Voice over digital subscriber line call redirection for lifeline service
US6400803B1 · kind B1 · utility
21Cited by
12References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 17, 1999 |
| Grant date | Jun 4, 2002 |
| Priority date | — |
| Expiry date | Aug 17, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M19/00
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Customer premises equipment for a telecommunications DSL subscriber is adapted to provide a lifeline voice service under a fault condition, e.g. a power failure at the subscriber station. The arrangement incorporates a number of switchable local subscriber ports each providing access to a respective telephone instrument, and a router circuit whereby, under normal conditions, voice calls may be routed each to a respective loop port. Under a fault condition the router directs an incoming call to a selected port to provide the lifeline service. Further calls may be barred when such a lifeline call is in progress.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.