H - Electricity – 04 – J
Patent
H - Electricity
04
J
325/1, 363/1.9
H04J 3/02 (2006.01) H04B 10/00 (2006.01) H04B 10/12 (2006.01) H04M 11/06 (2006.01) H04Q 11/04 (2006.01)
Patent
CA 1160769
ABSTRACT OF THE DISCLOSURE A service integrated, time multiplex digital signal transmission system for transmitting narrowband and broadband signals between a central ex- change terminal and a subscriber terminal, which system includes a optical fiber waveguide path connected between the terminals, a transmitter device at one terminal composed of sources of such narrowband and broadband signals and multiplexers connected for combining the signals provided by the sources into a multiplex signal and for supplying such multiplex signal to the optical fiber waveguide path, and a receiver device at the other terminal composed of demultiplexers connected to the optical fibre waveguide path for receiving multiplex signals from that path and separating the received multiplex signals into narrowband signals and broadband signals. The device at the subscriber terminal is normally supplied with operating power by local utility mains. The system further includes a charge accumulator for supplying operating power independently of the local mains, connected for supplying such power to the device at the subscriber terminal in the event of interruption of the power supply provided by the local mains, and devices connected for switching the system to effect signal transmission at a reduced bit rate in the event of such local mains power interruption.
390975
Rauth Erich
Schmack Hans-Jurgen
Ant Nachrichtentechnik G.m.b.h.
Fetherstonhaugh & Co.
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