Abstract: A method and system are adapted to provide telephony services to aggregate endpoints on an Internet Protocol Multimedia Subsystem (IMS) network. The method includes assigning one or multiple PUIDs for surrogate registration purposes during the provisioning of the aggregate endpoint, performing reliable surrogate registration on behalf of the aggregate endpoint, allowing multiple SBCs to perform surrogate registrations independently for the same aggregate endpoint to achieve reliability, and providing reliable connection from an IMS core to the aggregate endpoints via multiple S/BCs. The system includes one or more Session Border Controllers (S/BC), at least one set of Call/Session Control Functions (CSCF), and an HSS operatively coupled together.

Abstract: A method and system are adapted to provide telephony services to aggregate endpoints on an Internet Protocol Multimedia Subsystem (IMS) network. The method includes assigning one or multiple PUIDs for surrogate registration purposes during the provisioning of the aggregate endpoint, performing reliable surrogate registration on behalf of the aggregate endpoint, allowing multiple SBCs to perform surrogate registrations independently for the same aggregate endpoint to achieve reliability, and providing reliable connection from an IMS core to the aggregate endpoints via multiple S/BCs. The system includes one or more Session Border Controllers (S/BC), at least one set of Call/Session Control Functions (CSCF), and an HSS operatively coupled together.

Abstract: An exemplary method implemented by nodes in a telecommunication network includes associating a plurality of public user identities (PUIDs) into groups where each PUID represents a user served by a group of related endpoints, such as a private branch exchange (PBX). The groups are stored at the first node. Each group contains a group address that uniquely identifies the group and the PBX associated the users with PUIDs that are associated with the group. A first registration request is transmitted from the first node to an internet protocol multimedia subsystem (IMS) where the first registration request includes the group address and the PUIDs that are associated with the group. The first registration request seeks to establish implicit registration in the IMS of the PUIDs associated with the group with the group address. A reply from the IMS is received at the first node in response to the first registration request where the reply seeks authentication for the requested implicit registration of the PUIDs.

Abstract: A method for provisioning a peering relationship between the multimedia networks in a telecommunications system. The method comprises registering a customer with at least one of the multimedia networks; constructing the customer's mapping and routing data (including initial filter criteria) within each of the networks; synchronizing the customer's mapping and routing data between the multimedia networks; and storing the customer's mapping and routing data in a database in each of the multimedia networks. Further, the method results in network selection using the customer's mapping and routing data.

Abstract: An exemplary method implemented by nodes in a telecommunication network includes associating a plurality of public user identities (PUIDs) into groups where each PUID represents a user served by a group of related endpoints, such as a private branch exchange (PBX). The groups are stored at the first node. Each group contains a group address that uniquely identifies the group and the PBX associated the users with PUIDs that are associated with the group. A first registration request is transmitted from the first node to an internet protocol multimedia subsystem (IMS) where the first registration request includes the group address and the PUIDs that are associated with the group. The first registration request seeks to establish implicit registration in the IMS of the PUIDs associated with the group with the group address. A reply from the IMS is received at the first node in response to the first registration request where the reply seeks authentication for the requested implicit registration of the PUIDs.