Acronyms von A bis Z
D.230
Empfehlung der "CCITT"/"ITU" von 1988: General charging and accounting principles for supplementary services associated with international telecommunication services provided over the Integrated Services Digital Network (ISDN)
Empfehlung der "CCITT"/"ITU" von 1988: General charging and accounting principles for supplementary services associated with international telecommunication services provided over the Integrated Services Digital Network (ISDN)