P25 Radio Communications

P25 large-scale radio networks and high-capacity volume

Apco P25 radio communication is a digital standard developed predominantly in the US for public safety applications where a requirement for interoperability with existing legacy analogue radio systems exists. It is widely used in Australia for the Government Radio Network (GRN) and is the system used by police, fire and ambulance services.

Used by public safety organisations, P25 radio communications are easy to use, tough and put emergency services in greater control of safety and response time.

P25 is also regularly used in mining environments due to its ability to work under high power to provide larger coverage areas in comparison to other technologies such as TETRA. P25 can operate in digital or analogue modes and provide easy migration from analogue and digital.


Key Features

  • ATEX and intrinsically safe rated hardware options
  • Recognised interoperability
  • Frequency flexibility
  • Fast key up times
  • Secure communications

P25 Technology Partners

Motorola Solutions APX™ P25 Series Devices

The APX™ series from Motorola was designed to meet the needs of teams operating in critical environments. Taking full advantage of the P25 digital two-way radio standard, the APX™ series provides reliable communication in all environments, guaranteed interoperability with other P25 technologies on both digital and analogue modes and a rugged construction built to handle the rigours of fieldwork.

A system developed by public safety communications officials

Offering highly reliable and secure communications, P25 radio communication ensures quality is preserved between high and weak received signals and operates in two modes:

P25 Phase 1


Offering all the simplistic benefits of a digital radio, P25 phase 1 conventional is an easy to operate two way radio system. However, the network is not suitable for large user groups, with a risk of communications becoming congested quickly.


Using the full 12.5kHz spectrum, P25 phase 1 trunked offers the benefit of private person-to-person calls and ease of data integration, such as over-the-air programming, but offers fewer support channels resulting in congestion issues.


P25 Phase 2


Delivering greater spectral efficiency, P25 phase 2 trunked offers the advantages of Time Division Multiple Access (TDMA) technology. The two-way radio communication provides two virtual channels for each 12.5kHz logical route, transmitting a double mode capacity which allows the ability to stop radios from relaying during the time of an emergency, freeing up channels.

Benefits of P25 Communications

  • Operates at a public safety grade standard
  • Protected by digital encryption for increased privacy
  • Vocoder converts voice information to digital data
  • Multiple interfaces for interoperability
  • Accommodates multiple devices on same network
P25 radio communications