ITU-T E.776 PDF

Published Date: 09/01/1997

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Published Date: 01/01/1993

Stage 3 Description for Additional Information Information Transfer Supplementary Services Using DSS 1 Clause 1 - User-to-User Signalling (UUS) - Digital Subscriber Signalling System No. 1 - Stage 3 Description for Supp. Services Using DSS 1 (Study Group XI) 23 pp

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Published Date: 11/01/1988

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Published Date: 09/01/1992

Published Date: 09/01/1993

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Published Date: 06/01/1990