The link-control protocol for TACINTEL has been adapted to a format required for communication across a DAMA-supported channel. A polling scheme is used that can support a net membership of 23 subscribers within a satellite footprint. A portion of a DAMA 25-Khz channel on each of the FLTSATCOM satellites has been allocated for TACINTEL. At subscriber terminals, the baseband equipment is used for handling TACINTEL message traffic as well as for screening two subchannels of Fleet Broadcast transmissions.At both shore facilities and subscriber terminals, message traffic may be entered via the TACINTEL peripheral equipment such as the tape reader (not applicable to shore) or the display terminal keyboard. Most of the message traffic is entered automatically by systems or facilities connected to TACINTEL at those locations. TACINTEL baseband equipment uses an RF terminal in common with other subsystems at both the shore facilities and subscriber installations. The RF terminal at shore locations is an UHF Transceiver AN/WSC-5(V). At the subscriber installations, the UHF transceiver is an AN/GSC-3(V). The TACINTEL RF channel operates as a half-duplex UHF link, which can be operated at a transmission rate of 4800 Ups, 2400 bps, or 1200 Ups. The modulation of the RF signal is differentially encoded phase-shift keying (DESK). Tactical Intelligence Information Exchange Subsystem-Phase II (TACINTEL II+) is a Navy computer-based message communication system for automatic receipt and transmission of special intelligence (SI) and special compartmented information (SCI) messages geared primarily to contact reports and other tactically useful information. TACINTEL II+ will support real time indications and warning support to joint and component commanders through reliable high speed transfer of sensor data and intelligence information. Enhanced interoperability with other services, agencies, and allies will permit a level of integration of SI operations not achievable with current systems. The full capability will include voice, message, and data transfer among SCI-capable ships and aircraft, with gateways to shore nodes. TACINTEL II+ implements the Integrated Special Intelligence Communications portion of the Copernicus and ADNS architectures for joint C4I interoperability using open-architecture standards.