This is a sole-source solicitation for a digital phone system, including installation and programming services, to support shipboard operations on a U.S. Navy submarine. The contract will be a firm-fixed-price purchase order set aside for small businesses. Performance of services will take place onboard the submarine, with the contracting office located in Norfolk, VA. No budget amount is specified in the description. All quotes must be submitted by the specified closing time, and questions must be submitted two days prior.