From the notice

SDA is seeking to procure 330 CIS Voice over Internet Protocol (VOIP) Phones, model number DTD-8841-07 and 310 CIS Voice over Internet Protocol (VOIP) Phones, model number DTD-8851-02-NS-MR This sole source award will be made pursuant to 10 U.S.C. 3204(a)(1), Only one responsible source and no other supplies or services will satisfy agency requirements. The justification for restricting this acquisition to a non-competitive, direct-to-manufacturer procurement with CIS Secure Computing, Inc. is driven strictly by mandatory national security and Supply Chain Risk Management (SCRM) requirements. The secure communication endpoints and modified secure communications equipment required by the operational command operate within high-assurance, secure communication facilities. While baseline commercial versions of these communication endpoints exist in the open marketplace, the specific configuration required involves specialized hardware modifications certified under National Telecommunications Security Working Group (NTSWG) / Committee on National Security Systems (CNSS) TSG standards. Under binding DoD Instruction (DoDI) 5200.44 (Protection of Mission Critical Functions to Manage Supply Chain Risk), the Air Force must enforce strict supply chain integrity controls.

Read the whole notice and its files on SAM.gov ↗