Apparatus and method for selective modem communications on shared, closed-loop communication systems
US6111663A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 11, 1998 |
| Grant date | Aug 29, 2000 |
| Priority date | — |
| Expiry date | Mar 11, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W84/08
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A closed-loop communication system includes a closed-loop communication link with a shared communication channel. A set of communication devices are connected to the closed-loop communication link. Each communication device has un-arbitrated access to the shared communication channel. A responding modem connected to the closed-loop communication link includes a modem signal detection circuit to identify a modem signal on the closed-loop communication link and respond to it by facilitating a squelch disable signal. A transmission squelch circuit squelchs all transmission signals from the responding modem except when the transmission squelch circuit is disabled in response to the squelch disable signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.