dPMR is a 6.25 kHz FDMA based digital radio protocol described in the ETSI technical standards TS 102 490 and TS 102 658. The TS 102 490 standard defines dPMR 446 license-free radio and the TS 102 658 defines Mode 1 peer-to-peer mode, Mode 2 repeater mode and Mode 3 digital trunking. dPMR is specifically targeting highly functional solutions by using lower cost and less complex technology. Details of the dPMR protocol can be found on the dPMR Association website. (http://www.dpmr-mou.org)
|TS 102 490||Tier 1||-||License-free (dPMR 446)|
|Mode 1||Direct Peer-to-peer Mode|
|TS 102 658||Tier 2||Mode 2||Conventional Repeater Mode|
|Mode 3||Digital Trunking Mode|
Currently, the broad range of products and services including telecommunication, broadcast and information services use digital technology and the PMR (Private Mobile Radio) market is no exception. The move toward digital systems started over a decade ago and this trend is still growing rapidly. The merits of moving from analogue to digital are outlined below.
The dPMR standard is delivered under the initial responsibility of the dPMR MoU group under the mandate of ETSI. The dPMR MoU group selected the standard vocoder and will perform interoperability and conformance testing using ETSI standards. Through evaluation testing, dPMR equipment will interoperate with each other, ensuring longevity of the system, a multi-vendor environment and a good return on investment.
The dPMR standard also defines a centralized trunked network mode (Mode 3) similar to the analogue MPT 1327 trunking in configuration and operation. *