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:
Aug. 29, 1995
Filed:
Oct. 14, 1993
Naoyuki Miyamoto, Kawasaki, JP;
Fujitsu Limited, Kanagawa, JP;
Abstract
A network is constructed by connecting trunk circuits through a trunk in an exchange in which the trunk circuit connects with a trunk, an extension circuit connects with a terminal, and the trunk circuit is connected to the extension circuit by a path switch controlled by a calling processor and by connecting the terminals to the extension circuit. Control information is transmitted and received by utilizing a channel of a not-in-service trunk up to a time before receiving a response of a remote party to a trunk connection call. The control information is transmitted and received by utilizing a no-signal area in the trunk from a time after receiving the response of the remote party to the trunk connection call to an end-of-service time. The control information on the connection call between two exchanges and the control information on an operational management maintenance of the exchanges are thereby transmitted and received.