The Department of Defense, through the Naval Air Warfare Center Aircraft Division (NAWCAD), is seeking information on the availability of Commercial off the Shelf (COTS) Voice over Internet Protocol (VoIP) Radio Interface Subsystems. The objective is to identify solutions that enable encrypted communication between land-based operators, aircraft, and remote radios while modernizing existing technology and minimizing Space, Weight, and Power (SWaP) requirements. This Request for Information (RFI) is intended for planning purposes only and does not constitute a solicitation for proposals; however, interested parties are encouraged to submit their capabilities and relevant product information by April 15, 2025, to Lauren Clemmens at lauren.a.clemmens.civ@us.navy.mil.