Method and system for conveying multiple calls on a single telephone line
US6324167A · kind A · utility
14Cited by
8References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 23, 1999 |
| Grant date | Nov 27, 2001 |
| Priority date | — |
| Expiry date | Feb 23, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2213/13381
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A system for implementing multiple communication channels on a single twisted pair transmission line is disclosed. The system derives additional communication channels by way of a separate transceiver unit for each derived line. Each transceiver unit communicates in a separate predetermined frequency band. Each transceiver unit, upon connection to the transmission line, automatically utilizes the lowest unoccupied frequency band by monitoring each frequency band for the presence of signal power. Thus, as many derived lines as will be supported by the customer transmission loop can be readily added.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.