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� Home : ITU-T : Publications : Recommendations : Q�Series : Q.731.1 : Q.731.1 (02/92)
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Q.731.1�:�Stage 3 description for number identification supplementary services using Signalling System No. 7 : Direct-dialling-in (DDI) �

Recommendation Q.731.1 (02/92)

Approved in 1992-02-04

Status : Superseded

Published with ITU-T Q.731.8
No Document currently available

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