The reference (or 21997.MP4 ) identifies a specific archival video titled "Radio Internet-Protocol Communications Module (RIC-M)" held by the Department of Homeland Security (DHS) and various national archives. Video Overview
Available through the DHS Media Library and Library and Archives Canada . Radio Internet-Protocol Communications Module (RIC-M) 21997mp4
: It allows for a phased infrastructure upgrade , meaning agencies can replace parts of their system (like consoles) without needing to overhaul their entire existing radio network. The reference (or 21997
: To enable legacy base stations and dispatch consoles from different vendors to work together regardless of bandwidth. 21997mp4
MP4 Video / Sound: SIL (Silent or limited sound in specific archival versions)