Digital subscriber line termination with signalling
US5144625A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1990 |
| Grant date | Sep 1, 1992 |
| Priority date | — |
| Expiry date | Dec 27, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M3/244
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and system for interfacing a transmission facility with a digital subscriber line to enable transmission of digital voice communication and associated digital signalling are provided. A digital signal from the digital subscriber line is demultiplexed into a digital communication signal and a digital input control signal having a first sequence providing standard framing pattern, a second sequence providing signalling identification, and a third sequence providing signalling information. A monitor monitors the sequence of the input control signal and produces a signalling identification detect signal when the second sequence is detected and signalling enablement output when the third sequence is detected. The communication signal from the digital subscriber line is selectively multiplexed with the signalling information from the input control signal. The signalling information is output to the transmission facility when the signalling-enablement output is produced by the monitor. A digital transmission signal from the transmission facility is demultiplexed into a communication signal and signalling signal. A generator generates a digital output signal in a first sequence to…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.