Communications: electrical – Continuously variable indicating – With meter reading
Patent
1993-02-09
1995-05-09
Yusko, Donald J.
Communications: electrical
Continuously variable indicating
With meter reading
3408258, 340827, 34082501, H01H 6700
Patent
active
054144159
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.
REFERENCES:
patent: 4517572 (1985-05-01), Dixon
patent: 5049877 (1991-09-01), Cooperman et al.
patent: 5130984 (1992-07-01), Cisneros
patent: 5153578 (1992-10-01), Izawa et al.
patent: 5200746 (1993-04-01), Yoshifuji
patent: 5239537 (1993-08-01), Sakauchi
Iguchi Kazuo
Kurano Takatoshi
Nishihara Motoo
Tokizawa Ikuo
Ueda Hiromi
Fujitsu Limited
Holloway III Edwin C.
NEC Corporation
Nippon Telegraph and Telephone Corp.
Yusko Donald J.
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