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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) |
| In force components |
Number
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Title |
Status |
Q.731.1 (07/96)
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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| Superseded and Withdrawn components |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
|
Title |
Status |
Q.731.1 (02/92)
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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Superseded
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