By installing a repeater high up (often on top of a building) the calls to the repeater are less affected by the obstructions. Signals between radios connecting directly to each other can be hampered by obstructions in the line-of-sight between them such as trees, buildings, and hills.Ī DMR repeater added to the system allows radios to send their communications via a central point which repeats the message to the rest of the system. Contact us today using the button below.ĭMR radios are able to communicate with each other directly without a centralised system, but this is not always an ideal situation.
Motorola Solutions can help you to pick the right radio technology for your requirements. However, the more stringent TETRA standard does not allow manufacturers to be flexible in the way they implement new and exciting features in the way that the DMR standard does. The higher number of tests for TETRA equipment allows public safety bodies such as the police and fire services to make separate purchase decisions without worrying about compatibility between their systems during an emergency. DMR tests only include 6 mandatory interoperability features, whereas TETRA testing requires 49 mandatory features to be tested. For comparison, TETRA products must be tested by an independent third-party featuring multiple vendors.
This is demonstrated best by the difference in interoperability testing for the two systems.ĭMR system interoperability is tested by manufacturers working together on a one-to-one basis. DMR is targeted at the commercial markets while TETRA is targeted at public safety. DMR and TETRA are both standards created by the European Telecommunications Standards Institute (ETSI) to address different types of user.
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