Arrangement for utilizing a passive line concentrator in a managed token ring network
US5303387A · kind A · utility
6Cited by
9References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 8, 1992 |
| Grant date | Apr 12, 1994 |
| Priority date | — |
| Expiry date | May 8, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/42
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An arrangement whereby a passive line concentrator (100) can be connected in a managed token ring network includes a special concentrator port (200) in an active concentrator (10) which is adapted to have inserted the ring-in port (130) of the passive line concentrator. The special concentrator port of the active concentrator supplies a small phantom current to the passive concentrator, which returns the phantom current only if it has at least one active port. Detection of the returned phantom current controls insertion of the special concentrator port into the network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.