CONTENTS

 1     General
 2     Service capabilities
        2.1     Channel capabilities
        2.2     INMARSAT Standard-B bearer capabilities
        2.3     Teleservices
 3     Interworking scenarios
 4     Connection interface requirements
        4.1     General
        4.2     MSSC-network interface
        4.3     SES-MSSC interface
        4.4     Terminal to ship earth station interface
        4.5     Calling procedures
 5     Routing requirements
 6     Maritime and supplementary services
        6.1     Maritime services available via INMARSAT
        6.2     Supplementary services
Appendix I – INMARSAT Standard-B mobile-satellite system description
        I.1     Introduction
        I.2     Channel configurations
        I.3     Access control and signalling sub-system
        I.4     Communications sub-system
        I.5     Link layer formats and protocols
        I.6     Telephone services