DECT: Difference between revisions
this is an ITU standard, it's not an "option" one can pursue or avoid - when it hits, it hits big, and it takes everything (GSM, WiFi, land lines, modems) out with it; integrating some, cut redundant
m (moved from friendly retail) |
(this is an ITU standard, it's not an "option" one can pursue or avoid - when it hits, it hits big, and it takes everything (GSM, WiFi, land lines, modems) out with it; integrating some, cut redundant) |
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"'''DECT''' (Digital Enhanced Cordless Telecommunications) is a flexible digital radio access standard for cordless communications in residential, corporate and public environments" including all [[friendly retail]]. It is related to [[Bluetooth]] and [[UMTS]] and [[WAP]] and [[GPRS]] - all are current [[ITU]] [[standard]]s, part of "the [[IMT 2000]] family concept". Some excerpts from [http://www.gsm-technology.com/gsm.php/en,unlock,subpage_id,technologie_DECT.html] | "'''DECT''' (Digital Enhanced Cordless Telecommunications) is a flexible digital radio access standard for cordless communications in residential, corporate and public environments" including all [[friendly retail]]. It is related to [[Bluetooth]] and [[UMTS]] and [[WAP]] and [[GPRS]] - all are current [[ITU]] [[standard]]s, part of "the [[IMT 2000]] family concept". Some excerpts from [http://www.gsm-technology.com/gsm.php/en,unlock,subpage_id,technologie_DECT.html] | ||
=== cuts waste === | |||
The [[healthy signal infrastructure]] would almost certainly have to rely on [[DECT]] [[standard]]s. [[Friendly retail]] should be encouraged to move this way as part of [[pilot]] projects, but [[Consumerium Services]] should ultimately rely on just one DECT [[worn device]]: reducing the number of devices to one cuts [[e-waste]]. Rather than being replaced every nine months or so, DECT phones could be expected to be useful for two or three years at first, then maybe for ten years (how often do people replace wired touchtone phones? not often) as the standard matures. DECT then replaces the existing phone infrastructure used in the friendly retail location, and provide huge advantages for multiple location organizations, and for cooperating civil groups, which can expand coverage as needed, so that "free-of-charge in-house communications between affiliated cordless handsets" might include a whole city. | |||
=== unified === | |||
"Through the utilization of the same basic technology for residential cordless phones (mass-market) up to complex multi-cell systems, DECT has an attractive and competitive cost position. DECT systems require no frequency planning during initial deployment or subsequent expansion. Once the radio infrastructure is in place, additional base stations and cordless terminals can easily and quickly be added." | "Through the utilization of the same basic technology for residential cordless phones (mass-market) up to complex multi-cell systems, DECT has an attractive and competitive cost position. DECT systems require no frequency planning during initial deployment or subsequent expansion. Once the radio infrastructure is in place, additional base stations and cordless terminals can easily and quickly be added." | ||
"high concentrations of users... up to 100,000 users in any km� office area... densely-occupied office buildings, public and residential areas." | "high concentrations of users... up to 100,000 users in any km� office area... densely-occupied office buildings, public and residential areas." | ||
=== compatible === | |||
"DECT very efficiently uses the available radio spectrum in the standard bands (1880-1900 MHz, 1900-1920 MHz, or 1910-1930 MHz). Various applications can share the spectrum, e.g. voice and data, or public and private applications." | "DECT very efficiently uses the available radio spectrum in the standard bands (1880-1900 MHz, 1900-1920 MHz, or 1910-1930 MHz). Various applications can share the spectrum, e.g. voice and data, or public and private applications." | ||
"The combination of TDMA/TDD digital radio technology and dynamic channel selection with additional encryption techniques, authentication and identification procedures, makes DECT radio transmissions extremely secure against unauthorized radio eavesdropping by third parties." | "The combination of TDMA/TDD digital radio technology and dynamic channel selection with additional encryption techniques, authentication and identification procedures, makes DECT radio transmissions extremely secure against unauthorized radio eavesdropping by third parties." | ||
=== ISDN/MP3/FM "radio" quality audio === | |||
"Speech quality in a DECT system is very high, thanks to the digital radio techniques applied. ADPCM digital voice coding technology also ensures compatibility with ISDN. In a multi-cell system such as a cordless PBX, handover from cell to cell is fully transparent to the user." | "Speech quality in a DECT system is very high, thanks to the digital radio techniques applied. ADPCM digital voice coding technology also ensures compatibility with ISDN. In a multi-cell system such as a cordless PBX, handover from cell to cell is fully transparent to the user." | ||
"A single-cell DECT cordless phone gives users much better speech quality, functionality and security than could be obtained with previous generations of cordless phones. It also provides free-of-charge in-house communications between affiliated cordless handsets." | "A single-cell DECT cordless phone gives users much better speech quality, functionality and security than could be obtained with previous generations of cordless phones. It also provides free-of-charge in-house communications between affiliated cordless handsets." This no-charge high-quality makes it effectively a form of [[radio]] for our [[friendly retail]] applications. | ||
There are excellent reasons for [[civil society]] groups to adopt DECT high quality audio, since it actually makes their officers and representatives instantly available for crisp radio interviews more or less all the time. If there's a choice between someone accessible only by conventional phone who may need to come in to some office to use an ISDN phone for an interview, and one who is instantly available at that higher quality via their DECT phone, it's a reasonable assumption that the more available person will be interviewed more. | |||
=== data === | |||
"Data applications are becoming more and more important in all areas mentioned so far. Low data rate applications such as [[barcode reader]]s can as well be served as advanced application like [[Internet access]]. Today, DECT products provide data links with up to 552 kbit/s. New modulation schemes will rapidly allow the rate to grow up to 2 Mbit/s." Either is sufficient for high quality[[audio]] but not [[video]]. | "Data applications are becoming more and more important in all areas mentioned so far. Low data rate applications such as [[barcode reader]]s can as well be served as advanced application like [[Internet access]]. Today, DECT products provide data links with up to 552 kbit/s. New modulation schemes will rapidly allow the rate to grow up to 2 Mbit/s." Either is sufficient for high quality[[audio]] but not [[video]]. | ||
It's "equally suited for data and voice services in all environments," and scales: | |||
=== scaling and handover === | |||
"... be it for a single line with one cordless phone, or for a large-scale system with several thousand users on various sites... In a multi-cell system such as a cordless PBX, [[handover]] from cell to cell is fully transparent to the user." This allows for "seamless mobile communications environment serving just a few up to several thousand users on one or more sites. The DECT digital radio technology permits very high densities of users to be served, in a secure and robust way and to profit by both voice and data services with a single infrastructure" Again this is critical for the larger [[friendly retail]]er. | |||
In [[Wireless Local Loop]] (WLL) for the mobile user it's "a rapidly available, low-cost, high-quality radio alternative to wired subscriber local loops, to bring public network voice and data services to subscribers." It can thus replace all existing [[WiFi]], [[cell]] and land-line services. | |||
=== dual mode === | |||
"It enables quick network deployment, coverage to be built up as needed, and can be used as a replacement for the wireline, thereby reducing the initial capital investment for the operator... DECT and [[GSM]] networks, for example, can combine with the complementary strengths of both standards, to give users full mobility with integrated [[dual-mode handset]]s." | |||
=== References === | === References === | ||
*[http://www.gsm-technology.com/gsm.php/en,unlock,subpage_id,technologie_DECT.html www.gsm-technology.com entry with full description], from which above is excerpted | *[http://www.gsm-technology.com/gsm.php/en,unlock,subpage_id,technologie_DECT.html www.gsm-technology.com entry with full description], from which above is excerpted | ||