Motorola demos multi-band APX comm system

Motorola APX dual-band, data and voice radio communications system


Motorola officials are tackling the decades-old problem of interoperability among first responders with a new product, the APX dual-band, data and voice radio communications system, which they are demonstrating at the APCO 2008 conference in Kansas City, Mo., this week.

APX is a system that is 15 percent smaller and 50 percent louder than the company's previous version. It works with 700/800 MHz and VHF bands, communicates with Frequency Division Multiple Access (FDMA) and Time Division Multiple Access (TDMA) networks and has integrated Global Positioning System capability. It also has a custom-designed microphone that suppresses most background noise, and can discern male and female voices.

APX meets the Project 25 (P25) multi-band subscriber standards set out by the Association of Public Safety Communications Officials International (APCO) for state, local and national organizations, Motorola officials said.

P25 is the interoperability suite of standards for digital two-way wireless communications products, and provides detailed specifications for the design of communications systems. Everyone who purchases P25-compatible equipment can communicate with other P25-compatible equipment users.

APX was designed with input from public safety officials and social science research. Motorola also applied the High Velocity Human Factors (HVHF) concept to the design of APX. HVHF is based on the idea that public safety environments operate at very high speeds. People in these situations sense, perceive, assess and react in different ways than they do in lower-velocity environments. HVHF makes a study of these responses. For example, heightened emotions in an emergency situation may affect color or sound perception.

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About the Author

Trudy Walsh is a senior writer for GCN.


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