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312:(MoU) group was created in 2007 by a group of companies who wished to support the latest digital PMR radio technology known as dPMR. The group currently includes radio and silicon manufacturers, protocol, software and systems developers. Members have agreed to work for the common aims of interoperability, compliance and success of dPMR. In 2011 the group was renamed the dPMR Association.
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This is the peer to peer mode of dPMR (without repeaters or infrastructure) but without the limitations of the licence-free counterpart. It can operate all typical licensed PMR frequency bands and without the RF power limits of dPMR446. As well as offering voice and data, dPMR446 Mode 1 also supports
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Because the emission mask is so tight, two 6.25 kHz dPMR signals can be used next to each other within a 12.5 kHz channel without causing interference to each other or adjacent channels. Compliance with EN301 166 at 6.25 kHz for current equipment provides some measure of guarantee that
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dPMR Mode 2 operations include repeaters and other infrastructure. This brings extra functionality such as analogue or digital network interfaces which can be IP based. Inclusion of repeaters and base stations means that wide area coverage is possible even more so when multiple repeaters are used.
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Management of the radio network starts from the authentication of radios that wish to connect. Calls are set up by the infrastructure when both parties have responded to the call request ensuring optimum use of the radio resource. Calls may be diverted to other radios, landline numbers or even IP
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interference issues will be no different with either 12.5 kHz or 25 kHz. Frequency co-coordinators in the USA have even made recommendations to the FCC about setting up new 6.25 kHz systems adjacent to existing systems, outlining parameters to avoid harmful interference.
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With all forms of technology it is vital that products from any manufacturer will interoperate without conflict. To ensure that this will be the case, ETSI has also developed and published a range of
European standards for compliance and interoperability testing.
205:(Robust Advanced Low Complexity Waveform Interpolation) vocoder, and Class M equipment uses manufacturer specific algorithm. Equipment from these different classes is not interoperable in digital mode and therefore, must revert to analog FM mode.
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addresses. The infrastructure managing these beacon channels would be capable of placing a call to another radio whether that radio is using the same site or another site within the network.
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dPMR Mode 3 can offer multichannel, multisite trunked radio networks. This ensures optimum use of spectrum and optimum density of radio traffic.
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dPMR equipment complies with the relevant
European standard ETSI EN 301 166 as well as the FCC emission mask applicable for operation in the US.
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232:(05)12. They are ideally suited to recreational and professional users who do not need wide area coverage with base stations and repeaters.
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A simplified version of the dPMR protocol intended for licence-free applications was also published by ETSI under the reference TS 102 490.
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These standards are the ETSI TS 102 587 series for dPMR446 and the ETSI TS 102 726 series for licensed dPMR Mode1, 2 and 3 products.
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dPMR446 radios comply with the ETSI TS 102 490 open standard and are limited to 500 mW RF power with fixed antennas per
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Such multiple repeaters can be managed by dynamic channel selection or they can be part of a co-channel wide area network.
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combined voice+data so it is possible to embed data into a voice call or automatically append it at the end of a call.
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for digital mobile communications. dPMR is an open, non-proprietary standard that was developed by the
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dPMR446 radios are licence-free products for use in the 446.0–446.2 MHz band within Europe.
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http://www.etsi.org/deliver/etsi_ts/102400_102499/102490/01.03.01_60/ts_102490v010301p.pdf
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dPMR446 equipment is capable of voice, data and voice+data modes of operation.
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What is significant is that dPMR achieves all this in a 6.25 kHz channel.
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dPMR supports several voice coding algorithms. Class A equipment is based on
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This means that dPMR446 can provide voice calls, text messaging (
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136:(ETSI) and published under the reference ETSI TS 102 658.
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49:. Unsourced material may be challenged and removed.
134:European Telecommunications Standards Institute
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109:Learn how and when to remove this message
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221:These are fully digital versions of
47:adding citations to reliable sources
802:Mobile telecommunications standards
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34:needs additional citations for
807:Wireless communication systems
177:Transmission rate: 4,800 bit/s
58:"Digital private mobile radio"
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723:General Electric Mobile Radio
16:Type of digital radio service
412:digital Private Mobile Radio
310:Memorandum of Understanding
154:protocol implementation by
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618:Type II SmartZone OmniLink
758:LTR Standard and Passport
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150:dPMR is very similar to
180:Modulation: four-level
201:vocoder, Class R uses
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571:Trunked radio systems
364:"ECO Domain Redirect"
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322:Digital mobile radio
304:The dPMR Association
130:common air interface
126:private mobile radio
43:improve this article
740:Logic Trunked Radio
716:distributed control
582:Central controller
395:"Icom Inc. Global"
209:dPMR functionality
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422:Interoperability
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369:. Archived from
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276:Interoperability
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464:two-way radio
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376:on 2015-04-13
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60: –
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54:Find sources:
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32:This article
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763:LTR MultiNet
753:LTR Passport
748:LTR Standard
714:Scan-based /
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378:. Retrieved
371:the original
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230:ECC Decision
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41:Please help
36:verification
33:
529:P25 phase 2
496:P25 phase 1
417:dPMR Basics
264:dPMR Mode 3
255:dPMR Mode 2
246:dPMR Mode 1
124:or digital
791:Categories
380:2012-06-24
339:References
293:Icom IDAS
69:newspapers
730:GE Marc V
466:standards
143:dPMR Logo
99:June 2010
697:Tier III
674:TETRAPOL
659:MPT-1327
481:TETRAPOL
462:Digital
333:MPT-1327
316:See also
225:radios.
768:LTR-Net
664:OpenSky
603:Type II
308:A dPMR
214:dPMR446
156:Kenwood
128:, is a
83:scholar
686:Mode 3
598:Type I
501:D-STAR
223:PMR446
203:RALCWI
199:AMBE+2
85:
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669:TETRA
649:EDACS
632:Other
519:TETRA
374:(PDF)
367:(PDF)
324:(DMR)
90:JSTOR
76:books
797:ETSI
690:NXDN
684:dPMR
679:GoTa
623:iDEN
511:TDMA
491:NXDN
486:dPMR
473:FDMA
328:NXDN
173:FDMA
160:Icom
158:and
152:NXDN
122:dPMR
62:news
701:PDT
695:DMR
524:DMR
240:SMS
182:FSK
45:by
793::
563:e
556:t
549:v
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441:v
397:.
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106:(
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97:(
87:·
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73:·
66:·
39:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
