Edwin P Crabbe

US Patent:

49791087, Dec 18, 1990

Filed:

Dec 26, 1989

Appl. No.:

7/455891

Inventors:

Edwin P. Crabbe - Peoria AZ

Assignee:

AG Communication Systems Corporation - Phoenix AZ

International Classification:

G06F 1100
G06F 1114
G06F 1116
G06F 1134

US Classification:

364200

Abstract:

A configuration control of a duplex real time processor system without the need for third party configuration control circuitry is provided. A remote control system is connected to duplex real time processors via a pair of serial data links. These data links are configured in an active/standby arrangement. The serial links are connected to the duplex real time processors in such a way that each processor of the pair determines independently whether to assume an active or a standby role. Each real time processor bases this decision upon the identity of the serial link from which it is receiving data transmitted by a remote control system.

US Patent:

46032355, Jul 29, 1986

Filed:

May 21, 1984

Appl. No.:

6/612535

Inventors:

Edwin P. Crabbe - Peoria AZ

Assignee:

GTE Communication Systems Corporation - Phoenix AZ

International Classification:

H04M 322

US Classification:

179 18ES

Abstract:

This invention describes a method for mapping one or more of a number of input events to one or more of a number of output functions. This method involves the use of a memory device to perform the mapping between the input events and the output functions. This invention performs the mapping function with a minimum of hardware devices.

US Patent:

46370129, Jan 13, 1987

Filed:

Dec 23, 1985

Appl. No.:

6/812553

Inventors:

Edwin P. Crabbe - Peoria AZ

Assignee:

GTE Communication Systems Corporation - Phoenix AZ

International Classification:

H04Q 1104
G06F 1120

US Classification:

370 24

Abstract:

A multiple port serial link controller printed wiring card is shown. This printed wiring card provides at least two independent ports. These ports may be of different types such as RS-232 interface, RS-499 interface or other serial protocols such as HDLC, SDLC or BISYNC. These printed wiring cards may be combined in a duplex fashion to form two duplex (highly reliable) port transmission circuits. The duplex configuration requires a minimum amount of backplane wiring. This backplane wiring is permanent and requires no manual intervention for switching between transmission and mode types. Switching between transmission mode type and reconfiguring for the occurrence of faults may be accomplished by an automatic processor manipulation of a number of control points.

US Patent:

46928979, Sep 8, 1987

Filed:

Jan 28, 1987

Appl. No.:

7/009042

Inventors:

Edwin P. Crabbe - Peoria AZ

Assignee:

GTE Communication Systems Corporation - Phoenix AZ

International Classification:

G06F 1130

US Classification:

364900

Abstract:

This invention discloses a circuit for examining the value transmitted via a digital bus. A determination is made as to whether the value matches a predefined programmable value. An output indication is given for a match. In addition, this circuit may examine the transmitted value to determine whether it is within the bounds of a predefined range of values. This circuit utilizes a minimum of space and hardware components, due to its fabrication using RAM devices and a program logic array.

US Patent:

46370110, Jan 13, 1987

Filed:

Dec 23, 1985

Appl. No.:

6/812552

Inventors:

Edwin P. Crabbe - Peoria AZ

Assignee:

GTE Communication Systems Corporation - Phoenix AZ

International Classification:

H04Q 1104
G06F 1120

US Classification:

370 24

Abstract:

A multiple port serial link controller printed wiring card is shown. This printed wiring card provides at least two independent ports. These ports may be of different types such as RS-232 interface, RS-449 interface or other serial protocols such as HDLC, SDLC or BISYNC. These printed wiring cards may be combined in a duplex fasion to form two duplex (highly reliable) port transmission circuits. The duplex configuration requires a minimum amount of backplane wiring. This backplane wiring is permanent and requires no manual intervention for switching between transmission and mode types. Switching between transmission mode type and reconfiguring for the occurrence of faults may be accomplished by an automatic processor manipulation of a number of control points.