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• CCITT Rec. U.61 (11/1988) – DETAILED REQUIREMENTS TO BE MET IN INTERFACING THE INTERNATIONAL TELEX NETWORK WITH MARITIME SATELLITE SYSTEMS
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• APPENDIX I – Signalling characteristics and timing of the INMARSAT telex service
• I.1 Introduction
• I.2 Ship Earth Station (SES) originated telex call
• I.3 Terrestrial originated telex call
• I.4 Telex clearing sequence
• APPENDIX II – Method employed at the Nordic coast earth station to avoid periods of Z polarity within the answerback signal
• References