This Recommendation describes the use of access node control protocol (ANCP) on the Rp interface. It defines the associated signalling architecture, specifies the signalling flows required to support combined unicast and multicast admission control. It also specifies profiles of the ANCP and resource connection initiation protocol (RCIP) [ITU-T Q.3322] required for this task. Interworking between RCIP and ANCP is also specified in this Recommendation.