What Is Project 25 (P25)?
Project 25 is a radio communications standard, not a product or a brand. It was developed to solve a critical interoperability problem for public safety agencies: before P25, an agency using one brand of radio often couldn't communicate directly with another agency using a different brand. P25 establishes a common framework so any compliant radio, regardless of manufacturer, can communicate with another.
Picture a major emergency response where Police, Fire and Emergency NZ, and ambulance services all converge on one incident. If each agency used a proprietary, incompatible system, coordinating a response would be far harder. P25 removes that barrier, letting agencies communicate on shared channels during a coordinated response.
Key Features of P25 Radio Systems
Superior Digital Voice Quality
P25's digital technology filters background noise, sirens, wind, vehicle engines, allowing intelligible voice transmission in loud environments. Unlike analogue, which degrades gradually into static as signal weakens, digital voice stays clear until the signal is lost entirely.
Robust Encryption
Unencrypted analogue signals can be intercepted with a basic scanner. P25 supports Advanced Encryption Standard (AES) protection, keeping sensitive tactical or operational communications confidential.
Data Capabilities
Beyond voice, P25 supports GPS location tracking for smarter dispatch, text and status messaging for quiet, non-urgent updates, and over-the-air programming for remote radio configuration.
P25 in the New Zealand Context
New Zealand's Public Safety Network (PSN) is delivered by SafetyNet Critical Communications, an independent Crown company. The PSN has two halves: the Land Mobile Radio network, delivered with Tait Systems NZ, and PSN Cellular Services, delivered with Hourua, roaming across Spark and One NZ for resilience.
SafetyNet's original customer base covered Police, Fire and Emergency NZ, Hato Hone St John, and Wellington Free Ambulance. That base is widening to include organisations like the National Emergency Management Agency, Surf Lifesaving New Zealand, and regional councils, reflecting a broader shift toward "communications resilience" for organisations well beyond the original four core services.
Where Mobile Systems Fits In
Mobile Systems Limited is not a primary supplier for core emergency services P25 radios, that scope sits with Tait's dedicated PSN team. What we do provide is installation, servicing, and replacement hardware for organisations already operating on the network, and as SafetyNet's customer base widens to include civil defence, emergency management, and search and rescue organisations, we're positioned to supply compatible hardware into that expanding space.
If your organisation is exploring how P25 or wider communications resilience, radio, cellular, and satellite together, fits your operational needs, we can talk through what's genuinely relevant to your situation.
