DMR Simulcast

DMR Simulcast

Multiple ECOS-D radios are typically connected together using an IP core network to form a simulcast network. The synchronization of the simulcast network is either performed via external GPS antennae and/or via the integrated Precision Time Protocol (IEEE 1588v2).


The key benefits of a digital simulcast network are:

  • No manual channel switching necessary when moving between cells
  • No dropped calls when moving between cells
  • Frequency economy in terms of licensing, i.e. the same radio channel is used at all fixed-location radio stations



Frequency range

4m, 2m and 70cm


Operating mode

The simulcast network can be configured to operate in conventional (Tier II) mode or in trunking mode (Tier III). In conventional mode a 12.5 kHz radio channel provides two communication channels for simultaneous and independent communication.



Over the whole area of coverage the following services can be used, provided the appropriate terminal devices are available:

  • Digital voice services, i.e. via DMR (individual call, group call, all call)
  • Digital data services via SDS (short data messages) or IP

Depending upon the mode, analog voice services can be used with existing or DMR terminal devices.


By adding further infrastructure components, dispatcher services and telephone call services to simple wired terminal devices or to existing extension telephones can be realized.



Irrespective of the operating mode, the coverage of the simulcast network can be extended (i.e. through the addition of a further location) or its capacity can be expanded (i.e. by a further radio channel).