Abstract: Raman interference (also known as Raman scattering) during an idle frame transmission state in a passive optical network (PON) having radio frequency video overlay is reduced by generating and transmitting data packets having both random data and random length. Randomly varying both the packet data content and the packet length can achieve significant improvement in Raman interference reduction. The random packet data and length in effect spreads the interference across a spectrum wide enough that there is no interference effect perceptible to a television viewer.

Abstract: Raman interference (also known as Raman scattering) during an idle frame transmission state in a passive optical network (PON) having radio frequency video overlay is reduced by generating and transmitting data packets having both random data and random length. Randomly varying both the packet data content and the packet length can achieve significant improvement in Raman interference reduction. The random packet data and length in effect spreads the interference across a spectrum wide enough that there is no interference effect perceptible to a television viewer.

Abstract: A method for increasing the bandwidth of a uni-directional path switched SONET ring network by sacrificing protection of the information carried on the ring network. The method alters the way in which information is added into the ring at a node and how its is dropped at other nodes on the ring. Information added into the ring is added into only one of the two redundant paths of the SONET ring network, leaving the remaining path available to carry different, non-redundant information. Information dropped from the ring is also re-transmitted to down-stream nodes on the ring.