Project 25 Compliance Assessment Program (P25 CAP)

Project 25 Compliance Assessment Program (P25 CAP)

Department of Homeland Security Compliance Assessment Program P25 CAP logo

P25 compliant, P25 CAP compliant, P25 compliant with the Statement of Requirements (P25 SOR) -- what does it all mean?

P25 CAP, a voluntary program, allows suppliers to publicly attest to their products' compliance through P25 CAP testing at DHS-recognized laboratories. As proof, suppliers are required to submit Summary Test Report (STR) and Supplier’s Declaration of Compliance (SDOC) documents. These documents are available on the Approved (Grant-Eligible) Equipment page. It is this list, and only this list, which is referenced by several federal grant programs, including the Federal Emergency Management Agency, as allowable equipment to be purchased. The varying P25 labels can be confusing, and our guide on P25 terminology explains the program and how the terms apply.

    Program Updates

    APCO 2021,  Annual Association of Public Safety Communications Officials Conference and Expo            

    July 6, 2021--P25 CAP will be presenting at the APCO 2021 Conference. The panel is titled, "Testing What Matters: Project 25 Compliance Assessment Program (P25CAP)" and will highlight S&T's P25 CAP program activities. APCO 2021 will be held August 15-18, 2021, in San Antonio, TX. Registration opens in April 2021, APCO members who register on Flash Day get a $100 discount on their registration fees. An agenda including all logistical information is forthcoming. For more information please contact

    Revised ISSI/CSSI Interoperability Test Requirements CAB and Templates

    July 5, 2021--The revised (ISSI/CSSI) Interoperability Testing Requirements Compliance Assessment Bulletin (CAB) have been published. We appreciate the input we received during the public comment period and have also published public comment tables with the comments and our responses. For a copy of the ISSI/CSSI Interoperability Test Requirements CAB, please contact

    Upcoming P25 CAP Status Update Webinar

    June 11, 2021 -- The P25 Compliance Assessment Program will hold a Status Update Webinar on Thursday, July 15th, 3:00 p.m. – 4:00 p.m. ET. Join the webinar through the following link: Join the meeting through this Teams link or dial in at +1 202-516-6093; Access Code 271 053 6#. We will share P25 CAP program updates, including: the latest on ISSI/CSSI Interoperability Testing, Feature Gap Analysis, and updates to P25 CAP documents.

    Past Events and Announcements

    Revised ISSI/CSSI Interoperability Test Requirements CAB Released for 30 Day Public Comment Period

    May 21, 2020 -- DHS S&T has prepared revisions to the current ISSI/CSSI Interoperability Test Requirements CAB draft document for public comment. To request a copy of the latest draft document, please contact After the 30-day public comment period, S&T will adjudicate all comments received and publish the final ISSI/CSSI Interoperability Test Requirements CAB on the P25 CAP Compliance Assessment Bulletin page. Please submit any suggested edits, comments or questions to by COB June 21, 2021.

    April 13, 2021 -- The P25 Compliance Assessment Program will hold a Status Update Webinar on Thursday, April 15th, 1:00 p.m. – 2:00 p.m. ET. Join the webinar through the following link or dial in at +1 202-516-6093; Access Code 776481571#. We will share P25 CAP program updates, including: the latest on Feature Gap Analysis, impacts on Emergency Cancel and updates to P25 CAP documents. Please find the April 15, 2021 P25 CAP Meeting Agenda.

    DOI Lab Accredited for ISSI/CSSI Conformance Testing

    October 7, 2020 -- News Release: DHS Recognizes DOI Lab to Perform Rigorous Testing

    About P25 CAP

    The P25 CAP is a partnership of the U.S. Department of Homeland Security’s Science and Technology Directorate, SAFECOM, industry and the emergency response community. The initial program focus is on the Common Air Interface, which allows for over-the-air compatibility between radios and tower equipment. While P25 CAP testing is not currently available for ISSI/CSSI, DHS S&T is working with the Department of Interior to establish an ISSI/CSSI test lab and formalize test procedures to include as part of P25 CAP.

    For more information on P25 CAP, watch the video and read the following overview documents listed below:

    • The Project 25 Compliance Assessment Program (P25 CAP) establishes standards and compliance test protocols for ensuring the interoperability of the digital communications equipment emergency responders use. The P25 CAP video highlights the P25 CAP Advisory Panel’s efforts to review, evaluate and update the standards to keep pace with advances in digital communications.
    • The P25 CAP Compliance: What Should it Mean to You? document provides definitions for common P25 terminology.
    • The P25 CAP Fact Sheet describes how the P25 CAP works, the value of the program to public safety, and the program’s long-term-goals.
    • The P25 CAP FAQs document addresses commonly asked questions about the program.

    P25 CAP activities are supported by Congress.

    The Intelligence Reform and Terrorism Prevention Act of 2004 established the Office for Interoperability and Compatibility (OIC) within the S&T Directorate to carry out responsibilities and authorities relating to the SAFECOM Program. The DHS Appropriations Act of 2007 refined and expanded the authorities of OIC within S&T to: support the creation of national voluntary consensus standards for interoperable emergency communications; establish a comprehensive research, development, testing and evaluation program for improving interoperable emergency communications; and encourage more efficient use of existing resources, including equipment, to achieve interoperable emergency communications capabilities.

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