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:
Apr. 04, 1995
Filed:
Sep. 01, 1993
Yoshihisa Domoto, Sukagawa, JP;
Yasuo Wada, Fukushima, JP;
Hitachi Telecom Technologies, Ltd., Koriyama, JP;
Abstract
A telephone exchange system useful for a bank or brokerage house speech system or the like, which can accommodate a large number of lines (or trunks) and permit improvement of the reliability and call connection processing capacity. The system comprises exchange sub-systems A (EX-A) and B (EX-B) capable of independently executing an exchange operation and each accommodating a terminal. The terminal, on the other hand, has a speech channel switch for connecting a speech channel including a handset to either exchange sub-system A (EX-A) or B (EX-B). When a process of connecting a call is brought about in the terminal, that terminal selects one of the exchange subsystems and controls the speech channel switch for connecting the call to the selected exchange sub-system.