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- ASTRO 25 is the next generation of ASTRO digital two-way radio communications by Motorola Solutions. Motorola first introduced digital two-way radio in the U.S. in 1991 under the name ASTRO Digital Solutions. With the completion of the APCO Project 25 standard, Motorola introduced the ASTRO 25 solution and migrated its ASTRO Digital Solutions customers to ASTRO 25. Project 25 (also known as P25) is a suite of standards for digital radio communications that is designed specifically for law enforcement, fire and medical services to communicate with each other during emergency situations. ASTRO 25 is now the most widely used P25 mission critical voice and data communication network in the world. It is designed to provide reliable and always available communication for public safety agencies. The Original ASTRO 25 format utilizes APCO Project 25 Phase I technology (FDMA). It is the most used format of the ASTRO 25 family of radio systems. The ASTRO 25 Phase II system, which complies with the P25 Phase II standard, uses TDMA technology to deliver both voice and data messaging over a single wireless communications infrastructure. Because ASTRO 25 Phase II is a P25 TDMA system, it offers greater spectrum efficiency, lower equipment costs, advanced radio features and flexibility, and longer battery life. The ASTRO 25 network also ensures encryption key assignment over the system's radio channels and enhanced network security tools. The ASTRO 25 digital radio system is claimed to provide superior audio quality and advanced features which comply with the Federal Communications Commission's narrowbanding requirements. ASTRO 25 currently operates in the 700 MHz, 800 MHz, 900 MHz, UHF and VHF bands for voice and data operation. (en)
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- ASTRO 25 is the next generation of ASTRO digital two-way radio communications by Motorola Solutions. Motorola first introduced digital two-way radio in the U.S. in 1991 under the name ASTRO Digital Solutions. With the completion of the APCO Project 25 standard, Motorola introduced the ASTRO 25 solution and migrated its ASTRO Digital Solutions customers to ASTRO 25. Project 25 (also known as P25) is a suite of standards for digital radio communications that is designed specifically for law enforcement, fire and medical services to communicate with each other during emergency situations. (en)
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