| http://www.w3.org/ns/prov#value | - The P-CSCF stores information, i.e. a record for UE, e.g. ???IMEI@, UE IP address???, and forwards the call set-up message, e.g. INVITE message to the S-CSCF which responds by storing information, i.e. a record for UE, e.g. ???IMEI, P-CSCF address???, and forwarding the call set-up message, e.g. INVITE message, to the MGCF. The MGCF again stores information, i.e. a record for UE, e.g. ???IMEI, S-C
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