Motorola's multiband APX 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. The company demonstrated the product this month at the Association of Public Safety Communications Officials International (APCO) 2008 conference in Kansas City, Mo.

APX 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 and Time Division Multiple Access networks, and has an integrated Global Positioning System capability. It also has a custom-designed microphone that suppresses most background noise, and it can detect male and female voices.

APX meets the Project 25 (P25) multiband subscriber standards APCO designated for state, local and national organizations, Motorola officials said.

P25 is a suite of interoperability standards for digital twoway wireless communications products. It provides detailed specifications for the design of such systems. Everyone who buys P25-compatible equipment can communicate with other users of P25-compatible equipment.

APX was designed with input from public safety officials and social sciences researchers.


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