Optical communication system for cable-television signals...

Details Optical communication system for cable-television signals... Optical communication system for cable-television signals...

H - Electricity

04

B

H04B 10/20 (2006.01) H04J 14/02 (2006.01) H04N 7/22 (2006.01) H04H 1/02 (2006.01)

Patent

CA 2161732

In an optical communication system in which cable- television signals and subscriber-assigned tele- communication signals are transmitted over a passive optical network (4, 5) to at least one optical network termination (6), each optical network termination (6) requires two optical-to-electrical transducers. An optical network termination (6) is disclosed which requires only one optical-to-electrical transducer (24). The system has two transmitting devices (1, 2) which each transmit a respective optical signal (OTV, OD). In the second transmitting device (2), a second electric signal (SD), whose energy occupies a second frequency band is processed in such a way that the energy is concentrated in a subband lying outside the first frequency band (FB1) of a first electric signal (STV). The optical-to-electrical transducer (24) in the optical network termination (6) converts the received optical signals (OTV, OD) to an electric multiplex signal (EMUX), from which the two electric signals (STV, SD) are recovered.

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