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Home>ITU-T Q.733.3

ITU-T Q.733.3

ITU-T Q.733.3

Stage 3 description for call completion supplementary services using Signalling System No. 7 : Completion of calls to busy subscriber (CCBS)

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Completion of Calls to Busy Subscribers (CCBS) enables a calling user A, upon encountering a busy destination B, to be notified when the busy destination B becomes free and to have the service provider reinitiate the call to the specified destination B if user A desires.

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