Project 25 Technology Information Group

Tuesday, July 23, 2019

Project 25 Technology Information Group

8 P25 PTIG Members Participate in Month-Long CAP Interoperability Event

Mission Critical Magazine published the announcement on May 1st in their "Weekly Transmission News"

A link to the full article is below:


Summary taken from the Mission Critical Article:

"Motorola contracted the CAP-recognized personnel from Compliance Testing to perform tests in its Motorola Schaumburg labs April 30 – June 1 and to create the detailed test reports (DTRs) that all participants will use to create their respective CAP documents, said Andy Davis, Motorola’s P25 standards manager."

"Motorola, JVCKENWOOD, Harris, EF Johnson, BK Technologies, Tait, Icom America and GME are confirmed to participate. Testing at the event includes P25 Phase 2 requirements and standards for the Common Air Interface (CAI), and the participants will test FDMA, TDMA and inter-wide-area communications network (WACN) functionality."

Project 25 Statewide Communications Systems.         4-18-18            

There are 37 States with State-wide P25 Systems and 13 States either building toward a P25 State-wide system or with no State-wide system.  If you have updates or corrections to this list, please reply to 

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P25 Statewide Systems (37)

Alabama 1st Responders

Phase 2 700/800

Alaska   ALMR

Phase 1 VHF/700

Arkansas AWIN

Phase 1 700/800

Colorado DTRS

Ph 1 to Ph 2 700/800


Phase 1 700/800

Delaware DPS

Phase 1 800

Hawaii   HIR    

Phase 1 700

Idaho   ICAWIN

Phase 1 700

Illinois STARCOM

Phase 2 700/800

Indiana SAFE-T

Phase 1 800

Iowa   ISICS

Phase 2 700

Kansas KSICS

Phase 1 700/800

Louisiana LWIN

Phase 1 700

Maine MSCS

Phase 1 VHF

Maryland FRIRS

Phase 2 700

Massachusetts CMS

Phase 2  


Michigan MPSCS

Phase 1 700/800

Minnesota ARMER

Phase 1 800

Mississippi MWIN

Phase 2 700/800

Missouri MSWIN

Phase 2


Montana MSIRS

Phase 1 VHF

Nebraska NSRS

Phase 1 VHF

New Hampshire

Phase 1 VHF

New Jersey NJICS

Phase 2 700

North Carolina VIPER

Phase 1 700/800


Phase 2 800

Oklahoma OWIN

Phase 1 800

Oregon SRP

Phase 2 700

Rhode Island SCN

Phase 1 800

South Carolina PALMETTO

Phase 1 700/800

South Dakota SRS

Phase 1 VHF

Tennessee ACN

Phase 2


Virginia STARS

Phase 1 VHF/700

Washington State Police

Phase 2 700

West Virginia SIRN

Phase 1 UHF Lo

Wisconsin WISCOM

Phase 1 VHF/800


Phase 1 VHF/800


States with no single P25 statewide system or a system currently building out to P25.














New Mexico


New York


North Dakota












A copy of the list can be downloaded using the link Below:

P25 State-wide Systems List 



PTIG Publishes Three New Project 25 Panel Presentations for 2018:

P25 Foundations, P25 User Experience, and a P25 Security Update.

The Project 25 Technology Interest Group is now offering a comprehensive P25 Update through the Power Point presentations presented at the recent IWCE conference in Orlando. The Three Power Point presentations cover:

  • P25 Foundations: The latest update to the P25 Standards, and their applications
  • P25 User Experience: A series of new P25 case studies from a diverse group of P25 System administrators and directors.
  • P25 Security Update: The latest on P25 Security including an overview to the new P25 Link Layer Encryption Standard, P25 Authentication and P25 Key Management improvements.

Copies of the presentations can be downloaded from the PTIG Website:

Under the “Documents” Tab on the Home page:

  • PTIG P25 Conference Presentations
  • PTIG P25 System Case Studies

Documents tab Capture


Summaries of the Presentations are below:

P25 Foundations

This PPT delivers information useful to those seeking a deeper understanding and updated awareness of the established P25 standards, the matching equipment capabilities, and the continued evolution of system technologies and interfaces. Completed P25 Standards, recently published updates, and future P25 work priorities are covered. Content includes: A Basic P25 Overview of the P25 Interfaces including: Trunking and Conventional systems Phase 1 and Phase 2 systems, and Wireline interfaces including the systems (ISSI), console (CSSI)and fixed station (FSI). In addition the latest CAP testing Update is included. New topics for 2018 include: Improved Encryption Key Management standards, TDMA Trunking Control Channel, P25 Link Layer Encryption, ISSI and CSSI interoperability, and The P25 Value Proposition. The PPT also includes topics on the use of P25 for Emergency Communications, how to use P25 to develop an RFP, and an update on the P25 Product and Services available in the market.

P25 Foundations Panelists:


  • Stephen Nichols, Director, Project 25 Technology Interest Group
  • Andy Davis, Senior Resource Manager, Motorola Solutions
  • Dominick Arcuri, Televate
  • Jeremy Elder, Systems Product Line Manager, Harris Corporation
  • Jim Holthaus, Vice President - Chief Technology Officer, BK Technologies
  • Mitch Urbanczyk, Sales Engineer, EF Johnson
  • Sridhar Kowdley, Program Manager, DHS Office for Interoperability and Compatibility
  • Cheryl Giggetts, CTA Consulting
  • Chris Lougee, Principal, 5x9 Communications
  • Nick Pennance, ICOM



P25 User Experience:

This PPT offers Project 25 user experiences and P25 system case studies. It is structured as a series of presentations from a diverse user group including Federal, State and Local government systems. Each panel member describes their P25 system, its scope, capabilities, agencies served, development history, interoperability achieved, issues resolved, and lessons learned. Information on Governance structure, and revenue sources are also included. System upgrade plans for some of the P25 systems are described.

P25 User Experience Panelists:


  • Del Smith, Alaska ALMR (Moderator)
  • Cindy Cast, Miami Dade County FL
  • Brad Stoddard, State of Michigan
  • John Richards, State of Maine
  • Scott Wright, State of Connecticut
  • Keith LaPlant, United States Coast Guard
  • Jim Downes, DHS OEC
  • Chief Lorin Mock, Clay County FL
  • James Miller, Hamilton County IN
  • Stephen Nichols, Project 25 Technology Interest Group



P25 Security: New Standards, Applications, Interoperability

This PPT includes: P25 Security Standards updates, enhanced sharing between Key management facilities and devices; and an overview of the new P25 Link Layer Encryption standard. P25 Authentication and AES encryption applications are also detailed. Encryption planning and Best Practices information are included along with links to three FPIC/SAFECOM documents on encryption planning and implementation.

P25 Security Panelists:


  • Jim Holthaus, CTO, BK Technologies
  • Jeremy Elder, Systems Product Line Manager, Harris Corporation
  • Alan Massie, FBI
  • Jim Downes, FPIC



The Project 25 Technology Interest Group (PTIG) offers a single page list summarizing the Top 10 Benefits of Project 25 Communications Technology for Public Safety, Government, and Commercial Users.


Top 10 Benefits of Project 25 (P25) LMR Radio Technology

  1. Public Safety Grade Reliability and Performance
  2. Mature, well defined, P25 Air and Wireline Standardized Interfaces create seamless interoperability to link multiple users, agencies, and systems with local, state-wide, and national coverage, independent of manufacturer.
  3. A Large Installed Base of over 2200 P25 Public Safety, Federal, and Government Systems in the USA (conventional and trunked), offer interoperable roaming and mutual aid beyond jurisdictional boundaries.
  4. Superior security using 256 bit AES for encrypted voice, data, GPS location, and key distribution both over the air (OTAR) and through directly connected key fill devices.
  5. The preferred radio technology for Federal Grant applications
  6. A User-Driven technology that embodies: secure direct mode operation, backward compatibility to legacy analog radios, forward migration to improved spectrum efficiency and cost effective coverage using a variety of P25 system configurations for urban, rural and remote areas using any frequency band or combination of bands (VHF, UHF, 700/800/900 MHz)
  7. A live, active, technology that continues to evolve with new capabilities of wireless and IP network evolution, security upgrades, and test standards.
  8. The reliable, de-facto, choice for mission critical communications during Natural Disasters, Large Sporting and Entertainment events, and Social unrest.
  9. Superior Audio volume and clarity through an advanced P25 vocoder combined with high performance radio designs for specific, high noise, Public Safety environments.
  10. Independent testing for performance and interoperability through labs approved by the Department of Homeland Security CAP program.


A copy of the Document can be downloaded using the link below.

Top 10 Benefits of P25

P25 Standards Update from TIA TR-8 Meetings, Mesa AZ, February 6-8

Andy Davis, TR-8 Chairman

This document highlights TR-8 accomplishments and work in progress for 2018. The document will be updated after every TR-8 face to face meeting occurring in 2018. The filename reflects the date of the latest update. After the first 2018 version, each update will use blue font to indicate the updates.

Completed in 2018:

Air Interfaces

An Addendum to the trunking Control Channel Messages standard was approved for publication

This addendum introduces an "Accessory Sensed Emergency" flag to the emergency alarm message.

Wireline Interfaces
• An addendum to the ISSI Messages and Procedures for Supplementary Data was approved for publication.
This addendum introduces the messages and procedures for Individual Regrouping control across an ISSI/CSSI.





Work in Progress:

Air Interfaces
• A revision to the Conventional Interoperability Test standard is in progress.
This revision corrects editorial errors and makes clarifications on various test procedures but does not add, remove or technically alter tests.
• Creation of a High Signal Strength Intermodulation Rejection Test is in progress.
This test will measure the ability of a P25 or analog conventional FM receiver to reject an unwanted broadband base station signal, thereby preventing degradation to the reception of a desired signal. Performance specifications are expected to follow completion of the measurement method.

Wireline Interfaces
• Group Regrouping for the Trunking ISSI/CSSI Standard is in progress.
This work will enable dispatch equipment connected to Trunking Infrastructures via the ISSI/CSSI to control group regrouping services. Note the control channel messaging for these services has already been standardized.
• A revision of the ISSI Recommended Compliance Assessment Tests bulletin is in progress.
This revision will add recommended interoperability tests for Trunking CSSI applications and add recommended interoperability tests of TDMA operation of the Trunking ISSI and CSSI.
• A new Interoperability test standard for Trunked ISSI Supplementary Data Services is in progress.
This document will provide a standard set of tests for validating interoperability of Supplementary Data Services (Emergency Alarm, Call Alert, etc) operating across a Trunked ISSI.

• Definition of a Link Layer Encryption Security Service is in progress.
This is the first big new technology upgrade for improved Security for all air interfaces of P25. It protects control channel control messages, and hides group and individual IDs.
• An addendum to the Key Fill Interface standard is in progress.
This will enable Key Fill Device (KVL) interface to a KMF, an Authentication Facility and another Key Fill Device

• A revision of the Tier 2 Location Service is in progress.
This revision corrects editorial errors and makes corrections to EXI Encoding examples.

• Definition of 3GPP Mission Critical standard services interworking with TIA Land Mobile Radio standard services is in progress.
This document will describe interworking of features (example; group and individual calls) that are common between 3GPP LTE standards and P25 Trunking, P25 Conventional and Analog Conventional FM LMR standards.


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

P25 Standards Update February 2018






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