Airborne TETRA
The world's leading supplier of avionic -
standard TETRA
Chelton has the largest installed base of airborne TETRA in the world. We started by supplying the UK, but today have international users of our TETRA systems as it gained foothold in Europe and continued to become a worldwide standard. Our TETRA radio is adapted to allow it to be used across different regions and public safety sectors, all of which are still in use today in the UK, US and in many other countries around the world.
All good things must come to an end and although reliable, TETRA is limited in its capability and ageing. While durable and consistent, TETRA is not able to solely deliver the high standard of voice as well as multimedia data communications to emergency services. Most other countries, especially in Europe, are continuing to use TETRA but those who don’t currently use TETRA are investigating other technologies such as LTE.
Great Britain is one of the countries moving to integrate 4G LTE into the Emergency Services Network (ESN).

Evolution of 4G MCPTT
Please note the following products have been declared obsolete and will be replaced by the CH700 which will be available from July 2025.
- CH250-13
- CH150-14
- RH-150-13