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- | ====== P-25 ====== | ||
- | P-25 is a digital format originally developed for government applications. It was designed for interoperability and improved bandwidth efficiency. | ||
- | The equipment, repeaters, and radios have been sold to amateur radio operators on the second-hand market. | ||
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- | Some repeaters can be set to dual-mode to allow for analog and digital modes. | ||
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- | Project 25 (P25) is a set of standards produced through the joint efforts of the Association of Public Safety Communications Officials International (APCO), the National Association of State Telecommunications Directors (NASTD), selected Federal Agencies | ||
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- | P25 is an open architecture, | ||
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- | Although developed primarily for North American public safety services, P25 technology and products are not limited to public safety alone and have also been selected and deployed in other private system applications, | ||
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- | ==== P25 BENEFITS ==== | ||
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- | P25 has many various benefits in performance, | ||
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- | === Improved Audio Quality === | ||
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- | With 2800 bits per second of the total 9600 bits per second channel capacity allocated to error correction, P25 digital signals have improved voice quality over standard analog signals, especially at low or noisy RF carrier levels. The IMBE™ voice coder converts voice information into digital data and then the data is protected using error correction codes. The error correction is able to correct for small errors in the received signal. Since the audio is digitally encoded, the background noise typically present in analog systems is also removed. |