Does anyone has idea about practical technical realization? I know little bit from some marketing materials but it is not clear from technical point of view. Where and how is trigerred that to voice channel [towards calling user] IVR with some special audio (music etc.) should be connected? Where = probably in GMSC. What role play HLR, SCP (IN)?
beside other I found in some “marekting materials” that: Customers of the service have a specific mark in the Home
Location Register (HLR) – accoding this mark call is routed towards PRBT equipment providing PRBT service. What identifier in profile of subscriber in HLR is this “mark”?