The Defense Information System Network (DISN) provides interoperable dial-up and dedicated subscriber services for point-to-point and multipoint video teleconferencing. In addition to connecting unclassified video teleconferencing facilities (VTF), DISN VS can support up to, and including, Top Secret bridging requirements.

DISN Video Services are available to all Department of Defense (DoD) and, with Joint Staff approval, all federal government departments/agencies, as well as their contractors.
Procedures for completing a service request can be found on the VS web site (http://disa.dtic.mil/disnvtc/index.html). Those who already have a transmission path can omit this procedure.