DEFENSE RED SWITCH NETWORK (DRSN)
The Defense Information System Network (DISN) provides secure voice services using the Joint Staff Defense Red Switch Network (DRSN). This global, secure voice service provides the President, Secretary of Defense, Joint Chiefs of Staff, combatant commanders and selected agencies with command and control secure voice and voice-conferencing capabilities up to the Top Secret SCI level.
Department of Defense and federal government agencies that have Joint Staff approval can access the network. Joint Staff policy for obtaining service is in Chairman of the Joint Chiefs of Staff Instruction CJCSI 6215.01, dated Sept. 23, 2001. Upon approval by the Joint Staff, DISA will work with the customer and the appropriate military department to arrange for service.