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.