Project 25 Technology Information Group

Monday, January 25, 2021

Project 25 Technology Information Group

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

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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.


Annotation 2020 05 22 085938

Basil “Bill” Pagones


PTIG Members and Friends,

It is with great sadness that I report; Basil “Bill” Pagones of Fort Lauderdale, Florida passed away on Friday May 15, 2020 after a long illness. He was 81 years old. Bill was the former PTIG Executive Director and a friend and colleague to many involved with Project 25.

Basil “Bill” Pagones was a longtime developer and supporter for the Project 25 Standard (P25). This technology standard is used to create Interoperable, Mutual Aid, and Emergency Communications for Public Safety, first responders nationwide. During his long career at Motorola, Bill was responsible for P25 Standards agreements and their application with both Government agency users and other Project 25 manufacturers who developed P25 interoperable communications equipment and services. As an early supporter of the standards and the benefits to both the user and manufacturing community, he was instrumental in the promotion of communications interoperability among the public safety user community and different communications manufacturers. In addition, he supported numerous Federal Government Customers in their development and use of Motorola P25 Communications Systems.

After retiring from Motorola, he served as Executive Director of the Project 25 Technology Interest Group (PTIG). In this role he led the Industry Association and their members in promotion and application of the P25 technology. His work included development of a P25 website, community of interest, whitepapers, and other sources of information about the successful sharing and use of the technology. In addition, he led the PTIG in the development of numerous technical papers and panel presentations at industry conferences and tradeshows. He was responsible for the ground- breaking introduction and multi-vendor interoperability demonstration of the P25 Inter Sub System Interface (ISSI) that offers users the ability to link multiple P25 systems together at the network level. The success of Project 25 and the mission critical capabilities it delivers to our nation’s first responders has been significantly enhanced through the leadership and dedication of Bill Pagones.

Bill was a superb engineer and dedicated his professional life to the improvement of interoperability among public safety communicators. He was a consummate diplomat for the community and dedicated to the goal. He will be missed by all who knew him.

Bill’s Full Obituary can be viewed, and condolences can be posted at the website below:

Project 25 Testing: Products, Services, and Solutions


The Project 25 Technology Interest Group (PTIG) is proud to provide a comprehensive overview of the Project 25 testing products and services available from PTIG members. Thanks to Cheryl Giggetts and Jeremiah Knowles of CTA Consulting, the authors of this new whitepaper.

We have witnessed over 25 years of Project 25 Standards Evolution and P25 Product Technology Improvements in the 2800+ P25 Systems on the air today. Project 25 Technology is now well established as a primary communications solution for Government Agencies, Public Safety, and Critical Infrastructure.

The Testing of Project 25 Equipment and Networks has advanced along with the evolution of P25. Significant improvements in P25 product and network technology testing are now available to help users in the procurement, application, and maintenance of their P25 Systems.

A full range of P25 testing hardware and software products as well as laboratory services are described in the whitepaper. These resources form a rich fabric of support to help P25 users develop and operate their Mission Critical Communications Systems.

Topics Included in the Whitepaper Include:


  • Definition: What is P25 Compliance?
  • Project 25 Compliance Assessment Program (P25 CAP)
  • P25 Network Interface Test Solutions and Software
  • P25 Test Equipment
  • P25 Diagnostic and Coverage Test Solutions
  • Over-the Air Radio Diagnostics
  • In-Building Coverage Testing
  • Outdoor Coverage Testing
  • P25 Consultant Support for System Testing and Maintenance
  • Conclusion
  • Resources and Contacts

A copy of the complete whitepaper can be down-loaded using the link below.


Project 25 Testing- Products, Services, and Solutions 







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