdf|title= ETSI EN 300 175-4. Part 4: Data Link Control (DLC) layer}}
* {{cite web |url=https://www.etsi.org/deliver/etsi_en/300100_300199/30017505/02.09.01_60/en_30017505v020901p.pdf|title= ETSI EN 300 175-5. Part 5: Network (NWK) layer}}
* {{cite web |url=https://www.etsi.org/deliver/etsi_en/300100_300199/30017506/02.09.01_60/en_30017506v020901p.pdf|title= ETSI EN 300 175-6. Part 6: Identities and addressing}}
* {{cite web |url=https://www.etsi.org/deliver/etsi_en/300100_300199/30017507/02.09.01_60/en_30017507v020901p.pdf|title= ETSI EN 300 175-7. Part 7: Security features}}
* {{cite web |url=https://www.etsi.org/deliver/etsi_en/300100_300199/30017508/02.09.01_60/en_30017508v020901p.pdf|title= ETSI EN 300 175-8. Part 8: Speech and audio coding and transmission}}
;ETSI TS 103 636 v2.1.1 (2024-10). DECT-2020 New Radio (NR):
* {{cite web |url=https://www.etsi.org/deliver/etsi_ts/103600_103699/10363601/02.01.01_60/ts_10363601v020101p.pdf|title= ETSI TS 103 636-1. Part 1: Overview}}
* {{cite web |url=https://www.etsi.org/deliver/etsi_ts/103600_103699/10363602/02.01.01_60/ts_10363602v020101p.pdf|title= ETSI TS 103 636-2. Part 2: Radio reception and transmission requirements}}
* {{cite web |url=https://www.etsi.org/deliver/etsi_ts/103600_103699/10363603/02.01.01_60/ts_10363603v020101p.pdf|title= ETSI TS 103 636-3. Part 3: Physical layer}}
* {{cite web |url=https://www.etsi.org/deliver/etsi_ts/103600_103699/10363604/02.01.01_60/ts_10363604v020101p.pdf|title= ETSI TS 103 636-4. Part 4: MAC layer}}
* {{cite web |url=https://www.etsi.org/deliver/etsi_ts/103600_103699/10363605/02.01.01_60/ts_10363605v020101p.pdf|title= ETSI TS 103 636-5. Part 5: DLC and Convergence layer}}
;Digital Enhanced Cordless Telecommunications (DECT):
* {{cite web |url=https://www.etsi.org/deliver/etsi_ts/103600_103699/103634/01.05.01_60/ts_103634v010501p.pdf|title= ETSI TS 103 634 V1.5.1 (2024-06). Low Complexity Communication Codec plus (LC3plus)}}
* {{cite web |url=https://www.etsi.org/deliver/etsi_ts/103700_103799/103706/01.01.01_60/ts_103706v010101p.pdf|title= ETSI TS 103 706 V1.1.1 (2022-01). Advanced Audio Profile}}
* {{cite web |url=https://www.etsi.org/deliver/etsi_en/300700_300799/300700/02.02.01_60/en_300700v020201p.pdf|title= ETSI EN 300 700 V2.2.1 (2018-12). Wireless Relay Station (WRS)}}
* {{cite web |url=https://www.etsi.org/deliver/etsi_en/300400_300499/300444/02.05.01_60/en_300444v020501p.pdf|title= ETSI EN 300 444 V2.5.1 (2017-10). Generic Access Profile (GAP)}}
* {{cite web |url=https://www.etsi.org/deliver/etsi_en/301600_301699/301649/02.03.01_60/en_301649v020301p.pdf|title= ETSI EN 301 649 V2.3.1 (2015-03). DECT Packet Radio Service (DPRS)}}
* {{cite web |url=https://www.etsi.org/deliver/etsi_en/300700_300799/300757/01.05.01_60/en_300757v010501p.pdf|title= ETSI EN 300 757 V1.5.1 (2004-09). Low Rate Messaging Service (LRMS) including Short Messaging Service (SMS)}}
* {{cite web |url=https://www.etsi.org/deliver/etsi_en/300800_300899/300824/01.03.01_60/en_300824v010301p.pdf|title= ETSI EN 300 824 V1.3.1 (2001-08). Cordless Terminal Mobility (CTM) – CTM Access Profile (CAP)}}

==Further reading==
{{refbegin}}
* {{cite book |title=Cordless Telecommunications Worldwide |publisher=Springer |year=1996 |first=Wally H.W. |last=Tuttlebee |isbn=978-3-540-19970-0}}
* {{cite book |title=Personal Wireless Communication with DECT and PWT |publisher=Artech |year=1998 |first=John A. |last=Phillips |author2=Mac Namee, Gerard |isbn=978-0-89006-872-4}}
* {{cite web |url=http://einstein.informatik.uni-oldenburg.de/rechnernetze/seite24.htm |title=Rechnernetze{{Snd}} The DECT Standard |date=13 March 2007 |access-date=2008-12-29 |author=Prof. Dr. W. Kowalk |archive-date=21 April 2023 |archive-url=https://web.archive.org/web/20230421154629/http://einstein.informatik.uni-oldenburg.de/rechnernetze/seite24.htm |url-status=dead }}
* [http://www.da-research.de/support/technical-reports Technical Report: Multicell Networks based on DECT and CAT-iq] {{Webarchive|url=https://web.archive.org/web/20201027112552/http://www.da-research.de/support/technical-reports |date=27 October 2020 }}. Dosch & Amand Research
{{refend}}

==External links==
{{Commons category|DECT telephones}}
* [http://www.dect.org/ DECT Forum] at dect.org
* [https://www.etsi.org/technologies/dect DECT information] at [[ETSI]]
* [http://www.dectweb.com/ DECTWeb.com]
* [http://dect.osmocom.org/ Open source implementation of a DECT stack]

{{Internet access}}
{{Cellular network standards}}

{{Authority control}}

[[Category:Broadband]]
[[Category:ETSI]]
[[Category:Local loop]]
[[Category:Mobile telecommunications standards]]
[[Category:Software-defined radio]]
[[Category:Wireless communication systems]]
[[Category:DECT]]