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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
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| In force components |
Number
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Title |
Status |
D.251 (11/88)
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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
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In force
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