Communication system for forming different networks on the same ring transmission line
US4965790A · kind A · utility
30Cited by
6References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 8, 1989 |
| Grant date | Oct 23, 1990 |
| Priority date | — |
| Expiry date | Mar 8, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J2203/0073
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Disclosed is a ring transmission system which incorporates both a narrowband network and a broadband ISDN network. The system comprises a plurality of nodes connected to a ring line. Each node comprises a drop/insert unit for dropping/inserting data by the use of a communication channel allocated to the node and an allocation changing circuit, whereby, a plurality of independent narrowband and broadband exchange networks are connected to a single ring transmission line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.