Digital communication network architecture for providing universal information services
Номер патента: CA1254978A
Опубликовано: 30-05-1989
Автор(ы): David A. Spicer, David Vlack, Harry E. Mussman, Harvey R. Lehman, William P. Lidinsky
Принадлежит: American Telephone and Telegraph Co Inc
Опубликовано: 30-05-1989
Автор(ы): David A. Spicer, David Vlack, Harry E. Mussman, Harvey R. Lehman, William P. Lidinsky
Принадлежит: American Telephone and Telegraph Co Inc
Реферат: Abstract: A switched integrated wideband and narrowband multiservices digital network is an ISDN providing universal information services based on wideband and narrowband voice, data, and video communications. It comprises a plurality of service areas, each served by a central switching node. The central node is connected to a plurality of remote nodes by feeder optical fibers and a control bus extension. Network interface equipment at subscribers' premises is connected to remote nodes by distribution optical fibers. Each distribution fiber is wavelength-division multiplexed and carries modulated (pulse-analog, pulse-code, or differential pulse-code) wideband digital channels and a multiplexed channel comprising time-division-multiplexed narrowband digital channels. One narrowband channel carries all signaling messages. Feeder fibers are wavelength-division multiplexed and carry modulated wideband digital channels, and multiplexed channels each comprising a plurality of time-division-multiplexed distribution multiplexed channels. Each remote node comprises a digital space-division switch for wideband channels, and a digital time division multiplexer and demultiplexer for multiplexed channels. Each central node comprises a digital space-division switch for wideband channels, and a digital time-division switch for narrowband channels. All switches are controlled by a central node control complex over a control bus and its extensions. Signaling messages are transferred between the signaling-message-carrying narrowband channels and the central node complex by a subscriber signaling subsystem via the narrowband switch and the control bus. A central node optionally includes interfaces to other communication systems, and trunk communication fiber and CCIS signaling fiber connections to other central nodes of the network.
Digital communication network architecture for providing universal information services
Номер патента: GB2184327B. Автор: David Vlack,William Paul Lidinsky,Harry Edward Mussman,Harvey Robert Lehman,David Alan Spicer. Владелец: American Telephone and Telegraph Co Inc. Дата публикации: 1989-10-11.