Importance

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Abstract

A broad band broadcasting transmission system for sending broad band downstream data and telephone signals from a central office to a number subscriber set top terminal. Each frame of data is marked to indicate the set top terminals it is to be received by. A downstream light fiber is located between the head office and a curbside box. A transmitter transmits the frames along a light fiber to a SAC box. A converter converts the light signals from the light fiber to electrical signals. A distribution line coupled to the curbside box carries the electrical signals to a plurality of drop line twisted pair conductors connected to the distribution line. The drop lines are coupled via a residential units to the set top terminals. The downstream data is transmitted in a single broad frequency band in a frequency range starting sufficiently greater than zero so that distinct frequency bands are available between zero and the starting frequency for the transmission of ordinary telephone service and upstream signals from the set top terminals to the central office.

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First Claim