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. 15, 1997
Filed:
Jun. 06, 1995
Toshihiko Ikeno, Yokohama, JP;
Nobuhiro Ikeda, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A private branch exchange so adapted that a plurality of call transfer addresses for an incoming call can be set for an ISDN terminal includes a controller having a decision unit for analyzing the incoming call and deciding an extension terminal that is to receive the incoming call, and a first transmitting unit for transmitting set-up messages to an ISDN extension interface. The ISDN extension interface accommodates a line connected to one or more ISDN terminals and has a second transmitting unit for transmitting a predetermined first message of the set-up messages to the terminal to which the set-up messages from the first transmitting unit are to be sent, a receiving unit for receiving a predetermined second message from the ISDN terminal that has received the first message, and a third transmitting unit for transmitting this received message to the controller. The controller further has an analyzing unit for analyzing a transfer-addressed number, notification of which is given by the ISDN terminal, contained in the message from the third transmitting unit of the ISDN extension interface, and a notifying unit for notifying a plurality of extension terminals, which correspond to the transfer-addressed number, of the incoming call via the ISDN extension interface.