International Business Machines Corporation

Mpr Teltech Ltd.

Joe Geofroy

Piyush Bhupatrai Kothary

Christopher Michael Look

Belwinder Singh Barn

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.

Broad band transmission system

A method of transmitting broadband video services from a broadband digital signal source which includes forming the digital signal from said source into a plurality of channels of digital signals and modulating a plurality of carrier signals with respective channels of the digital signals. The resultant modulated channels are multiplexed to form a combined signal which is then used to modulate light from a laser light source. The modulated light signal is transmitted along a light fibre to a local distribution box where it is converted to electrical signals and broadcast to a number of subscriber set top terminals, Each set top terminal detects the modulated signal of a channel pre-assigned to that set top terminal. User control information is also received by that set top terminal and transmitted to the central office.

Growing community of inventors

Burnaby, Canada

Joe Geofroy