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D.251 : General charging and accounting principles for the basic telephone service provided over the ISDN or by interconnection between the ISDN and the public switched telephone network

Recommendation D.251

In force components
Number
Title Status
D.251 (11/88)
 
General charging and accounting principles for the basic telephone service provided over the ISDN or by interconnection between the ISDN and the public switched telephone network   In force

 

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Updated : 2003/02/10