|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
The P-CSCF is the initial interface (SIP Server) between the mobile and the IMS. The address of the P-CSCF is discovered either as part of the SM (Session Management) procedures involved with establishing IP connectivity. That is, the address of the P-CSCF may be provided during the PDP Context Activation process. Alternatively it may be resolved after the PDP Context Activation process through the DHCP (Dynamic Host Configuration Protocol) Query/Response process. In this case the mobile will request an IP Address plus other variables in order to establish IP sessions.
