The Inter-RF Subsystem Interface (ISSI) and Console Subsystem Interface (CSSI) provides the ability to interconnect Project 25 radio frequency subsystems and console subsystems, even when systems are supported by different manufacturers. Given the inherent complexities in interconnecting radio frequency subsystems and navigating the implementation of standards-based technology, the Federal Partnership for Interoperable Communications (FPIC), with support from the Department of Homeland Security Cybersecurity and Infrastructure Security Agency, developed the Project 25 Inter-RF Subsystem Interface (ISSI) and Console Subsystem Interface (CSSI) Primer.
The Primer provides a high-level overview of a broad range of introductory topic areas relevant to ISSI and CSSI, including:
- Overview of ISSI/CSSI technology,
- Benefits of ISSI/CSSI,
- How Project 25 standards address ISSI/CSSI,
- ISSI/CSSI planning and implementation challenges,
- Resources for effective ISSI/CSSI implementation, and
- Current FPIC ISSI/CSSI Focus Group activities (Primer Appendix).
The Primer was developed by the FPIC ISSI/CSSI Focus Group, which serves as a resource for current and prospective ISSI/CSSI users as they plan and implement these interoperability solutions. The Primer was approved by SAFECOM and National Council of Statewide Interoperability Coordinators in December 2018. The Primer is available for download at https://www.dhs.gov/technology.
For additional information on the Primer, the ISSI/CSSI Focus Group, and other matters related to interoperability solutions, please contact FPIC at FPIC@hq.dhs.gov.