How to maintain criticality of voice over your network

The continued growth of Digital LMR is driving an increase in the sophistication of point-to-point linking functionality.


Reliability and resilience are key requirements for any backhaul network supporting mission critical communications.  However, other lesser known aspects which must be considered are:

  • Timing and prioritisation of traffic across the network
  • The combination of legacy 4 Wire services with IP traffic
  • The replacement of older analogue high power narrowband links to deliver several different services and more capacity


The role of sophisticated traffic management technologies in maintaining the criticality of voice traffic across a network where voice and data is converged is only now being fully appreciated.  Radios which can assign priority to with integrated traffic classifiers which mark packets on the radio, work to ensure critical voice is expedited ahead of other data.

“Mimomax has made DMR and P25 linking plug and play, incorporating solutions like Data Acceleration into our Tornado radios to manage traffic, and compress digital streams to just 10-15Kb/s ” says John Billows, Sales Manager for Mimomax.

“Customers increasingly need these features as standard along with a level of sophistication to deliver predictable low latency for more complex applications for simulcast and voting.  It is now common for us to deliver point-to-point links to backhaul Digital LMR as well as provide solutions for legacy 4 Wire Audio along with residual IP services for monitoring, control and OTAP,” says Billows.


What to look for:

  • Radio software which allows for compression of headers and payload to provide greater capacity over the air.  This approach means you can optimise your spectrum by running multiple applications across the same network while still ensuring that voice traffic is prioritised.   See Mimomax Data Acceleration Protocol under our Software Feature Enablers.
  • Advanced radio technologies such as MIMO to boost your capacity in narrowband channels.
  • The ability to adjust orders of modulation – dialing down the modulation rate will create more robust, fade-resistant links which can operate across longer paths.