Project 25 Technology Information Group

Wednesday, September 18, 2019

Project 25 Technology Information Group

Project 25 Technology Interest Group (PTIG) Elects a New Board of Directors and Officers.

The Project 25 Technology Interest Group (PTIG) held it’s Annual Meeting in conjunction with the APCO International Conference in Denver on August 13th.  At that meeting, a Board of Directors and Officers were elected. 


Del Smith stepped down as Chairman.  He will remain on the Board.  Del was recognized for his many years of leadership, support, and service.  Cindy Cast from Miami Dade County was elected as the new PTIG Chairman.  Cindy Cast serves as the Radio Systems Manager in the Information Technology Service Department, Radio Communication Services Division of Miami-Dade County, She is responsible for the management, maintenance, repair, and uninterrupted operation of the 800 MHz/700 MHz P25 trunked simulcast radio systems.  The 800 MHz Radio system has over 30,000 radio users.  Ms. Cast holds a Bachelor’s Degree in Management Information Systems (MIS) from Barry University and a Masters Certificate in Project Management from Florida International University (FIU).


With respect to the other PTIG Officers: Jim Holthaus from BK Technologies remains as Vice Chair, Jim is also deeply involved in the P25 standards process as TIA Private Radio Section and TIA TR8.25 chair.  Chris Lougee from 5x9 Communications remains as treasurer. Chris was formerly a VP at ICOM and the TIA PRS chairman before forming his new consulting group.  Andy Davis from Motorola Solutions remains as Secretary.  Andy is also a leader in the P25 Standards development process as the current TIA TR-8 Chairman.


Departing the PTIG Board were Jim Junkins, Roy McClellan, and Sanjay Patel.  Thanks and recognition were extended to them for all for their service.  New on the Board are Chris Maiers, SWIC from the State of Iowa, Karthik Rangarajan from EF Johnson, and Dominick Arcuri from DVA Consulting. 


Other P25 radio Users and practitioners returning to the PTIG Board include: Del Smith- Alaska ALMR, Christie Bielby-Texas DPS; Brent Finster-University of Hawaii, Scott Wright-State of Connecticut, Brad Stoddard-State of Michigan; Brandon Diemer-BLM NIFC, Eric Davies- DHS; Karl Larson-City of Portland; John Richards-State of Maine; George Crouch-State of South Carolina and Vice Chair Project 25 Steering Committee; Eric Linsley-Mobile County Alabama.  


PTIG Board returning Commercial Members include: Andy Davis-Motorola Solutions, Chris Lougee 5 x 9 Communications; Jim Holthaus BK Technologies, Cheryl Giggetts-AECOM; Neil Horden-Federal Engineering; Doug Chapman-Etherstack; Robin Grier-Catalyst, Todd Perdieu-Harris.


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


TIA TR-8 Update Summary from the TIA meetings Chicago June 2017

Andy Davis, Chairman TIA TR-8

This document highlights TR-8 accomplishments and work in progress for 2017. The document will be updated after every TR-8 face to face meeting occurring in 2017. The filename reflects the date of the latest update. After the first 2017 version, each update will use blue font to indicate the updates.

Link to the P25 TIA TR-8 Standards Update June 2017 Chicago


The Project 25 Technology Interest has published two PPT presentations from PTIG's panels at IWCE 2017.  

Links to the documents are below:


P25 Foundations Presentation IWCE 2017

P25 User Experience Presentation IWCE 2017


A summary of the panel information and speaker list with topics is below.

P25 Foundations Panel

Steve Nichols PTIG: 

P25 Resources


Dom Arcuri, DVA

P25 Basics, Interfaces and Terminology


Jim Holthaus, RELM

Conventional System Configurations, Interoperability and best practices      


Karthik Rangarajan, EFJI

Trunking System Configurations, Interoperability, and best practices




Todd Perdieu, HARRIS

ISSI CSSI Roaming Multi system deployment best practices, LMR-LTE interoperability


Andy Davis, MOTOROLA

P25 Roaming and IDduplication, P25 Standards Update, P25 Future work in progress including Benefits to users, P25 Encryption status.  TIA lead-in to CAP


Sridhar Kowdley, DHS  OIC             

 P25 CAP testing update.


Cheryl Giggetts, AECOMM

Using the P25 Standards and Capabilities Guide to develop an RFP


Chris Lougee, 5x9

P25 Market and FAQs


Open Q&A session



P25 User Experience Panel

Del Smith, (Moderator)


Alaska ALMR

Stephen Nichols

P25 Resources available from PTIG

Project 25 Technology Interest Group

Jim Downes,


Chuck Brotherton,

Austin TX GATTRS system

Tom Bretthaur,

Richard Schmahl

Ohio MARCs

Scott Wright,

State of Connecticut



Jim Downes:

Federal Agencies, FPIC

Ernie Blair

Huntsville-Madison County AL 

Kevin Jenkins

Calhoun County AL

Open Q & A Session


The Project 25 Technology Interest Group is pleased to welcome

Leonardo Critical Communications (formerly Selex)

as a returning PTIG corporate member.


In 2017, the land mobile radio unit of Selex ES Inc. was rebranded as Leonardo Critical Communications.  They continue their legacy as a global manufacturer and provider of complete LMR solutions.  Leonardo provides LMR systems to critical agencies such as emergency services, law enforcement, utility, transportation, oil & gas, as well as professional enterprises.  

Leonardo radios have been in their DNA for over 60 years resulting in LMR solutions that are created with simplicity, reliability and flexibility even in the most challenging environments. Their systems are customizable to meet specific user requirements.

Leonardo’s primary LMR systems include: P25, TETRA, DMR

Leonardo has deployed their DMR, TETRA and P25 systems in over 50 countries around the globe, including the United States, Canada and Mexico.

Their Overland Park, Kansas facility is staffed with engineers and technical experts to support the Americas LMR business.  They have full system integration capabilities as well as stocking of finished goods, spare parts and renewal parts.  In addition, their customer support help line is staffed with LMR experts in Kansas.

Business Development Contacts for PTIG Website inquiries

Nate Maloney

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

Bill Fredrickson

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Mailing Address:

Leonardo Critical Communications

11300 W. 89th Street 

Overland Park, KS 66214

Company website:


Why Utilities Deploy P25


The P25 digital standard, originally designed for public safety, is making inroads with North American utilities.

By David Deacon

April-May 2017 Mission Critical Communications •


Use the link below to access the full article:


Excerpt from the Mission Critical April May Utilities article:

“Many electric utilities are integrating P25-compliant technology into their radio systems. P25, a mature digital radio standard in use for 25 years, has not remained static. As the session initiation protocol (SIP) and real-time transport protocol (RTP) world of IP signaling evolved, P25 followed suit with the introduction of the Inter RF Subsystem Interface (ISSI), a network-tonetwork interface, and the Console Subsystem Interface (CSSI), a standard interface for connecting thirdparty consoles to the radio network. These interfaces offer customer choice and competition among multiple P25 suppliers.

After 25 years of evolution, P25’s array of supplementary services and features is extensive. P25 is flexible and versatile, allowing manufacturers to add features such as man-down emergency call, transmit-and-receive cycling and request-to-talk (RTT) callback, a feature commonly used in the utility industry.  While RTT is not defined within the P25 standard, both the CSSI and Common Air Interface (CAI) are flexible enough to introduce the signaling required to support it in both the consoles and radio terminals.”

David Deacon is founder and CEO of Etherstack. During the past 20 years, Etherstack has developed and licensed LMR technologies in Project 25 (P25), TETRA, Digital Mobile Radio (DMR) and NXDN to manufacturers around the world





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