Project 25 News

Welcome!

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APCO 2026 logo

Join The Project 25 Technology Interest Group at APCO 2026

• Join us at APCO for our “P25 Questions? Ask the Experts” Panel session featuring an open forum Q & A with leading P25 Experts Monday August 3rd 2:00-3:00 PM Room 221 D

• Join us for “P25 LMR & 4G/5G Cellular: Better Together with Standards Based Interworking” (in partnership with The Radio Club of America) Monday August 3rd 3:30-4:30 PM Room 221 D

• Visit the Project 25 Technology Interest Group Booth (1051). Bring your questions and meet with P25 User agency directors and engineers from our P25 Industry members and consultants.

• See all the new P25 Products and Services from 22 PTIG member Booths on the show floor.

“P25 Questions? Ask the Experts”
Monday August 3rd 2:00-3:00 PM Room 221 D
Speakers:
• Stephen Nichols, Project 25 Technology Interest Group (PTIG)
• Don Root P25 Steering Committee Chair, APCO P25 Manager
• John Lambrou, Motorola Solutions, TIA TR-8 Chair
• Jeremy Elder, L3Harris
• Scott Wright Connecticut Department of Emergency Service and Public Protection, P25 User Needs Working Group (UNWG) Co-Chair, Connecticut Deputy SWIC

This panel offers access to the leaders of Project 25 through an “Open Forum” question and answer session.

Our distinguished panel is able to answer your questions on P25 Technology and interoperability including topics like…

• What is on the roadmap for P25 Standards going forward
• What is the new P25 GPS on PTT standard and how will it benefit my users?
• How secure is P25 and what improvements are coming through the new P25 Link layer Encryption and Link Layer Authentication Standards?
• How can my system be linked to another P25 System that is nearby? What functions do I get?
• Why does vendor “A”s portable not work on vendor ”B’s network?
• How to integrate Consoles from multiple Vendors in my Call Center?
• What techniques are available using P25 to assure Interoperability with supporting agencies that roam into my system for Mutual Aid?
• How can I link my P25 LMR users to LTE cellular PTT users in my region?

P25 LMR & 4G/5G Cellular: Better Together with Standards Based Interworking
Monday August 3rd 3:30 PM – 4:30 PM Room 221 D
• Alan Spindel, President, Radio Club of America
• Stephen Nichols, Project 25 Technology Interest Group (PTIG)
• Scott Wright, Connecticut Department of Emergency Service and Public Protection, P25 User Needs Working Group (UNWG) Co-Chair, Connecticut Deputy SWIC
• John Lambrou, Motorola Solutions, TIA TR-8 Chair
• Jeremy Elder, L3Harris

The Radio Club of America is pleased to host an expert panel exploring interworking between P25 LMR and 4G/5G Cellular Broadband. You do not need to choose one or the other; P25 LMR and Broadband are “Better Together”

First, a P25 State-wide System Administrator's expectations for LMR/Broadband Interworking will be presented. Then, a newly published "Study of Interworking between P25 LMR and 3GPP (MCPTT) Mission Critical Services" report from TIA TR-8 (responsible for P25 Standards) and The Alliance for Telecommunications Industry Solutions (ATIS) will be shared. This report includes scenarios and considerations for the use of a 3GPP Interworking Function (IWF) to enable interoperability of common standard services between LMR and 4G/5G Cellular. Multiple LMR systems are examined: P25 Trunking, Conventional, and TIA-603 analog Conventional FM. Also included are P25 features that do not have analogous 3GPP features and may not be expected to interoperate:

To conclude, concept definitions on the best use of P25 Standards based Interfaces to interoperate with the diverse set of Cellular networks and products will be shared. The Interfaces include the P25 Inter Sub-System Interface/Console Sub-system Interface (ISSI/CSSI), and the P25 Digital Fixed Station Interface (DFSI) The concepts show what a First Responder agency could do to extend their P25 System for Broadband Cellular Interworking.

Visit the Project 25 Technology Interest Group Booth (1051). Bring your questions and meet with P25 user agency directors and engineers from our P25 Industry members and consultants.

APCO 2023 Booth SN CG IMG 3643

See all the new P25 Products and Services from 22 PTIG Members on the show floor.

APCO 2026 Exhibitors

Details: 22 July 2026

The Project 25 Technology Interest Group Welcomes Our Newest Corporate Member: Crown Castle

Crown Castle Masterbrand Logo RGB

PTIG is pleased to welcome Kayla Zuniga, Stephanie Birmingham, Brendan Walsh and the Crown Castle Team our organization.

Crown castle 1

Crown castle 2

Crown castle 3

Details: 07 July 2026

A new P25 101 Basics PPT: “What Standard Interfaces do P25 systems have?” has been developed by Timothy Tacker, Associate Director Engineering Architecture at New South Wales (NSW) Telco Authority.

NSW

PTIG is publishing it on the PTIG website as a companion document for the “What standard services can P25 systems offer?” and the PTIG P25 Capabilities Guide.

This resource is available to PTIG members under copyright and with proper attribution to NSW telco authority.

The full presentation can be downloaded using the link below:

https://www.project25.org/images/stories/ptig/Standard%20TIA-102%20Interfaces%20P25%20Systems%20Have.pdf

PTIG is publishing it on the PTIG website as a companion document for the “What standard services can P25 systems offer?” and the PTIG P25 Capabilities Guide.

What Standard Interfaces do P25 systems have?

P25 Interfaces Covered

Common Air Interface (CAI)
Mobile Data Peripheral Interface
Inter-RF Subsystem Interface (ISSI)
Telephone Interconnect Interface
Console Subsystem Interface (CSSI)
Fixed Station Subsystem Interface (FSSI)P25 Interface Definitions (CAI, ISSI etc.)

Typical slide example

Rights for Use of the Presentation

NSW Telco Authority owns the copyright for this presentation; however, per the notice on the final slide, NSW Telco Authority has also made this material available under the terms of a Creative Commons Attribution 4.0 International (CC BY 4.0) license. In general, this means you’re free to:
Copy and redistribute the material in any medium or format for any purpose, even commercially.
Remix, transform, and build upon the material for any purpose, even commercially.
NSW Telco Authority cannot revoke these freedoms as long as you follow the license terms. Please note that these terms include:
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.

•You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.

Details: 29 June 2026

The Project 25 Technology Interest Group is pleased to publish a new report on P25 Public Safety Networks in Australia. The report was developed by Ranmal Kariyawasam, a leading P25 Subject Matter Expert in Australia.

Ranmal Kariyawasam

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

The full report can be downloaded using the link below:

https://www.project25.org/images/stories/ptig/Case_Studies/Australian%20Public%20Safety%20Networks%20v1.0.pdf

The report presents a strategic evaluation of Mission-Critical Communications in Victoria, New

South Wales, South Australia, Queensland, and Tasmania.

The report includes an overview and scale and architecture and capabilities for each system.

Details: 29 June 2026

The Project 25 Technology Interest Group is pleased to share a link to recent guidance from DHS CISA on risk mitigation to aid in post-quantum cryptography (PQC) adoption.

Product Categories for Technologies That Use Post-Quantum Cryptography Standards

A link to the full report is below:

https://www.cisa.gov/resources-tools/resources/product-categories-technologies-use-post-quantum-cryptography-standards

Excerpt from report Introduction

“In response to the June 6, 2025, Executive Order (EO) 14306, “Sustaining Select Efforts to Strengthen the Nation’s Cybersecurity and Amending Executive Order 13694 and Executive Order 14144,” the Cybersecurity and Infrastructure Security Agency (CISA) is providing and regularly updating lists to aid in post-quantum cryptography (PQC) adoption. The lists include hardware and software categories with example types of widely available products that use PQC standards to protect sensitive information.1 The lists focus on categories of available products, typically acquired by the federal government, that utilize cryptographic algorithms. Because PQC-capable products are widely available in the listed categories, organizations should acquire only PQC-capable products when planning acquisitions and procuring products in these categories”.