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:
May. 09, 1995
Filed:
Feb. 09, 1993
Hiromi Ueda, Kanagawa, JP;
Ikuo Tokizawa, Kanagawa, JP;
Kazuo Iguchi, Kanagawa, JP;
Haruo Yamashita, Kanagawa, JP;
Takatoshi Kurano, Tokyo, JP;
Motoo Nishihara, Tokyo, JP;
Nippon Telegraph and Telephone Corp., Tokyo, JP;
Fujitsu Limited, Kanagawa, JP;
NEC Corporation, Tokyo, JP;
Abstract
In a cross-connect apparatus for use in selectively connecting a plurality of input transmission paths to a plurality of output transmission paths, each of the input and the output transmission paths is divided into first through m-th groups each of which is composed of first through n-th transmission paths, first through m-th elementary switch modules are located between the input and the output transmission paths, n in number, of the first through the m-th groups and are connected to a connection switch module through first to m-th input internal path groups each of which is composed of n internal paths and which are extended into first through m-th switch units each of which has input terminals, n(m-1) in number, and output terminals, n in number, where n and m are natural numbers. An i-th one of the switch units in the connection switch module is connected to the input path groups, (m-1) in number, except an i-th internal path group, where i is a natural number between unity and m, both inclusive. The output terminals of the i-th switch unit is connected to an i-th one of the elementary switch modules through an i-th one of output internal paths. This structure serves to avoid an unnecessary detour route in the cross-connect apparatus.