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ITU-T I.251.2 Number identification supplementary services : Multiple Subscriber Number
ITU-T I.251.3 Number identification supplementary services : Calling Line Identification Presentation
ITU-T I.251.7 Number identification supplementary services : Malicious call Identification
ITU-T I.251.4 Number identification supplementary services : Calling Line Identification Restriction
ITU-T I.251.8 Number identification supplementary services : Sub-addressing supplementary service
ITU-T I.252.2 Call offering supplementary services : Call Forwarding Busy
ITU-T I.252.3 Call offering supplementary services : Call Forwarding No Reply
ITU-T I.252.4 Call offering supplementary services : Call Forwarding Unconditional
ITU-T I.252.5 Call offering supplementary services : Call Deflection
ITU-T I.253.2 Call completion supplementary services : Call Hold
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