Feature Description
If the UE requests P-CSCF discovery, then the SMF fetches the P-CSCF addresses from DNN configuration, which are locally provisioned under DNN with IMS-Support and list of P-CSCF addresses or P-CSCF FQDN.
Currently, only up to 64 address lists can be configured for both P-CSCF IPv4 and IPv6 addresses.