George D Kontopidis

US Patent:

54871026, Jan 23, 1996

Filed:

Dec 10, 1992

Appl. No.:

7/988554

Inventors:

Ralph F. Rothschild - Monsey NY
George D. Kontopidis - Dedham MA
Charles C. Linton - Southboro MA

Assignee:

Volt Information Sciences, Inc. - New York NY

International Classification:

H04M 100
H04M 300
H03G 300

US Classification:

379 67

Abstract:

In an operator system for providing services to subscribers in a public telephone network, a circuit board for controlling audio characteristics of audio signals in the public telephone network. The circuit board comprises an interface for receiving the audio signal from the public telephone network, an audio characteristics control circuit coupled to the interface for receiving the audio signal, adjusting the audio characteristics of the audio signal and for recording and generating voice messages to be transmitted to the public telephone network via the interface and a headset interface coupled to the audio characteristics control circuit for receiving the adjusted audio signal and providing an interface to at least two headsets.

US Patent:

20170195980, Jul 6, 2017

Filed:

Dec 31, 2015

Appl. No.:

14/985773

Inventors:

- Framingham MA, US
Carlos Guilherme Batista Heil - Norwood MA, US
George Kontopidis - Sherborn MA, US
Scott Stinson - Framingham MA, US

International Classification:

H04W 56/00

Abstract:

The subject technology can be embodied in a method that includes receiving, at a first device, a first signal and a second signal, the first and second signals being transmitted from a second device at two different time points. The method also includes obtaining, by the first device, transmission time-gap information representing a difference between the two different time points, and determining reception time-gap information representing a difference between two time points, the reception time-gap information being calculated based on a first clock signal. The method further includes determining, based on the transmission time-gap information and the reception time-gap information, at least one parameter that represents the difference between the first clock signal and a second clock signal associated with the second device, and generating, based on the at least one parameter, one or more control signals for reducing the difference between the first and second clock signals.