In a trade-off between physical characteristics, radio propagation aspects, international frequency allocation aspects and with respect to its broadband system concept, TRainCom^® HST radio systems typically operate within the microwave frequency range between 5 and 6 GHz.

Here, almost everywhere, users can take advantage of the available unlicensed frequency bands (e.g. ISM band) for radio systems.
Nevertheless, usage of this frequency band enables broadband system capabilities with high data rates, but also has some constraints e.g. with respect to potential interference with other radio applications and a restriction in radio ranges. Therefore TRainCom^® HST is available for both licensed and license-free frequency bands. Depending on national regulations, TRainCom^® systems can also be adapted to licensed or customer-specific frequency bands between 1 and 10 GHz. For special applications, radio frequencies in even higher mmW bands are also possible.

The main advantages of licensed frequencies are obvious, an elimination of interference with other radio users and therefore also lower restrictions in radio propagation. Regardless of licensed or unlicensed frequencies bands, TRainCom radio systems use their specific radio protocols, modulation schemes and medium access procedures to enable hassle-free operation in the relevant rail environment.

• Less data loss
• Independence from commercial markets
• Less infrastructure along the track

• Longterm product availability
• Increased system security