Inmarsat-3 NCS
Similar to Inmarsat-4, SED’s systems plays an integral part in the real-time management of the Inmarsat-3 satellite resources. Centralized Network Coordination Stations (NCS), designed and built by SED, coordinate the usage of shared satellite resources amongst multiple geographically-separated ground gateways. The gateways, using out-of-band satellite control channels, communicate with the NCS to acquire demand assigned shared channels for short-to-medium duration SCPC-based services such as voice, fax, and ISDN.