Selective Call Acceptance & Rejection
The selective call acceptance allows controlling incoming calls by making a list of telephone numbers which you are ready to accept. But incoming calls from subscribers that are not listed are directed to the answering machine by which the caller is informed that you do not accept calls at the moment.
Works on defining new network architecture are carried out by such
organizations as ITU-T, Multiservice Switching Forum, and International
Packet Communications Consortium.
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