Difference between revisions of "Digital 2-Way Radio"
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==DStar== | ==DStar== | ||
| − | DStar was designed for amateur radio. | + | DStar ( Digital Smart Technology Amateur Radio / D-STAR / DSTAR ) was designed for amateur radio and uses both RF and the Internet. D-STAR compatible radios are available for HF, VHF, UHF, and microwave amateur radio bands. D-STAR generally operates on VHF and UHF frequencies and allows repeaters to link with each other over the Internet. There are currently two types of DTMF switching being used with Star. |
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| + | DV is used rather than FM. DV stands for Digital Voice. In Digital Voice mode, D-STAR supports voice as well as slow speed data transmissions. | ||
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| + | DStar is NOT an open standard. DSTAR uses a closed-source proprietary voice codec (AMBE) that's patented by Digital Voice Systems, Inc. (DVSI). Even though D-STAR is not only an Icom system, the word DStar is a registered trademark of Icom. Because the voice codec is technically a form of encryption, the use of DStar shouldn't even be permitted by FCC rules. | ||
==DMR== | ==DMR== | ||
Revision as of 07:56, 19 November 2015
Kenwood NEXEDGE
Icom IDAS
NXDN is implemented by Icom in their IDAS system.
DStar
DStar ( Digital Smart Technology Amateur Radio / D-STAR / DSTAR ) was designed for amateur radio and uses both RF and the Internet. D-STAR compatible radios are available for HF, VHF, UHF, and microwave amateur radio bands. D-STAR generally operates on VHF and UHF frequencies and allows repeaters to link with each other over the Internet. There are currently two types of DTMF switching being used with Star.
DV is used rather than FM. DV stands for Digital Voice. In Digital Voice mode, D-STAR supports voice as well as slow speed data transmissions.
DStar is NOT an open standard. DSTAR uses a closed-source proprietary voice codec (AMBE) that's patented by Digital Voice Systems, Inc. (DVSI). Even though D-STAR is not only an Icom system, the word DStar is a registered trademark of Icom. Because the voice codec is technically a form of encryption, the use of DStar shouldn't even be permitted by FCC rules.
DMR
DMR is an open and published international digital radio standard that specifies the 2-slot (channel) TDMA communications. D It was developed for commercial use, however, ham radio now has approval to use DMR. MR is amateur radio's newest digital protocol.
Motorola does not own the DMR standard. MOTOTRBO is DMR. The manufacturers of DMR equipment have agreed to use the ABME2+ vocoder algorithm from DVSI Inc. - ABME2+ is licensed by DVSI Inc.
TRBO / MOTOTRBO
Motorola digital radio. Compatible with the European 2-slot DMR standard and uses Time Division Multiple Access (TDMA). MOTOTRBO has a few more features than a standard DMR radio including IP Site Connect. Motorola maintains two-slot 12.5 kHz TDMA-based systems, providing 6.25 kHz equivalency.
MOTOTRBO radios have the ability to scan an analogue and digital channel for activity.
Hytera makes a mototrbo compatible clone radio. The Hytera PD362 Digital DMR is a compatible HT. Tytera MD-380. The Tytera MD-380 digital radio uses Digital Mobile Radio (DMR) Tier 2 Standard protocol. It is compatible with the popular MOTO TRBO series Tier I and II using standard encryption, as well as other makes and models of DMR supported radios
dPMR
dPMR is an open, non-proprietary standard that was developed by the European Telecommunications Standards Institute.
