Signal transfer arrangement

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 4757526
SERIAL NO

07039054

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A telecommunication system providing centrex services, and having an attendant position serving users from diverse customer locations. Users at a satellite customer location connected to one exchange and employing ISDN terminals are provided with access to an attendant position at a main customer location connected to another exchange. ISDN messages from users at the satellite location requesting attendant services are recognized at the exchange associated with the satellite location and transmitted as analog flash signals via an analog signaling trunk to the exchange to which the attendant is connected. The exchange receiving the flash signals interpret the signals as requests for attendant services and provides the necessary connections to the attendant's position.

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First Claim

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Patent Owner(s)

Patent OwnerAddress
AMERICAN TELEPHONE AND TELEGRAPH COMPANY A CORP OF NEW YORK550 MADISON AVENUE NEW YORK NY 10022
BELL TELEPHONE LABORATORIES INCORPORATED A CORP OF NEW YORK600 MOUNTAIN AVENUE MURRAY HILL NJ 07974-2070

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Foster, Eugene W Naperville, IL 1 47
Glapa, Martin J St. Charles, IL 2 132

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