Acronyms von A bis Z
D.250
Empfehlung der "CCITT"/"ITU" von 07/91: General charging and accounting principles for non-voice services provided by interworking between the ISDN and existing public data networks
Empfehlung der "CCITT"/"ITU" von 07/91: General charging and accounting principles for non-voice services provided by interworking between the ISDN and existing public data networks