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ITU-T Q.922 Digital subcriber signalling system no. 1 (DSS 1), data link layer, ISDN data link layer specification for frame mode bearer services
ITU-T X.733 Information technology - Open Systems Interconnection - Systems Management: Alarm reporting function
ITU-T Q.951.2 Stage 3 description for number identification supplementary services using DSS 1 : Multiple subscriber number (MSN)
ITU-T Q.955.1 Stage 3 description for community of interest supplementary services using DSS 1 : Closed user group
ITU-T Q.951.1 Stage 3 description for number identification supplementary services using DSS 1, Section 1: Direct-Dialling-In (DDI), Section 2: Multiple Subscriber Number (MSN), Section 8: Sub-adressing (SUB)
ITU-T Q.733.1 Stage 3 description for call completion supplementary services using no. 7 signalling system, Section 1: Call waiting (CW)
ITU-T Q.731.8 Stage 3 description for number identification supplementary services using Signalling System No. 7 : Sub-addressing (SUB)
ITU-T Q.81.2 Stage 2 description for number identification supplementary services : Multiple subscriber number
ITU-T Q.83.2 Stage 2 description for call completion supplementary services, Section 2: Call hold (Rev.1)
ITU-T Q.85.1 Stage 2 description for community of interest supplementary services : Closed user group
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