The Department of Defense, specifically the Department of the Air Force, is seeking to procure Session Initiation Protocol (SIP) trunks to replace existing Primary Rate Interface trunks at Altus Air Force Base in Oklahoma. The procurement aims to facilitate commercial local and long-distance calls for the base, with the intent to award the contract to AT&T, the only source capable of providing the necessary fiber optic infrastructure. Interested vendors are required to submit a capability statement by September 27, 2023, at 11:00 AM CST, detailing their technical and cost capabilities, with submissions directed to the primary contacts, Katharine Lewis and Kelsey L. Brightbill, via email. The contract is set to commence on October 1, 2024, and will include a five-year period for the contractor to engineer, furnish, install, and test the required services, ensuring compliance with federal standards and regulations.