System for multiplexed communication between exchanges
US5436889A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jan 15, 1993 |
| Grant date | Jul 25, 1995 |
| Priority date | — |
| Expiry date | Jan 15, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2213/13396
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
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 exchan…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.