Acronyms von A bis Z
D.220
Empfehlung der "CCITT"/"ITU" von 03/91: Charging and accounting principles to be applied to international circuit-mode demand bearer services provided over the integrated services digital network (ISDN)
Empfehlung der "CCITT"/"ITU" von 03/91: Charging and accounting principles to be applied to international circuit-mode demand bearer services provided over the integrated services digital network (ISDN)