System and method of transmitting voice over digital subscriber line
US6259708A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 1999 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | Feb 4, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2602
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system for digitizing voiceband signals at the remote terminal (20) of a Digital Subscriber Line (DSL) connection and embedding the digitized voiceband component into an active DSL data stream using a DSL modem (24). Voiceband transmissions between the remote terminal (20) and the central office call switching equipment (1) occur in the analog domain when the DSL modem (28) is OFF and in the digital domain when the DSL modem (28) is ON with the digital voiceband signals transmitted over a DSL link. Preferably, the remote terminal (20) can drive a real analog telephone (30) by providing battery feed, ring-trip detection, off-hook detection and ringing generation (60) In-house 4-wire lines pairs (21, 23) are configured between the modem, telephones and computer or home network to permit all digital transmission from the subscriber to the central office.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.