Telecommunications system including transmultiplexer installed between digital switch and optical signal transmission fiber
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United States of America Patent
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Apr 22, 2003
Issued Date -
N/A
app pub date -
Apr 1, 1999
filing date -
Oct 7, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A telecommunications system provides telephone services to subscriber locations over dedicated optical fibers which extend in a 'star' configuration from a telephone central office. A transmultiplexer installed at the central office is connected between a digital switch and the optical fibers. The transmultiplexer has a plurality of FDM ports, each of which is connected to a respective one of the optical fibers. The transmultiplexer is connected by one or more TDM ports to the digital switch. Preferably, the transmultiplexer provides a concentrating function whereby the number of subscriber lines served by the transmultiplexer is greater than the total voice-grade channel capacity of the connection between the transmultiplexer and the digital switch.
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