Multiplex communications – Wide area network – Packet switching
Patent
1991-07-30
1993-02-23
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 582, H04J 302, H04J 1408
Patent
active
051896737
ABSTRACT:
In an integrated telecommunications network adapted to provide narrowband telephony signals and broadband switched video signals, control signals for the broadband video signals are transmitted in the narrowband as baseband signals, which are frequency division multiplexed with the broadband switched video signals. The video control signals are transmitted over the same transmission lines as the broadband video signals and do not require the installation of additional transmission lines. Control signals from a plurality of subscribers are multiplexed together at a network unit and are transmitted as a channel on an optical fiber, after which the channels from a plurality of network units are further multiplexed together to form a frame of control channels which are transmitted to a video controller unit.
REFERENCES:
patent: 4811335 (1989-03-01), van Baardwijk et al.
patent: 5042062 (1991-08-01), Lee et al.
patent: 5115427 (1992-05-01), Johnson, Jr. et al.
Ball Karen V.
Burton Larry W.
Czerwiec Richard M.
Matsumura Paul M.
Sutherland Joseph E.
Alcatel Network Systems, Inc.
Jung Min
Olms Douglas W.
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