P25 CAP Releases Updated ISSI/CSSI Conformance Testing Documents
Wednesday, January 06, 2021 | Comments

The Project 25 Compliance Assessment Program (CAP) released several updated P25 CAP documents related to Inter-RF Subsystem Interface (ISSI) and Console Subsystem Interface (CSSI) conformance testing.

The Department of Homeland Security (DHS) Science and Technology Directorate (S&T) and its partners have been developing P25 CAP procedures for verification of commercial test tool products that are designed to perform conformance testing of the ISSI and CSSI equipment in accordance with relevant P25 CAP Compliance Assessment Bulletins (CABs).

Those efforts necessitated updates a variety of related documents. In December, the DHS S&T successfully finalized various documents.

The “ISSI/CSSI Conformance Testing Requirements CAB” replaces the currently posted “Baseline Inter-Radio Frequency Subsystem Interface (ISSI) and Console Subsystem Interface (CSSI) Conformance Testing Requirements CAB.” The CAB validates the protocol and messages that are exchanged across a P25 wireline interface.

The “ICC Test Tool Verification CAB & DHS Consolidated Comment-Resolution Matrix” builds on the previously developed “P25 CAP ISSI/CSSI Conformance Test Tool Verification Process — Interim Guidance Document v6.0.” The newly finalized CAB outlines P25 CAP procedures for verification of commercial test tool products that are designed to perform conformance testing of P25 ISSI and CSSI equipment. The ICC Test Tool Verification CAB was finalized after a 30-day public comment period. The “DHS Consolidated Comment-Resolution Matrix” details all comments received as well as resolution details for each.

The CAP program also updated the following related documents:
• “ISSI/CSSI Conformance Pass/Fail Criteria”
• “ISSI-RFSS Conformance Test Case”
• “CSSI-RFSS Conformance Test Case”
• “CSSI-CSS Conformance Test Case”

The documents will soon be posted on the P25 CAP program’s website, which can be found here, and are available upon request from P25CAP@hq.dhs.gov.

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