General recommendations on telephone switching and signalling ; Functions and information flows for services in the ISDN ; Supplements : recommendations Q.1-Q.118bis
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General recommendations on telephone switching and signalling ; Functions and information flows for services in the ISDN ; Supplements : recommendations Q.1-Q.118bis
(Blue book : CCITT, IXth Plenary Assembly, Melbourne, 14-25 November 1988, vol. 6 ; fasc. 6-1)
International Telecommunication Union, 1989
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