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.

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.

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.

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”. 

Ryan Phillips, Technology Manager, Mindshare announces their recent completion of Non-CAP CSSI testing between the Mindshare console and the Motorola ASTRO P25 radio system.

Full test Report: https://www.project25.org/index.php/compliance-assessment/p25-non-cap-issi-cssi-interoperability-testing

Testing Configuration Information:

"Mindshare Software P25 CSSI Gateway: v1.1.0 Console Suite: v3.42.0"

"Motorola Software ISGW – Astro: 20.24.01.02-80"

"Testing dates: February – April 2026"

Mindshare lab connected to Motorola lab via VPN The Mindshare Console Subsystem (CSS) was configured as the “Serving” subsystem for all talkgroups used in the testing and consisted of console equipment only.

The Motorola RF Subsystem (RFSS) was configured as the “Home” subsystem for all talkgroups used in the testing.