ETR 123-1996 Broadband Integrated Services Digital Network (B-ISDN); Parameters and Mechanisms Provided by the Network Relevant for Charging in B-ISDN Second Edition
ETSI - European Telecommunications Standards Institute
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ETR 123-1996
ETR 123-1996 history
1996ETR 123-1996 Broadband Integrated Services Digital Network (B-ISDN); Parameters and Mechanisms Provided by the Network Relevant for Charging in B-ISDN Second Edition
1994ETR 123-1994 Broadband Integrated Services Digital Network (B-ISDN); Parameters and Mechanisms Provided by the Network Relevant for Charging in B-ISDN