A Legacy of Kiwi Innovation
Understanding the TM9355 means understanding the self-reliant engineering spirit behind it. Sir Angus Tait returned to New Zealand in 1947 and began designing and assembling mobile radios, the forerunner of what would become Tait Electronics Ltd. The company was officially founded in Christchurch in 1969 by Sir Angus Tait and a founding team of 12 radio technologists, who went on to produce the first generation of all-transistor mobile radios in New Zealand.
That local ingenuity set the stage for decades of industry-leading work, leading directly to modern digital radios like the TM9355. Its quad-mode capability, DMR Tier 3, DMR Tier 2, MPT1327 and conventional FM in a single unit, shows the same practical flexibility that's defined Tait's approach from the start. See our deeper look at Tait Electronics' history for more on the company behind the radio.
Core Features and Advanced Capabilities
| Feature | Specification | Benefit in an NZ context |
|---|---|---|
| IP54 rating | Protected against dust ingress and water splashed from any direction | Well suited to a muddy farm, a wet construction site or a dusty quarry |
| DMR digital audio | DMR standard with noise-cancelling technology | Cuts through machinery or wind for clearer voice comms |
| Powerful transmitter | High-power output on UHF and VHF models | Helps cover the distances and hilly terrain common in NZ |
| Integrated GPS | Built-in module for real-time location tracking | Lets a dispatcher see vehicle locations on a map |
| Lone Worker mode | Automated safety monitoring | Prompts a check-in; if missed, an alert is sent to base |
| OTAP | Over-the-Air Programming | Updates a whole fleet remotely, no physical collection needed |
The TM9355's GPS tracking gives real-time visibility of vehicle locations for both efficiency and safety, and Lone Worker monitoring works by requiring a user to check in at set intervals, automatically alerting base if a check-in is missed so help can be dispatched.
Understanding the Shift to Digital DMR
Analogue signals get weaker and noisier the further you are from the source, whereas DMR delivers consistent audio right up to the edge of the coverage area. For a team, that means clearer communication and better safety, especially around heavy machinery or in a loud factory.
- Enhanced security: digital signals can be properly encrypted, stopping eavesdropping on operational chatter.
- Improved efficiency: DMR allows two separate conversations on a single radio frequency, effectively doubling channel capacity without new licences.
- Data capabilities: DMR handles text messaging and GPS tracking, giving dispatchers a real-time view of vehicles and people.
This is where the TM9355 shines, particularly with its support for DMR Tier 3, a "trunked" system suited to larger organisations. Instead of locking teams into fixed channels that can jam during busy periods, a Tier 3 system creates a shared pool of channels, automatically finding and assigning a free one for every call, a more scalable way to run a large radio network.
How NZ Industries Rely on the TM9355
Forestry and Agriculture
Picture a forestry crew deep in a remote block, miles from the nearest cell tower. The TM9355's transmitter power and clear digital audio are essential for coordinating heavy machinery, and Lone Worker gives a genuine safety net if a worker misses a check-in. On a sprawling high-country station, farmers use it to manage stock and stay connected during mustering, with a build that shrugs off mud, dust and knocks.
Logistics and Transport
For a logistics company navigating busy city traffic, integrated GPS gives a dispatcher a live view of the fleet, allowing for smarter routing and faster job allocation. Public transport operators lean on the TM9355 to keep services on schedule, with drivers reporting issues instantly and clear audio cutting through the noise of a packed vehicle.
Construction and Infrastructure
On a large site, crane operators, ground crews and surveyors all need constant contact to stay safe and keep the project on track. The TM9355's ability to manage multiple talk groups on one network lets different teams communicate on their own dedicated channels without talking over each other.
Professional Installation and Programming
Getting a TM9355 installed correctly matters for the mission-critical performance it's built for. A DIY approach risks poor performance, unreliability, or damage to the radio or the vehicle. Mobile Systems handles secure mounting away from vibration and knocks, a clean power connection to the vehicle's electrical system, and correct antenna placement to maximise range.
Professional programming configures the correct channels, talk groups and user settings, enabling private calling, group broadcasts and emergency alerts, plus the right frequencies to communicate with a base station repeater where needed. See our Tait TB7310 base station repeater for how these systems work together, or our digital mobile radio solution guide for more on the underlying technology.
