Project 25 Technology Information Group

Wednesday, August 22, 2018

Project 25 Technology Information Group

The Project 25 technology Interest Group (PTIG) presenbted two panels as part of IWCEs College of Technology in March.  These presentations are now available for review and download.

P25 Foundations IWCE 2016 Part 1

P25 Foundations IWCE 2016 Part 2

P25 User Experience IWCE 2016


The Abstracts for each panel are listed below 

P25 Foundations

Many P25 stakeholders and users today face daunting challenges for clarity of choices and challenging issues of emerging technologies. The material will emphasize the P25 radio and system capabilities deliverable today, resources available for testing, technical guidance, migration planning, and system integration. Gain insight on the next phases of the P25 Standards development, and what those next steps may yield for harmonizing future capabilities with P25 in your LMR systems.

Completed P25 Standards, recently published updates, and future P25 work priorities will be covered. Content includes: Phase 1 FDMA systems, expanding deployment of Phase 2 TDMA systems, and Wireline interfaces including the ISSI, CSSI, and FSI. These interfaces continue to reinforce multiple vendor compatibility in system to system links, console and fixed station product choices as well as in subscriber/mobile/portable equipment.

A specific section on Project 25 CAP testing will be presented including test procedures and specs and their use by DHS.

Ongoing work on new standards for Project 25 System security and encryption will be presented as well as possibilities for the interface for P25 LMR and LTE data systems.

P25 User Experience

This panel and workshop session will derive content from Project 25 user experiences and system case histories. It is structured as a series of presentations from a diverse user group including Federal, State and Local government Systems. Each panel member will conduct a short prepared PPT briefing describing their P25 system, it's scope, capabilities, agencies served, development, interoperability achieved, issues resolved, and lessons learned.

P25 in Planning and Procurement. Including P25 product testing

-- P25 Experiences during Implementation and Deployments.

-- Interoperability with neighbors and overlapping jurisdictions.

-- Experiences with Multiple Vendors Systems, Equipment, Interfaces.

-- Lessons learned and best practices established for P25 system design, user training, and governance structure

Other Technology Resources beyond Manufacturers and Equipment Suppliers: Consultants, Integrators, Third Parties.

There will be open Q&A time allocated for panel members on each separate segment.

MissionCritical Communications Publishes P25 E-Book


MissionCritical Communications magazine has published a comprehensive update and guide to Project 25 Technology and its applications titled “P25: Advances in Interoperability and the Technology’s Future” The 139 page document includes sections on: P25 History and a Standards Update, Interoperability and Technology, FirstNet and P25, User Deployments, and P25 Around the World.


A number of the reports in the E-book were contributed by PTIG and PTIG members including our Whitepaper “Is P25 Public Safety Grade?” In addition, PTIG members have made the E-book possible by their support as Sponsors. PTIG sponsors include: Harris, Cobham, JVCKenwood, Zetron and Avtec.


You can register to download the complete P25 E-book using the link below:


P25 E-Book Forward: Strides in Interoperability

By Sandra Wendelken


Following Project 25 (P25)’s 25-year anniversary in 2014,

the standard has continued on its journey to enhance


Progress continues with the wireline interfaces, including

the Console Subsystem Interface (CSSI) and the Inter Subsystem

Interface (ISSI). These standards are important to the technology’s

continued evolution. Several push-to-talk (PTT) vendors are using the CSSI

to connect P25 networks with commercial Long Term Evolution (LTE)

technology and extend PTT services to users with smartphones on

commercial networks. This development will be one to watch as the First

Responder Network Authority (FirstNet) gets rolling.


In addition, a study item on a standard for LMR, including P25, and LTE

interworking was submitted to the Third Generation Partnership Project

(3GPP) for consideration in an upcoming release of LTE. The federal Public

Safety Communications Research (PSCR) program is also working to

integrate P25 and LTE in the future.


A new advisory panel (AP) was established in late 2015 to help get the

P25 Compliance Assessment Program (CAP) moving forward again.

Funding from the Department of Homeland Security (DHS) will help ensure

the program continues down the right path. The AP is comprised of P25

users who have a strong desire to maintain the program and the benefits it

has for users.


P25 users must do their part to remain educated about the

latest developments in the technology and to ensure the equipment they buy

adheres to all the standards. Ignorance means a compromised system. If

you don’t have time to do the proper research it’s advised to hire a credible

consultant. Users have made a good first step by downloading this e-book,

which provides all the latest information on the standard, interoperability,

integration with FirstNet and helpful user deployment details. The e-book

offers a wealth of information to ensure P25 procurements run smoothly and

cost effectively.

This Updated FAQ document has 14 new questions and significant changes to P25 testing questions from the recent Compliance Assessment Program (CAP) open meeting. In addition, the document has been reconfigured to categorize the questions by topic making the document easier to use for quick reference.

The first category is now an individual section for a P25 Standards Overview, including a question on how the P25 Standards are created. The second category deals with P25 Compliance testing and has been updated to reflect the latest DHS OIC Web links and document availability. The other categories include information that describes the relationship of P25 to other radio technologies, Interoperability possible through the numerous Project 25 interfaces with real world examples of existing systems, and the Project 25 Security Services available.   

PTIG offers the FAQ tool to Public Safety and government users who need to deliver a simplified, top level, answer to typical P25 questions received from non-technologist personnel including Police Officers, Fire fighters, administrators, procurement contracting officers. Most of the questions have been received by PTIG at various P25 conference panels and trade shows that the group participates in.

The Project 25 Suite of Standards will continue to evolve to meet the needs of users and to incorporate changing technology and regulatory mandates.  Similarly, this document will also evolve over time.  Subsequent versions will add new questions and clarify answers reflecting the latest updates to the P25 Standard.

Copies of the new Project 25 Frequently Asked Questions v1.2 document can be found and downloaded from the link below

P25 FAQs September 2016 v1.3

The Project 25 Technology Interest Group welcomes Compliance Testing LLC as a new Commercial member of PTIG.   Compliance Testing LLC has prepared a report detailing the the P25 Testing Update presented by DHS OIC and the Compliance Assessment Program Advisory Panel at their open meeting held during the APCO 2016 conference in Orlando.   

The introduction to the report by Chris Lougee, Director of New Business Development, Compliance Testing LLC :

"The P25 Compliance Assessment Program (P25 CAP) Advisory Panel (AP) held it’s second in-person meeting on August 17, 2016, in Orlando, FL, during the APCO International Conference. The stated purpose was to implement P25 policies, identify priorities, establish the path forward, increase awareness of the P25 CAP AP and how it can positively impact P25.



The room was “packed” with 57 users, manufacturers, associations, Public Safety agency representatives, other interested parties and Department of Homeland Security (DHS) Science and Technology Directorate (S&T) officials and staff who convened the meeting. The morning session included presentations by Sridhar Kowdley, DHS-S&T Program Manager, and by Fire Chief Gerald Reardon, City of Cambridge Massachusetts Fire Departments, P25CAP AP Chair. In the afternoon a lively and substantive Q&A session involved the P25 CAP panel members, those attending in-person and on the phone and questions submitted prior to the meeting were answered too.


Many thought the P25 CAP was “dead” a couple of years ago. After a transfusion of DHS-S&T leadership, new energy, additional staff, appointment of a well-qualified Advisory Panel and continued strong support from industry, the P25 CAP is out of the “ICU.” Showing strong signs of life now, P25 CAP has definitely moved to “Recovery,” but much work is remaining to get the patient fully back on its feet.

A full copy of the report can be downloaded using the Link below.

CAP AP meeting report on P25 Testing August 2016


The Project 25 Technology Interest Group (PTIG) held it’s Annual Meeting in conjunction with the APCO International Conference in Orlando on August 14th. At that meeting, a Board of Directors and Officers were elected. A number of new Board members were elected from the Public Safety Radio User Community to fill vacancies created as previous members moved on. These include:

Scott Wright

Scott Wright is a Telecommunications Engineer with the Connecticut Department of Emergency Service and Public Protection and has worked for the State for 26 years. In his role with the State, Mr. Wright supports the State trunked and conventional radio systems. He serves on a number of committees, including: P25 User Needs Study Committee (vice chair), State Interoperable Communications Executive Committee (technical committee chair), RPC19 (technical committee chair), the Federal Partnership for Interoperable Communications, and a number of others. Mr. Wright holds a number of public safety certifications and FCC licenses.

Brent Finster

Brent is the Communications Center Manager for the University of Hawai’i Department of Public Safety with 35 years of experience in law enforcement, fire, EMS and public safety communications. Trading one island for another, Brent most recently was the Director of Public Safety Communications for the Cayman Islands Government during the past seven years.  Prior to his Caribbean assignment, he was the telecommunications manager for the Contra Costa County Fire District in the San Francisco Bay Area. Brent originally hails from Colorado where he served as the communications director in Aspen and as a communications supervisor/dispatcher in Boulder.  He has been a deputy sheriff, EMT and fire chief.  Brent has attended Aims Community College (fire science technology), Colorado Mountain College (law enforcement academy) and the University of Colorado School of Journalism. He has been awarded Life and Senior Membership in the Association of Public-safety Communications Officials International (APCO).

Christie Bielby


Christie has worked in Public Safety Communications for almost 30 years.  She is currently responsible for the Administration of the Texas Department of Public Safety’s newly purchased P25 trunked system, subscriber programming templates, and coordination of encryption for The Texas DPS Communication Service and liaison for other state and local agencies.  She has also been involved with the FPIC Security Working Group for the last few years.


Other P25 radio Users and practitioners returning to the PTIG Board include: Del Smith- Alaska ALMR, Brad Stoddard-State of Michigan; Brandon Diemer-BLM NIFC, Eric Davies- DHS; Karl Larson-City of Portland; Jim Junkins-Harrisonburg/Rockingham VA; John Richards-State of Maine; George Crouch-State of South Carolina and Vice Chair Project 25 Steering Committee; Eric Linsley-Mobile County Alabama; and Cindy Cast- Miami Dade County.

The PTIG Board also welcomes a new Commercial member, Todd Perdieu, representing Harris Corporation. PTIG Board returning Commercial Members include: Andy Davis-Motorola Solutions and TIA TR-8 Chair; Chris Lougee 5 x 9 Communications; Jim Holthaus RELM and TIA PRS and TIA TR8.25 chair; Cheryl Giggetts-AECOM; Neil Horden-Federal Engineering; Roy McClellan- Airbus DSC; Doug Chapman-Etherstack; Robin Grier-Catalyst; Sanjay Patel-IDA.

The PTIG Slate of Officers were also nominated and elected at the Annual Meeting. Chairman: Del Smith, Vice Chairman: Jim Holthaus, Treasurer: Chris Lougee, Secretary: Andy Davis.

Stephen Nichols was appointed to continue as Executive Director for the non-profit organization.






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