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?

Thank you!
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