Trusted Wireless 2.0

Trusted Wireless 2.0 uses the so-called FHSS (Frequency Hopping Spread Spectrum) method. The technology uses a selection of up to 127 channels from the entire spectrum of the frequency band, which it hops between on the basis of a pseudo-random pattern. This increases the robustness of the communication.

Trusted Wireless 2.0 therefore enables particularly good coexistence management of various wireless systems. Through the use of different RF (radio frequency) bands, several Trusted Wireless 2.0 systems can be operated in parallel. The option also exists to block particular channels selectively (black listing), e.g., in order to be able to operate WLAN systems in parallel without performance limitations.

In the case of a proprietary technology such as Trusted Wireless 2.0, the protocol is not publicly accessible, which means the technology is extremely well protected against attack. In addition, further security mechanisms have been implemented: the 128-bit data encryption ensures that data packets that could be intercepted in theory cannot be understood. Integrity verification checks the sender's authenticity and rejects messages that have been altered.

If radio waves are transmitted through walls or other obstacles this weakens the signal. The higher the frequency, the greater the attenuation, i.e., the attenuation for the 2.4 GHz signal is greater than that for a 868 MHz or 900 MHz signal.

Due to the higher transmission power in the 868/900 MHz band, much larger distances can be covered than in the 2.4 GHz band. In the 2.4 GHz band the transmission time is shorter and the data throughput higher than in the 868 MHz or 900 MHz band. On the one hand considerably more frequencies are available in the 2.4 GHz band; on the other hand higher data transmission rates through air are possible. Furthermore, no legally binding duty cycle must be adhered to in the 2.4 GHz band, as is the case in the 868 MHz band.

The Radioline wireless system from Phoenix Contact comprises wireless modules for 868 MHz (Europe, South Africa), 900 MHz (North America, South America), and 2.4 GHz (worldwide).