Gregory S DeWitt

Title: Gregory S. DeWitt: Innovator in Switching System Control Arrangements

Introduction

Gregory S. DeWitt is a notable inventor based in Buffalo Grove, Illinois. He has made significant contributions to the field of telecommunications, particularly in the area of integrated services digital networks (ISDN). With a total of 2 patents, his work has advanced the methods and arrangements for managing control messages in switching systems.

Latest Patents

DeWitt's latest patents focus on innovative switching system control arrangements. One of his patents describes methods and arrangements for associating control messages received in the D-channel of an ISDN line with the corresponding call control process. This invention allows a single control channel to manage multiple calls simultaneously. When a control message is received, the system searches for the associated data structure to access the relevant control process. If no matching identity is found, a new process and data structure are created to handle the call setup.

Another patent by DeWitt addresses the proper association of alerting messages from ISDN user terminals with their respective control processes. In this system, when an external call request is received, a data structure is created that includes a broadcast Terminal Endpoint Identifier (TEI) and a selected call reference value. The user terminal responds with an alerting message that includes a unique TEI. The switching network then locates the corresponding data structure and updates the TEI to ensure that further messages can uniquely identify the engaged user terminal.

Career Highlights

Gregory S. DeWitt has had a distinguished career at American Telephone & Telegraph Company, specifically at AT&T Bell Laboratories. His work has been instrumental in developing advanced telecommunications technologies that enhance the efficiency and reliability of communication systems.

Collaborations

Throughout his career, DeWitt has collaborated with esteemed colleagues such as John J. Driscoll and Richard J. Basso. These partnerships have contributed to the innovative advancements in the field of telecommunications.

Conclusion

Gregory S. DeWitt's contributions to switching system control arrangements have significantly impacted the telecommunications industry. His innovative patents demonstrate a commitment to improving communication technologies, making him a noteworthy figure in the field.