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: Q.731.1 |
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Q.731.1 : Stage 3 description for number identification supplementary services using Signalling System No. 7 : Direct-dialling-in (DDI)
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In force components |
Number
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Title |
Status |
Q.731.1 (07/96) |
Stage 3 description for number identification supplementary services using Signalling System No. 7 : Direct-dialling-in (DDI)
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In force
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Superseded and Withdrawn components |
Number
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Title |
Status |
Q.731.1 (02/92) |
Stage 3 description for number identification supplementary services using Signalling System No. 7 : Direct-dialling-in (DDI)
Published with ITU-T Q.731.8
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Superseded
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