This Recommendation | International Standard specifies the N-plex multicast transport connection in which all participants are TS-users and one of them is TC-Owner. The N-plex multicast transport connection allows TS-users to send the multicast data to all the group members. It is noted that a TS-user is allowed to send the multicast data to the group, only if it gets a token from TC-Owner. This Specification describes the protocol for supporting the N-plex multicast transport, which includes the connection management (establishment, termination, user join and leave) and the reliability control mechanisms for the multicast data transport.