Gte communication systems corporation patents

Three-port conference circuit for use in a digital telephone system

Filed: October 7th, 1985 [Granted]

Assignee: GTE Communication Systems Corporation

Patent Number: 4677610

the other compared port's sample when the other port is designated the speaker from the last frame in a last frame speaker memory, that port will be ...

Repeater for carrier subscriber communication system

Filed: December 10th, 1984 [Granted]

Assignee: GTE Communication Systems Corporation

Patent Number: 4633459

... [54] REPEATER FOR CARRIER SUBSCRIBER COMMUNICATION SYSTEM [75] Inventor: Tom L. Blackburn, San Jose, Calif. [73] Assignee: GTE Communication Systems ...

Method for locating faults in a carrier subscriber communication system

Filed: December 10th, 1984 [Granted]

Assignee: GTE Communication Systems Corporation

Patent Number: 4658395

... San Jose, Calif. [73] Assignee: GTE Communication Systems Corporation, Phoenix, Ariz. [ * ] Notice: The portion of the term of this patent subsequent to ...

Apparatus for locating faults in a carrier subscriber communication system

Filed: December 10th, 1984 [Granted]

Assignee: GTE Communication Systems Corporation

Patent Number: 4642426

... [54] APPARATUS FOR LOCATING FAULTS IN A CARRIER SUBSCRIBER COMMUNICATION SYSTEM [75] Inventor: Tom L. Blackburn, San Jose, Calif.

Methods and systems for call management with user intervention

Filed: November 24th, 2003 [Granted]

Assignee: Verizon Data Services LLC Verizon Services Corp GTE Communication Systems Corporation

Patent Number: 7912193

Illllllllllllllllllllllllllllllllllllllllllllllli US007912193B2 (12) United States Patent ao) Patent no.: us 7912193 B2 Chingon et al.

Anti-mutilation circuit for protecting dynamic memory

Filed: April 6th, 1984 [Granted]

Assignee: GTE Communication Systems Corporation

Patent Number: 4630197

ANTI-MUTILATION CIRCUIT FOR PROTECTING DYNAMIC MEMORY BACKGROUND OF THE INVENTION 5 The present invention pertains to circuitry for the protection of the ...

Frame checking arrangement for duplex time multiplexed reframing circuitry

Filed: October 30th, 1986 [Granted]

Assignee: GTE Communication Systems Corporation

Patent Number: 4740961

FRAME CHECKING ARRANGEMENT FOR DUPLEX TIME MULTIPLEXED REFRAMING CIRCUITRY 5 BACKGROUND OF THE INVENTION The present invention pertains to digital ...

Real time usage meter for a processor system

Filed: September 24th, 1984 [Granted]

Assignee: GTE Communication Systems Corporation

Patent Number: 4713791

REAL TIME USAGE METER FOR A PROCESSOR SYSTEM BACKGROUND OF THE INVENTION 5 This invention pertains to real time usage of processing systems and more ...