Specifying your P25 System

Introduction

By | November 15, 2013

Is P25 the right technology? How do I specify my coverage requirements? What do I need to know about ISSI? How can I ensure interoperability? What about FirstNet?This Best Practice Guide for specifying P25 systems uses a simplified...Read more

Overview

By | January 24, 2014

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Evaluate available technologies

By | January 23, 2014

With a good understanding of your status quo and the future needs of your system’s users, it is time to determine which technology might best fit for project. While this guide is written chiefly for Public Safety buyers of P25 systems, in some...Read more

Advantages of P25

By | January 23, 2014

Proven in mission-critical use: for nearly two decades Proven interoperability: with P25 compliance Assessment Program (P25 CAP) Multi-vendor ecosystems: ensure competitive pricing Scalable: to suit agency (conventional and trunked) Backwards...Read more

Perceived shortcomings of P25

By | January 23, 2014

P25 has had its share of criticism, much of which was misplaced, unfair or is no longer valid. For example, some early large systems did not have enough radio sites and the resulting coverage problems – though technology independent –...Read more

Conventional or Trunked P25?

By | January 23, 2014

Deciding on P25 is not the end of the technology selection process: important choices need to be made. Conventional or trunked? Phase 1 or Phase 2? Luckily, in most cases these decisions are not difficult. While you should use an experienced...Read more

Comparing trunked and conventional traffic handling

By | January 23, 2014

The diagram illustrates the traffic-handling properties of trunked and conventional systems. The conventional system has the same capacity per channel regardless the number of channels. For a trunked system, the per-channel capacity grows...Read more

Phase 1 or Phase 2

By | January 23, 2014

A similar argument can be made when deciding whether to implement P25 Phase 1 or Phase 2. The main difference between the two phases is system capacity, so the primary reason for opting for Phase 2 is additional capacity. Phase 2 TDMA (Time...Read more

System Architecture

By | January 23, 2014

Once the basic technology choices have been made (for example, you decided that P25 trunked Phase 1 system will meet your needs) Start with the basics and get them right, it is time to begin to define your system in greater detail. Several high...Read more

Coverage Needs

By | January 23, 2014

Coverage considerations will dictate the number and locations of your radio sites (also referred to as towers). Together with frequency availability and traffic patterns, they will determine whether the system should be simulcast, multicast or a...Read more