This Recommendation provides for a means to establish a fully automatic radiotelephone service for vessels to send and receive calls via the public switched telephone network (PSTN) using MF/HF equipment. The Recommendation
contains detailed operational
ITU-R M.1082-1-1997 history
1997ITU-R M.1082-1-1997 International Maritime MF/HF Radiotelephone System with Automatic Facilities Based on Digital Selective Calling Signalling Format