This ETS specifies the Call Completion on Busy Subscriber (SS-CCBS) supplementary service which is applicable to various basic services supported by TETRA Switching and Management Infrastructures (SwMIs). TETRA basic services are specified in ETS 300 392-2 [8]. SS-CCBS allows completion of a call to a subscriber that was unsuccessful because of a busy condition without making a new call attempt.
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prSSH ETS 300 392-10-13:1999 ed.2
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