Project 25 Technology Information Group

Wednesday, May 24, 2017

Project 25 Technology Information Group




The Project 25 Technology Interest Group recognizes a significant milestone in the deployment and acceptance for the new P25 Console Sub-System Interface (CSSI). Zetron’s Acom integrated dispatch system products utilizing the TIA Project 25 (P25) CSSI have logged more than 5 million hours of successful operation at customer sites throughout North and South America and Australia. This clearly shows the fast acceptance and continued growth for the relatively new P25 CSSI console interface standard. The Acom product can link both Project 25 Phase 1 and Project 25 Phase 2 systems from a variety of P25 infrastructure manufacturers including:

Motorola (Phase I and II)

Harris (Phase I and II)



EF Johnson


“Exceeding 5 million hours of successful CSSI operation is yet another demonstration of our ongoing commitment to supporting P25 Standards and technology” said Zetron President and CEO, Ellen O’Hara. “It also underscores our continuing dedication to delivering solutions that provide cross-system compatibility and offer a wide range of equipment choices in Project 25 Systems”

Additional information can be found by following the link below:




New P25 Paging Solution to Improve Communications for First Responders in Michigan

By: Brad Stoddard

State of Michigan Department of Technology, Management, and Budget,Lansing MI

A new public safety paging technology solution that will allow emergency personnel across Michigan to use a single system for both two-way radio and paging is now available. The P25 paging capability – the first of its kind – will operate on Michigan’s Public Safety Communications System.

Currently, MPSCS subscribers may need two separate systems to dispatch emergency crews, one for the radios they use at the scene of an incident and another for the pagers that summon emergency responders. This new technology will provide both functions in one single system. Additionally, the new solution will notify first responders if they are out of communication range, a confirmation the current method does not provide.

“In an emergency, every second is critical to life-saving activity,” said Brad Stoddard, MPSCS director. “The efficiency created by combining radio and paging into one system will get emergency responders to an accident scene faster, which will save lives.”

The MPSCS is one of the largest single public safety communications system in North America, providing interoperable voice and data communications to 1,493 local, state, federal, tribal and private public safety agencies. MPSCS has strategically partnered with Unication, a worldwide leader in designing and manufacturing of critical messaging technology, to bring this state of the art P25 paging solution to fruition. “This partnership has allowed us to bring a paging solution, that has been missing from the P25 landscape for many years, first to the citizens of Michigan and then to the global P25 marketplace.” said Kirk Alland, Vice President and General Manager of Unication USA.

The MPSCS has already worked with state, local and private agencies to test the new paging solution.

The MPSCS, a part of the Michigan Department of Technology, Management and Budget, has received both national and international recognition as the standard for large and multiple partner land mobile radio systems. The system spans nearly 60,000 square miles and includes 246 tower sites with more than 60 integrated local and state public safety dispatch centers and a network communications center that serves more than 74,000 radios.

More information about the MPSCS can be found at and more information about Unication and the G4 P25 Voice Pager can be found at


The Project 25 Technology Interest Group publishes a new White Paper on Automatic Roaming in a P25 Radio System. 


The paper was authored by Andy Davis: Chairman TIA TR-8, Senior Resource Manager - Motorola Solutions and Bill Janky:Director System Design - Harris Corporation.   


The term Automatic Roaming is sometimes misunderstood. There are two methods of roaming that are often discussed in P25 and informally referred to as “automatic” and “manual’. Both roaming methods have unique aspects that mainly affect two areas – user experience, and identity management.

From the perspective of the user, “automatic roaming” refers to the radio’s ability to move from the coverage of one RF site to another without user intervention (or often even user knowledge) and the ability of a radio to move from the operational area of one system to the operational area of another system without changing the operating identities (individual and/or group) of the radio.

The User Experience and Identity Management aspects of roaming are described in detail in the full article that can be accessed via the link below:


Automatic Roaming in a P25 Radio System




The Project 25 Technology Interest Group has released an Update on the Project 25 Suite of Standards.  The update is based on activity at the TIA TR-8 Standards Meetings held October 2015 In Austin TX.  The report was prepared by Andy Davis Chairman of the TIA TR-8 Committee.  The next TIA TR-8 P25 Standards Meetings will be held January 26-28, 2016 in San Diego CA.


A link to the report is found below:

P25 Standards Update October 2015

Project 25 Technology Interest Group Releases New P25 System List Including Australia, Canada and UK P25 Systems

The Project 25 Technology Interest Group (PTIG) has released an updated version of their Project 25 Systems list covering all of the known P25 Systems in the USA, US Territories, Australia, Canada, and the UK. The format of the list has been improved to include both P25 Phase 1 and P25 Phase 2 systems on the same list. Now all P25 systems for a state or country can be viewed on a single document.

This new list identifies 592 P25 Phase 1 and 119 P25 Phase 2 systems in the USA for a total of 711 P25 systems in the USA. The new entry for Australia, Canada and the UK includes 36 P25 Phase 1 systems and 8 P25 Phase 2 systems for a total of 42 P25 Systems.  Since the last release, a number of P25 Phase 1 systems have upgraded to P25 Phase 2. In total, 17% of the P25 systems are currently Phase 2. In the USA, the state with the most P25 systems is Texas with 70 systems. Next is California with 51, Florida with 50, Georgia with 42 and rounding out the top 5, is Pennsylvania with 29 P25 systems.

A new column has been added to include the primary user group for the system (Public Safety, DoD, Federal Agency, Federal Prisons, Airport, Hospital, University, Refinery, etc.) The far and away leading P25 system type is Public Safety with 430 systems. Next is DOD with 127 known systems and Federal Agencies with 73 systems. There are 40 Federal Prison P25 systems.

Research continues to add additional International P25 Systems to the data base. Anyone having information to update the list including additions or corrections is urged to contact Steve Nichols director of the Project25 Technology interest Group. This email address is being protected from spambots. You need JavaScript enabled to view it.

The next update is planned for late in the First Quarter of 2016

The list is available using the link below

P25 Systems List November REV 01





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