In the first cross-border TETRA roaming and interoperability trial of its kind, users of the Swedish and German TETRA public safety networks were able to intercommunicate during a collaborative exercise on the southern Baltic Sea.

Through an interconnection provided by Cassidian, users of Germany’s BOS radio network were able to maintain radio communication with their colleagues, using their BOS radios, while they were in the Swedish Rakel network area. In addition, German and Swedish operators were able to use radios and dispatchers to talk to each other during the exercise.The trial demonstrated that TETRA group calls, individual calls, Short Data Service (SDS) messages and mobility management of radios can all work across network borders.

Cassidian comments that its success means that TETRA networks no longer need to be interconnected through analogue and PABX interfaces – and that abandoning the majority of TETRA services in order to achieve interconnectivity is not necessary either.