Digital communication network architecture for providing universal information services
US4763317A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 1985 |
| Grant date | Aug 9, 1988 |
| Priority date | — |
| Expiry date | Dec 13, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J2203/0066
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A switched integrated wideband and narrowband multiservices digital network (FIGS. 1 and 2) is an ISDM providing universal information services based on wideband and narrowband voice, data, and video communications. It comprises a plurality of service areas (100, 101), each served by a central switching node (110). The central node is connected to a plurality of remote nodes (103) by feeder optical fibers (107) and a control bus extension (106). Network interface equipment (104) at subscribers' (102) premises is connected to remote nodes by distribution optical fibers (105). Each distribution fiber is wavelength-division multiplexed and carries modulated (pulse-analog, pulse-code, or differential pulse-code) wideband digital channels (205) and a multiplexed channel (206) comprising 32 time-division-multiplexed narrowband digital channels (207). One narrowband channel (207D) carries all signaling messages. Feeder fibers are wavelength-division multiplexed and carry modulated wideband digital channels (305), and multiplexed channels (306) each comprising a plurality of time-division-multiplexed distribution multiplexed channels. Each remote node comprises a digital space-division swi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.