ATM-based distributed network switching system
AssigneeSBC Technology Resources, Inc.
InventorsGeorge Allen, Steven Partridge, Samuel Sigarto, Tina Sigarto, Haifeng Bi, Richard Stephenson
Life of this patent
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Abstract
A distributed network switching system includes a data network. The system also includes multiple access interworking function (A-IWF) devices each operating as a gateway that enables customer premises devices to directly interface into the data network. The system further includes a centralized control and signaling interworking function (CS-IWF) device that performs call control functions and administrative functions and is adapted to interface narrowband and broadband signaling for call processing and control within the data network.
Claims20
A distributed call control system configured to operate with a signaling transfer point to transfer voice over a packet based network, the system comprising:
- a centralized call processor server that performs call control functions and is capable of converting common channel signaling received from the signaling transfer point into a plurality of packets, the call processor server sending packetized call processing and control information to at least one access interworking function (A-IWF) device(s) via the packet based network, each A-IWF being capable of dynamically establishing end-to-end connections to another A-IWF device, each A-IWF accommodating digital subscriber line (xDSL) access.
A distributed call processing system for transporting voice over a packet switching network, comprising:
- a plurality of access interworking function (A-IWF) devices each operating as a gateway interfacing data circuit type access into the packet switching network, the packet switching network comprising at least one end-to-end dynamically established connection, at least one of the A-IWF device(s) directly interfacing with the dynamically established connection to connect with another of the A-IWF devices.
A distributed network switching system, comprising:
- a centralized call processor server that performs call control and administration for call processing and control within a packet switching network and that receives public switched telephone network (PSTN) signaling, the centralized call processor server communicating with a plurality of access interworking function (A-IWF) devices that provide data circuit access into the packet switching network to enable voice transport across the packet switching network, at least one of the A-IWF devices being capable of dynamically establishing an end-to-end connection to another A-IWF,
- wherein the system provides the functionality of a standard network backbone and allows an access device connected via xDSL to communicate across the packet switching network.
Dependencies are inferred from the claim text.