When a dialled B party is providing announcement ( i.e out of coverage are/unreachable/switched off) and releases the call after the announcement, what should be the REL cause(either normal call clearing/normal unspecified etc).
Does the B party should provide ANM (answer message) for announcements?
if A-party is PSTN side, then announcement must be provided in ACM message (the field “in-band information is availabel” points that ACM is with announcemnt). After this REL 31 (normal, unspecified) must be sent to A-party
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