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.

P25 Technology Partners

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

Conventional

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.

Trunked

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

Trunked

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.