Maintenance of international telegraph, phototelegraph and leased circuits ; Maintenance of the international public telephone network ; Maintenance of maritime satellite and data transmission systems : recommendations M.800-M.1375
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Maintenance of international telegraph, phototelegraph and leased circuits ; Maintenance of the international public telephone network ; Maintenance of maritime satellite and data transmission systems : recommendations M.800-M.1375
(Blue book : CCITT, IXth Plenary Assembly, Melbourne, 14-25 November 1988, vol. 4 ; fasc. 4-2)
International Telecommunication Union, 1989
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