Project 25 Technology Information Group

Thursday, December 9, 2021

Project 25 Technology Information Group

P25 Latest New Products and Services for 2020


The Project 25 Technology Interest Group (PTIG) is pleased to offer a presentation of the latest P25 New Products and Services for 2020  from PTIG Members.


Find out What's New, How it will improve P25 Interoperability and How it will benefit Public Safety and other P25 Users Groups. 


Categories Include:

  • P25 Mobile and Portable Radios
  • P25 Repeaters and Aircraft Radios
  • P25 Consoles
  • P25 System Capabilities, Elements, and Antennas
  • P25 Testing and System Support Services
  • P25 Vocoder Software.

The Slides Include:

  • What is new about the Product or Service
  • How it improves Interoperabiloity
  • What are the benefits to Public Safety 

The full presentation can be downloaded using the link below


P25 New Products and Services for 2020

P25 Education and Outreach Update from IWCE 2020


Jim Downes of the DHS Cybersecurity and Infrastructure Security Agency (CISA) and Chairman of the Project 25 Steering Committee presented an update of Priorities, Best Practices, and Primers from the P25 Steering Committee and the Federal Partnership for Interoperable Communications(FPIC) at the recent Virtual IWCE Conference.


The P25 Steering Committee Priorities:


  • Improve Inter-RF Subsystem Interface (ISSI) and Console Subsystem Interface (CSSI) interoperability
  • Improve key management facility and key fill device interoperability capabilities
  • Address encryption and key management vulnerabilities
  • Increase P25 user input to the standards process
  • Energize P25 education and outreach program
  • Expand P25 test procedures
  • Support P25 Land Mobile Radio/Long-Term Evolution interworking activities

A variety of Updated and New P25 Documents to support Improved Interoperability and Best Practices for the Application of P25 Technology are included in the full presentation.

A copy of the full presentation can be downloaded using the link below.


P25 Steering Committee and FPIC Education and Outreach IWCE 2020.pdf


The Project 25 Technology Interest Group is pleased to welcome STI-CO Antenna Solutions as a new PTIG corporate member.


STI-CO® Antenna Solutions Company Profile

STI-CO specializes in designing and manufacturing antenna systems to mission critical customer specifications. Their custom, high performance antenna systems combine over 50 years of expertise with the latest in technology. STI-CO’s antenna systems keep teams safe and securely connected. They proudly serve users in law enforcement, military, homeland security, heavy freight, passenger rail and transportation markets.

STI-CO® P25 Product Solutions

STI-CO® provides a complete line of antenna solutions from initial product conception to custom manufacturing for Project 25 system applications as well as covert, military, transit, and rail systems. Designed for performance and reliability, STI-CO antenna systems will meet specific user needs for voice, data, and video transmissions.

Communication is a core requirement to connect both people and systems.. STI-CO® is a technology leader in the market providing:

  • • Antenna design optimization for multiple RF co-location challenges
  • • Extensive field experience trouble shooting and verification
  • • Systems that adapt to the latest technologies


STI-CO® Primary Contact:

Name: Kyle Swiat, President and CEO 

E-mail This email address is being protected from spambots. You need JavaScript enabled to view it.

Phone: 866-307-8426 Ext 311

Company WEB site:


For Additional Information contact:

Stephen A. Nichols

Director, Project 25 Technology interest Group

This email address is being protected from spambots. You need JavaScript enabled to view it.

Best Practices for Planning and Implementation of P25 Inter-RF Subsystem Interface (ISSI) and Console Subsystem Interface (CSSI): Volume II July 2020

Federal Partnership for Interoperable Communications and the SAFECOM/National Council of Statewide Interoperability Coordinators have just published a new Best Practices Volume II for ISSI/CSSI Interoperability. This is a follow-on document to the previously published ISSI/CSSI Primer and the ISSI/CSSI Best Practices Volume I documents.

Links to the documents are available on the Safecom and PTIG Websites below:

ISSI/CSSI Best Practices for Planning and Implementation Vol II July 2020

Executive Summary:

Project 25’s (P25) accredited technical standards define features, functions, and the interfaces of P25-compliant radio systems. Two of these interfaces, the ISSI and CSSI, are designed to enhance the operability and interoperability of new and existing land mobile radio systems. ISSI technology permits multiple radio core systems or Radio Frequency (RF) subsystems to be connected and form larger wide-area networks, supporting the “system-of-systems” concept. The CSSI interface can provide interoperability among multiple dispatch console manufacturers’ and system infrastructure manufacturers’ console product offerings, which enables public safety agencies to implement third party P25 console systems.

Given increased interest in both ISSI and CSSI technology, the Federal Partnership for Interoperable Communications, supported by the Cybersecurity and Infrastructure Security Agency (CISA), established the ISSI/CSSI Working Group (comprised of users and manufacturers) and the Focus Group (users only) to explore the ISSI/CSSI technology environment. Among other topics, the Working Group and Focus Group continue to explore connecting single and multiple manufacturers’ ISSI or CSSI technology offerings; collect user and manufacturer implementation procedures and troubleshooting methods; and identify best practices and commonly identified implementation and operational challenges in an ISSI and/or CSSI environment.

This new Volume II document outlines additional categories for practitioners to consider when planning for and implementing ISSI or CSSI technologies. The high-level categories are rooted in best practices observed during all project phases by local, county, regional, and state agencies implementing ISSI/CSSI and are provided as a resource for others in the community who may be contemplating or proceeding with ISSI/CSSI implementation.

The six categories from both Volume I and the New Volume II are listed below:

Volume I

  • Pre-Planning – This category can include a nearly endless set of questions and topics to consider before planning and implementing an ISSI or CSSI, including articulating the underlying purpose, identifying potential partners, setting expectations, conducting a cost-benefit analysis, and pursuing education or training to sufficiently understand the technologies.
  • Partnerships and Governance – Governance is one of the critical success elements that must be addressed to achieve and maintain a sophisticated interoperability solution. This category includes establishing trusted relationships, expressing a desire to interoperate, solidifying partnerships, and establishing formal governance structures via documentation that addresses everything from roles and responsibilities to financial and budget considerations.

New Volume II

  • Stakeholders – It is critical to identify the “right” stakeholders to be involved in planning and implementation, including key leadership, radio systems provider personnel, network professionals, manufacturer personnel, consultants, technical experts, and end users.
  • Technology – The selection and implementation of offered technology solutions and associated features and functions presents many potential challenges that user agencies must understand and be prepared to address.
  • Policies – Partnering agencies must establish standard operating procedures and policies to address everything from talkgroup management to fleet mapping and from user protocols to software and hardware version controls.
  • Thinking Ahead – Throughout planning and implementation, agencies must constantly look ahead and plan for various elements, including continuing active coordination of operations and maintenance, future upgrades, and new or revised feature implementations
PTIG publishes P25 Steering Committee Approved Notes from Charlotte NC TIA TR-8 P25 Standards Meetings. 
The full approved Meeting notes can be downloaded using the link below.
This report provides information gathered from the meetings of the following groups held in Charlotte, North Carolina, on October 8-10, 2019:
 Telecommunications Industry Association (TIA) Mobile and Personal Private Radio Standards Committee (TR-8) and ten of its subcommittees
 Association of Public Safety Communications Officials (APCO) Project 25 Interface Committee (APIC) and one of its task groups
 Project 25 (P25) User Needs Subcommittee (UNS)
 P25 Steering Committee (P25 SC)
Key events that occurred during this meeting cycle included:
 The P25 Steering Committee approved six proposed standards for publication as Project 25 Standards and included the P25 Suite of Approved Standards.
 The UNS received an update on the Statement of Project 25 User Needs (SPUN). Users and manufacturers will continue discussions to finalize a draft document.





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