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IMS
TS 24.228
–
§7.2.2
–
§7.3.2
–
§7.4.2
S-CSCF2 remembers (from the registration procedure) the UE Contact address and the next hop CSCF for this UE.
Route
: Built from the Path header stored at registration.
Via
/
Record-Route
: S-CSCF2 adds itself.
P-Called-Party-ID
: Includes the dialled URL with its parameters.