Project 25 Technology Information Group

Wednesday, April 21, 2021

Project 25 Technology Information Group

ISSI/CSSI Non-CAP Interoperability Testing Template  January 2019

P25 Manufacturers have been doing lab to lab testing of commonly supported ISSI/CSSI standard feature sets for some time now.

This template describes a method for reporting ISSI and/or CSSI P25 Interoperability testing results outside CAP.

At the time of this template’s publication, there were no ISSI or CSSI testing results available yet from the DHS OIC Compliance Assessment Program (CAP)

The template allows reporting on interoperability of testing equipment from two manufacturers. That testing may have been performed in a single lab, in a lab to lab setting or in an installed customer setting. That testing may have been performed by personnel with or without ISO/IEC 17025 recognition.

The template does not intend to prescribe a list of standard functionality that could or should be tested. The functionality covered by a published report should be determined by the manufacturers completing the report. The PTIG P25 Capabilities Guide may be used as a reference for P25 features and testing methods included in published P25/TIA-102 standard documents.

A copy of the Template can be downloaded using the link below:


ISSI/CSSI Non-CAP Interoperability Testing Template


The PTIG P25 Capabilities Guide

The Project 25 Technology Interest Group presented a P25 Update at the International Association of Chiefs of Police (IACP) Communications and Technology Committee meeting during their recent Conference in Orlando.

Jim Holthaus, the PTIG Vice Chairman, presented the P25 Update.  Jim is also Vice President-Project 25 Solutions at BK Technologies.  Jim is deeply involved in the development of Project 25 Standards and Products is currently chair of the TIA Private Radio Section (PRS), TIA-TR8.25 Compliance Assessment Formulating Group and TIA/APIC Vocoder Task Group.

The Presentation Included updates on the topics listed below:


  • •Project 25 Eco System Today
  • •Project 25 Standards Update And Future Roadmap
  • •New P25 Security Standards and Updates
  • •Link Layer Encryption
  • •Encryption Key Fill Device (KFD) Updates
  • •P25 Authentication
  • •What is P25 Compliance????
  • •PTIG Update and New P25 Resource Documents Available
  • •P25 New Products and Services Trends

The complete PPT presentation can be downloaded using the link below.


PTIG P25 Update for IACP Communications and Technology Committee October 2018

The Department of Homeland Security Office of Emergency Communications (OEC) and the Project 25 (P25) Steering Committee sponsored a P25 Executive Summit in Portland, Oregon, May 16 and 17, 2018. Leaders from P25 public safety user agencies at all levels of government and the P25 vendor community were invited to address P25 Land Mobile Radio (LMR) user concerns. Topics included P25 LMR interoperability successes and challenges and opportunities to collaborate to ensure the future sustainment of critical LMR capabilities.
This two day event included an opportunity for the user community to share concerns and lessons learned, and identify topics on specific agenda items to discuss with manufacturers as the Summit progressed. On the second day, both users and vendors met to address key P25 issues and concerns from both the user and manufacturer perspectives and develop collaborative approaches to effectively address the improving and sustaining LMR capabilities.
The primary goals and objectives of the Summit were to provide participants with a better understanding of how the P25 user community and the vendor community can develop an enhanced dialog outside of marketing pressures to resolve the challenges that face public safety, specifically to:
 Address how disparate systems and manufacturers’ interpretations of the standards can negatively impact interoperability
 Develop a process that will lead to an environment where all P25 compliant equipment, regardless of make or model, are interoperable upon delivery
 Articulate the importance of interoperability and critical activities to improve user-to-user communications and user-to-vendor interactions
 Obtain commitments from participants to support identified actions
The full Executive Sammary Report can be downloaded using the link below:

The Project 25 Technology Interest Group has published the latest comprehensive list of all Project 25 Documents approved by the P25 Steering Committee.  The list was approved  by the Steering Committee at their October 2018 meeting in San Antonio.  A copy of the list can be down loaded using the link below.


P25 Steering Committee Approved List of Project 25 Documents October 2018



The Project 25 Technology Interest Group (PTIG) recently participated in an IWCE WEBINAR titled:

Pick Me! What's the Best PTT Technology for Your Project?”

The PTIG portion of the panel presentation posed and answered the question:

“Why have so many PTT Users chosen Project 25?”


P25 logo2


In Summary:

  • Project 25 offers “Public Safety Grade” Reliability, Voice Quality, Interoperability, and Security for PTT radio services.
  • The 2250 P25 systems and 37 State-wide P25 systems in the USA have been developed through 25 years of Standards evolution and product technology improvements.
  • P25 offers a robust PTT capability set including: Group calls, Individual Calls, Voice, Data, Location, all with optional full AES end to end encryption and authentication. And a robust, high power, direct mode for life saving communication links if the Infrastructure is not available.
  • The P25 standard was originally defined and continues to evolve based on Radio User input and direction.
  • There is broad support for the use of P25 Standards and Technology for Interoperable Communications from: DHS, SAFECOM, NPSTC, DoD, and 40 P25 Commercial Product manufacturers and Service providers.

The full presentation can be downloaded using the link below:


Why Have so many PTT Users Chosen Project 25?







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