The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 26, 1994
Filed:
Nov. 19, 1991
Takashi Aoki, Akishima, JP;
Kabushiki Kaisha Toshiba, Kanagawa, JP;
Abstract
A key telephone system is disclosed including a key service unit to which are connected a communication network such as public telephone network, a plurality of data terminal equipments such as personal computers, and interface conversion unit such as MODEM. When a call comes from external calling party into this system, the key service unit establishes a communication path between the network and the interface conversion unit so that succeeding data transmitted from the calling party supplied to the interface conversion unit. The succeeding communication data includes an extension number selected by the calling party, and the extension number is informed to the key service unit from the interface conversion unit. Then, the key service unit establish a communication path between a single data terminal equipment designated by the extension number and the interface conversion unit, so that the calling party can communicate with the designated data terminal equipment.