Network Access Corporation

Texas Instruments Corporation

Gerald K Coley

Rajendra Patel

David Wayne Thorn

Kenneth A Lauffenburger

Girish Patel

John L Tibbits

Edward P Kuzemchak

Charles C Miller

Yeong-Haw Yang

Zye-Kong Cheng

Donald D Binford, Jr

Edmund D Zink

Ashok Trivedi

A graphical solutions development system using placement of blocks representing hardware/software functionality on a computer screen drawing and connecting the blocks by wires representing data and control flow to create application programs and/or hardware design. The blocks are instances of development components that include intelligence for optimization within a detected environment. This permits effective programming of digital signal processors and system design by users not expert in digital signal processing programming and system design.

Graphical development system and method

The invention relates to upgrading existing telephone central offices which utilize electromechanical or electronic switching equipment incapable of using the SS7 protocol. In particular, it relates to providing the switching equipment with the capability of controlling the connection, management, and disconnection of telephone circuits using Signaling System Number 7, a national and international standard set of protocols for providing such circuit control and providing and receiving information via the SS7 protocol for enabling enhanced service in the switching equipment.

Apparatus and method for providing existing telephone switching

A method and apparatus is described for providing extended subscriber features, e.g., equal access, to otherwise non-conforming central offices of a telephone switching system. According to the invention, a register module is interposed between the subscriber line and an input of the central office for intercepting digits from the subscriber line intended for the central office and for receiving subscriber information from the central office identifying the subscriber line. The register module includes a memory having a plurality of address locations and a control circuit for analyzing the intercepted digits to determine whether processing of the subscriber call requires an extended subscriber feature. If so, the intercepted digits are processed to generate a coded signal, the coded signal including the address location where the stored digits and the subscriber information resides in the memory. The coded signal is then used by the marker in the central office to select an appropriate outgoing trunk to complete the subscriber call. An associated trunk module interposed between the switch element of the central office and the outgoing trunks receives the coded signal and in response thereto polls the register module to request transmission of the digits and the subscriber information. Upon receipt of this data, the trunk module outputs a signal to the selected trunk.

Method and apparatus for enhancing the operating capabilities of a

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Terrell, TX, United States of America

Gerald K Coley