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Harris County no longer provides a list of approved radios.  Harris County now relies on the Project 25 (P25) Compliance Assessment Program (CAP)    to verify any manufacturer’s radio interoperability for Project 25. Project 25 refers to a suite of TIA (Telecommunication Industry Association) standards for digital radio communications.  Manufacturers have invested significant technical resources to develop P25 and TIA standard radio platforms to enable standards based interoperable communications. Any two way radio manufactured and designed to the Project 25 Standard that has passed the CAP testing are meeting our customer’s need for mission critical communication and therefore should work on the Regional Radio System. 


Harris County does require all new radios activated include the RADIO AUTHENTICATION and PHASE II TDMA options identified in the P25 standard.








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