APCO International

Project 25

Meeting Announcements

P25/TIA-TR8 meetings
February 6-8, 2018
Phoenix, AZ
Meeting agenda now available.

P25 CAP AP face-to-face open meeting
During IWCE 2018 in Orlando, Florida
Tuesday, March 6 | 2:30 – 5 p.m.
Orange County Convention Center, North Hall, Room N320CD

As public safety organizations and government agencies evaluate their mission critical Land Mobile Radio (LMR) system needs, many practitioners and operators reach similar conclusions:

  • Radio spectrum is very congested
  • Systems require voice and data functionality
  • Voice quality is essential over the entire coverage areas
  • Secure communication is a necessity
  • Equipment interoperability based on the ANSI/TIA Standard process is a requirement
  • Users are primarily public safety and very often include public service
  • Independent assessment of equipment compliance to the ANSI/TIA Standard is needed
  • Multi-manufacturer equipment interoperability is critical for marketplace competition

Upgrading a LMR communications network is a major undertaking in terms of time, energy, and expense. There are a number of standardized digital technology solutions available. They offer the potential to address many or all major concerns for public safety and they can provide a true platform for the future. However, the decision to "go digital" is only the first step. The different digital solutions are similar but all do not offer the same feature sets nor coverage solutions. This can make the selection difficult. Each one has its own set of features that may or may not suit the needs of public safety organizations and agencies.

The Association of Public-Safety Communications Officials International, Inc. (APCO International) is committed to continued support of Project 25 (P25), a long­standing partnership between the public safety communications community, standard development organizations and industry manufacturers. Each group’s end goal is to satisfy the complex and evolving mission critical communication needs of users for interoperable LMR equipment and systems.

To accomplish the primary goal of having interoperable LMR equipment, users and manufacturers participating in the P25 process develop voluntary, consensus communications standards under the auspices of American National Standards Institute (ANSI)­accredited Telecommunications Industry Association (TIA). The P25 process (1) focuses on the practical realization of the significant benefits inherent to digital radio communications technologies and (2) promotes the competitive offering of compliant P25 equipment and systems for effective use by a highly diverse user community on a worldwide basis. Project 25 is unique in that it is an open, user driven standardization process, with technical and operational requirements established through the participation of its stakeholders, including public safety practitioners from different countries representing different levels of government. The standards published by TIA establish the basis upon which:
  • Manufacturers develop, implement, and competitively offer P25 equipment and systems
  • Accredited laboratories conduct P25 compliance testing
  • Users specify, procure, and operate P25 radios and communications infrastructure

With all stakeholders working together within Project 25, public safety organizations and agencies can realize the opportunity to advance technology along a common path that benefits the greatest number of users.

Project 25 defines system interfaces that are utilized to build P25 communications networks. TIA-102 Standards documents define the messages and procedures required for P25 features to operate across the P25 system interfaces. Project 25 does not define equipment, just the messages and procedures across the P25 Interfaces.

P25/TIA-102 system interfaces support multiple air interfaces and wireline interfaces. The table below provides a view of the wireline interfaces that can be used to support the three different air interfaces.

 

P25 Air Interfaces

P25 Wireline Interfaces

FDMA Conventional

FDMA

Trunked

2-Slot TDMA Trunked

Fixed Station Interface

X

 

 

Inter Sub-System Interface

 

X

X

Console Sub-System Interface

 

X

X

Telephone Interconnect Interface

X

X

X

Data Network Interface

X

X

X

Mobile Data Peripheral Interface

X

X

X

Key Fill Device Interface

X

X

X

Inter Key Management Facility Interface

X

X

X

Network Management Interface

No standard development


NEXT: P25 Organizational Overview 

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