This is a delta document detailing the deviations of the Trans-European Trunked RAdio (TETRA) Call Completion to Busy Subscriber (CCBS) supplementary service from the Standard ECMA 185 [2] stage 1 descriptions. Stage 1 is an overall service description from the users point of view but does not deal with the details of the human interface itself.
IN_DEVELOPMENT
prSSH ETS 300 392-10-13:1996 ed.1
40.20
DIS ballot initiated: 12 weeks
Feb 9, 2026
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