The WLM employs frequency hopping spread spectrum (FHSS) technology, where the transmitter changes the frequency at which it is broadcasting in a random pattern.
Moore Industries’ WLM Wireless Link Module provides accurate, reliable and secure wireless connectivity between remote field sites, and employs frequency hopping spread spectrum technology and 32-bit CRC error correction for secure, robust communications.
The WLM supports either Ethernet or serial (RS-485) communications at speeds up to 188 kbps and ranges up to 25 miles, and operates at FCC license-free frequency ranges of 902-928MHz or 2.4-2.483GHz.
Many users are concerned that wireless communications can be “hacked” into by intruders. For increased security, the WLM employs frequency hopping spread
spectrum (FHSS) technology, where the transmitter changes the frequency at which it is broadcasting in a random pattern. Only a receiver programmed with the exact same algorithm is able to listen to and follow the message. Of all the wireless technologies on the market, FHSS is the most secure.
For an intruder to successfully tune into a WLM system, he needs to know the frequencies used, the hopping sequence, the dwell time, and any included encryption. Given that for the 2.4 GHz band the maximum dwell time is 400msec over 75 channels, it is almost impossible to detect and follow a FHSS signal if the receiver is not configured properly.
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