Modem with remote speed-change capability
US4956851A · kind A · utility
26Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 25, 1988 |
| Grant date | Sep 11, 1990 |
| Priority date | — |
| Expiry date | May 25, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/50
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A modem which can automatically switch between protocols at different signalling rates. The protocal with non-standard signalling rates has a training sequence which initially has distinctive frequency-domain characteristics. Thus, as soon as one modem begins to send a training sequence, the other modem can distinguish which training sequence has been started. Thus, speed changes between protocols at different signalling rates can be remotely initiated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.