summary : 'When the P-CSCF receives a subsequent request with unknown URI in Route header from the originating UE it either rejects it with a SIP 403 response or forwards it with an updated Route header'
summary : 'When the P-CSCF receives a subsequent request with unknown URI in Route header from the originating UE it either rejects it with a SIP 400 response or forwards it with an updated Route header'
summary : 'When the P-CSCF receives a subsequent request with unknown URI in Route header from the terminating UE it either rejects it with a SIP 403 response or forwards it with an updated Route header'
summary : 'When the P-CSCF receives a subsequent request with unknown URI in Route header from the terminating UE it either rejects it with a SIP 400 response or forwards it with an updated Route header'