Project 25 Technology Information Group


Tuesday, June 18, 2019

Project 25 Technology Information Group

The Project 25 Technology Interest Group (PTIG) is pleased to publish a new Best Practices for Planning and Implementation of P25 Inter-RF Subsystem Interface (ISSI) and Console Subsystem Interface (CSSI): Volume I. This document is a result of an extensive collaborative effort of the Federal Partnership for Interoperable Communications (FPIC) ISSI/CSSI Focus Group supported by supported by the Department of Homeland Security Cybersecurity and Infrastructure Security Agency Emergency Communications Division.

 

Executive Summary

Project 25’s (P25) open standards define features and functions and the interfaces of P25-compliant radio systems. Two of these interfaces, the Inter-RF Subsystem Interface (ISSI) and the Console Subsystem Interface (CSSI), are designed to enhance the operability and interoperability of new or existing land mobile radio systems.

ISSI technology allows for multiple radio core systems or RF subsystems to link together and form larger wide-area networks, supporting the “system-of-systems” concept. The CSSI interface provides interoperability among multiple dispatch console vendors and system infrastructure manufacturers, which enables third party P25 console options.

Given increased interest in both ISSI and CSSI technology, the Federal Partnership for Interoperable Communications, supported by the Department of Homeland Security Cybersecurity and Infrastructure Security Agency Emergency Communications Division, established the ISSI/CSSI User Working Group (comprised of users and manufacturers) and the Focus Group (users only) to explore the ISSI/CSSI technology environment including but not limited to, successfully connecting single and multiple manufacturer ISSI or CSSI systems, collecting user and manufacturer implementation procedures, troubleshooting methods, and identifying best practices.

This document’s purpose is to outline components for practitioners to consider when planning for and implementing an ISSI or CSSI implementation. The high-level components are rooted in best practices observed during all project phases by local, county, regional, and state agencies implementing ISSI/CSSI and are provided as a resource for others in the community who may be contemplating or implementing ISSI/CSSI. The six components are listed below; the first two are addressed in this volume while the other four will be addressed in a future volume.

  • Pre-Planning
  • Partnerships and Governance
  • Stakeholders
  • Technology
  • Policies
  • Thinking Ahead

The Full document can be downloaded using the link Below:

P25 ISSI/CSSI Best Practices Guide

It can also be accessed using the DHS Werbsite link below:

https://www.dhs.gov/publication/p25

 

 


 

 

 

 

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