ISDN over satellite networks

The authors describe work on the implementation and testing of ISDN (integrated services digital network) earth station interfaces for use with existing and future processing satellites. Satellite solutions for both narrowband and broadband ISDN (NISDN and BISDN) are presented. Two NISDN earth station interfaces, one applicable to NASA´s Advanced Communications Technology Satellite and the other to the INTELSAT system, have been developed. Ongoing activities include the development of a broadband BISDN earth station interface card that can efficiently handle the asynchronous transfer mode (ATM)