Richard Renand Christensen

Address:

10763 Liscard Rd S, Jacksonville, FL 32246

VIN:

3GYFK62887G196103

Make:

CADILLAC

Model:

ESCALADE EXT

Year:

2007

US Patent:

50519824, Sep 24, 1991

Filed:

Jul 27, 1989

Appl. No.:

7/385902

Inventors:

David K. Brown - Lewisville TX
Richard L. Christensen - Richardson TX

Assignee:

Data General Corporation - Westboro MA

International Classification:

H04Q 1104
H04J 312

US Classification:

370 582

Abstract:

Methods and apparatus are set forth for quickly making switched virtual connections (SVCs) in a digital circuit switch that integrates voice and data using common switch, control and distribution equipment. SVCs provide concurrent data connection service from one station device, such as a PC, to other station devices over a single line for each station device where the line may also carry voice and terminal data service. A switch control processor remembers connection requests from station devices and acts on opportunities to utilize available bandwidth in an optimal manner. Dynamic connection reconfiguration techniques allow the system to "scavenge" bandwidth unused by voice or terminal data traffic for SVCs thereby providing the largest possible data rate at any given time. Short signalling messages and indexed values are used in order to speed activation time for previously defined connections while resource allocation is performed by the switch control processor to further enhance system operating speed. The system features (a) reduced connection set up time compared with prior art circuit switch communications systems that need to establish a call each time frames are exchanged; (b) the elimination of expensive concentrators (for example, packet switches); (c) a broadcast channel; (d) enhanced traffic analysis capabilities; and (e) the communication security inherent in circuit switch architectures.

US Patent:

40384977, Jul 26, 1977

Filed:

May 12, 1975

Appl. No.:

5/576451

Inventors:

Arthur A. Collins - Dallas TX
John C. Bellamy - Dallas TX
Richard L. Christensen - Richardson TX

International Classification:

H04J 300

US Classification:

179 15AT

Abstract:

A marker circuit communicating with a stored program controller and switch stages, implementing pathfinding, connect, and disconnect operations while using address, status, and data buses to control the switch through exchange of connect information from the stored program controller and disconnect information from the switch control stores.

US Patent:

39565939, May 11, 1976

Filed:

Oct 15, 1974

Appl. No.:

5/514828

Inventors:

Arthur A. Collins - Dallas TX
John C. Bellamy - Dallas TX
Richard L. Christensen - Richardson TX

Assignee:

Artura A. Collins, Inc. - Dallas TX

International Classification:

H04Q 1104
H04J 300

US Classification:

179 15AQ

Abstract:

A time space time (TST) switch using two basic modules, a time switching module and a space switching module with individual module elements interconnectable to realize a great range of time division switch sizes and configurations. Control stores and state stores associated with respective switching elements are combined and incorporated into the time switch and space switch modules.