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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

    Ongoing CAB and Test Case Reviews

    September 5, 2019 -- We are adjudicating all comments we’ve received on the draft Testing Rules CAB and Baseline ISSI/CSSI Interoperability Testing Requirements CAB and templates, and we expect to finalize those documents this month. In addition, we are continuing to review the ISSI/CSSI Conformance Test Cases. Take a look at our August Program Updates to see what we’ve been working on.

    P25 CAP AP Task Force now under SAFECOM

    September 5, 2019 -- DHS has moved the P25 CAP Advisory Panel (AP) under the SAFECOM governance structure, which is managed by the DHS Cybersecurity and Infrastructure Security Agency (CISA). This transition provides P25 CAP activities with a broader audience via SAFECOM users and leverages the legislative authority that SAFECOM maintains in support of emergency communications. The current AP membership will remain the same with the P25 CAP AP Task Force (TF). This transition only involves the AP changing to a SAFECOM TF. There are no changes to P25 CAP at large, which remains under DHS S&T.

    Baseline ISSI/CSSI Conformance Testing Requirements CAB and templates Now Published

    June 12, 2019 -- The Baseline Inter-Radio Frequency Sub-System Interface and Console Sub-System Interface (ISSI/CSSI) Conformance Testing Requirements Compliance Assessment Bulletin (CAB) is finalized. Thank you to all those who have submitted comments. There is an accompanying comment matrix that outlines the comments received. The test cases for ISSI/CSSI conformance testing address: ISSI testing of a RFSS, CSSI testing of a RFSS, and CSSI testing of a CSS. The test case documentation, pass/fail criteria document, and Supplier’s Declaration of Compliance and Summary Test Report templates are available by request to

    Past Events and Announcements

    Tuesday, August 13, 2019 -- P25 CAP Working Group Meeting

    August 9, 2019 -- A Joint SAFECOM/NCSWIC P25 CAP Working Group (CAPWG) meeting will be held on Tuesday, August 13, 2019. Please join us at the Hilton Baltimore, Paca Room on the 3rd floor from 1 p.m. – 2:30 p.m. Stakeholders who are unable to attend in person can call in to 855-852-7677. The access code is 9999-1882-3362.

    July 8 -- DHS-Sponsored Webinar on P25 Compliance Assessment Bulletins

    June 26, 2019 -- DHS S&T will be holding a webinar to explain two P25 Compliance Assessment Bulletins (CABs) that are currently available for public review and comment. The first new CAB addresses Testing Rules, and the second CAB is on Baseline Inter-RF Subsystem Interface (ISSI)/Console Subsystem Interface (CSSI) Interoperability Testing Requirements. The webinar will be held on Monday, July 8, 2019, at 2:00 p.m. EDT. We’ll discuss the proposed testing rules, updates to reporting procedures and SDOC/STR templates, and what that means for both equipment manufacturers and end users.

    For more information on past events and announcements, please email

    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 Charter provides an overview of the program, the program’s operating framework, and the roles and responsibilities of the involved parties.
    • 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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