Hello everybody, In TDM we have the following model: The user requests the CCF function located in "core network" by means of a subscriber signaling for a connection service. Consequently, the CCF function performs E164 routing+charging etc. and then uses the SS7 signaling (ISUP) to comunicate with the distant CCF in order to setup the requested connection. In SIP model I understand that SIP is the counterpart of ISUP, and that the inteligence is pushed towards the end user. My questions are: Is the SIP model that I described above valid? What happens with the CCF function: is it included in SIP protocol or does it still exist as a dedicated application, similar to the TDM model?
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