U.S. flag

An official website of the United States government

Government Website

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Safely connect using HTTPS

Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

  1. Home
  2. About DHS
  3. Site Links
  4. Keywords
  5. P25 CAP

P25 CAP

Last Updated: | Publication

Testing Requirements

This document defines various aspects of P25 CAP, including new Participating Equipment Manufacturer Requirements to maintain equipment on the Approved (Grant-Eligible) Equipment list.

Last Updated: | Publication

P25 ISSI/CSSI Conformance Test Tool Validation CAB

The purpose of this document is to clearly convey the procedures, requirements, and guidance used by the Department of Homeland Security Science & Technology (DHS S&T) P25 Compliance Assessment Program (P25 CAP) for approving and recognizing an Inter-subsystem interface/Console sub-system interface (ISSI/CSSI) Conformance Test Tool (ICCTT) for the conduct of the P25 Compliance assessment.

Last Updated: | Publication

P25 CAP ISSI/CSSI Interoperability Test Requirements CAB

This document replaces the previous ISSI/CSSI Interoperability Test Requirements CAB (October 2019) to add a new Appendix B. This CAB lists interoperability test cases for the P25 Console Subsystem Interface (CSSI) and the P25 Inter-RF Subsystem Interface (ISSI).

Last Updated: | Press Releases

News Release: DHS Recognizes DOI Lab to Perform Rigorous P25 CAP Testing

DHS S&T’s partnership with DOI addresses critical need to conduct ISSI and CSSI conformance testing.

Last Updated: | Publication

S&T August 2020 P25 CAP Status Update Webinar

August 2020 P25 CAP Status Update Webinar Agenda & Slides.

Last Updated: | Publication

ST-April 2020 P25 CAP Open Meeting

The P25 Compliance Assessment Program (CAP) held an Open Meeting via webinar for stakeholders on April 1, 2020.

Last Updated: | Site Page

P25 CAP Upcoming Events

Check our events page often for upcoming meetings, conference and panel discussions, and webinars regarding the latest issues in P25 CAP.

Last Updated: | Publication

ST-P25 CAP Program Updates – August 2019

The P25 CAP Program Updates for August 2019 can be downloaded below.

Last Updated: | Publication

S&T P25 CAP Public Comment Tables

P25 CAP provides the public with an opportunity to review and comment on Compliance Assessment Bulletins and reporting templates before they are finalized and published. These tables outline comments that were submitted to DHS S&T, along with a response to each comment.

Last Updated: | Publication

S&T CAB Testing Rules

DHS is opening a public comment period to review the P25 Compliance Assessment Bulletin (CAB) addressing Testing Rules. DHS S&T has issued multiple P25 CAP Common Air Interface (CAI) Testing Requirements CABs that address communication equipment’s performance, conformance and interoperability.