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. 25, 1995
Filed:
Jan. 15, 1993
Teruyuki Matsumoto, Yokohama, JP;
Kansuke Kuroyanagi, Yokohama, JP;
Morihiko Kurata, Yokohama, JP;
Akihiro Kamiya, Yokohama, JP;
Hitachi Ltd., Tokyo, JP;
Hitachi Software Engineering Co., Ltd., Tokyo, JP;
Abstract
A multiplexed communication system for automatically setting up a multiplexed call circuit between exchanges upon occurrence of a call only when the multiplexed call circuit is required while otherwise releasing the multiplexed call circuit. The multiplexed communication system includes a plurality of exchanges, each of which includes multiplexing/demultiplexing apparatus for compressing and multiplexing data inputted from first input/output to thereby output the compressed and multiplexed data to second input/output ports and for demultiplexing and expanding data inputted from the second input/output to thereby output the demultiplexed and expanded data to the first input/output port, control information messaging apparatus for messaging control information, first detection apparatus for detecting occurrence of a compressible call, and second detection apparatus for detecting that all the calls connected to the first input/output ports have been released. Upon detection of the compressible call by the first detection apparatus, a circuit is set up between the exchanges through the multiplexing/demultiplexing apparatus while the control information is transferred between the exchanges through the call control information messaging means, to thereby connect the call to the first input/output ports between the exchanges. When it is detected that all the calls connected to the first input/output ports have been released, the circuit between the exchanges is released.