Codan Radio P25 Training Guide - Manual (Page 9)

P25 RADIO SYSTEMS | TRAINING GUIDE
Chapter 1: Introduction To P25 Page 1
CHAPTER 1: INTRODUCTION TO P25
This document is written with the intention of supplying the reader with a simple, concise and informative
description of Project 25. The document assumes the reader is familiar with conventional Two-Way
Radio Communications systems. The naming and numbering conventions used in this document
are those used in the TIA documents. Some manufacturers use different naming and numbering
conventions. Project 25 is a standards initiative, to be amended, revised, and added to as the users
identify issues, and as experience is gained.
WHAT IS PROJECT 25?
Project 25 (P25) is a set of standards produced through the joint efforts of the Association of Public Safety
Communications Offi cials International (APCO), the National Association of State Telecommunications
Directors (NASTD), selected Federal Agencies and the National Communications System (NCS), and
standardized under the Telecommunications Industry Association (TIA). P25 is an open architecture,
user driven suite of system standards that defi ne digital radio communications system architectures
capable of serving the needs of Public Safety and Government organizations. The P25 suite of
standards involves digital Land Mobile Radio (LMR) services for local, state/provincial and national
(federal) public safety organizations and agencies. P25 open system standards defi ne the interfaces,
operation and capabilities of any P25 compliant radio system. A P25 radio is any radio that conforms to
the P25 standard in the way it functions or operates. P25 compliant radios can communicate in analog
mode with legacy radios and in either digital or analog mode with other P25 radios. The P25 standard
exists in the public domain, allowing any manufacturer to produce a P25 compatible radio product.