Interfacing the Automated Maritime Mobile Telephone System with the U.S. public switched telephone network

Robert F. Linfield; Thijs de Haas

Abstract: This report summarizes the characteristics of the U. S. public switched network and the maritime radio service, which impact the development of an Automated Maritime Mobile Telephone System (AMMTS). Features and performance parameters which appear desirable to an AMMTS user are reviewed and some basic system concepts capable of satisfying these user's needs are presented. The interface between the public switched network and coast stations serving the maritime community is discussed in detail. Techniques for automatically placing a call to ships whose "location is unknown are described. The development of an AMMTS involves a number of issues which may be different in the U. S. than in other countries of the world. The final section of the report defines some issues requiring further study.

Keywords: maritime communications; automated telephone systems; network interfacing

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Disclaimer: Certain commercial equipment, components, and software may be identified in this report to specify adequately the technical aspects of the reported results. In no case does such identification imply recommendation or endorsement by the National Telecommunications and Information Administration, nor does it imply that the equipment or software identified is necessarily the best available for the particular application or uses.

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