Patent ID: 9032468
Filing Date: 2015-05-12
Classification: H04B,H04N

Abstract:
1. A head end for initiating dispersion compensation, said head end comprising: (a) the head end operatively connected to a fiber optic transmission having a length from the head end to at least one of a hub or a node, the head end adjusting a data rate of the fiber optic transmission line between the head end and the at least one of the hub or the node to a data rate that is lower than that of an operating rate of the fiber optic transmission line; (b) a transmitter that selectively sends a first message along said fiber optic transmission line in accordance with the data rate of the fiber optic transmission line that is adjusted to be lower than that of the operating rate of the fiber optic transmission line; (c) a receiver capable of receiving a second message from the at least one of the hub or the node, the second message having content based on said first message and returned to the transmitter at a data rate that is lower than that of an operating rate of the fiber optic transmission line, the data rate of the second message being the same or different from the data rate at which the first message is sent along the transmission line; (d) the head end configured for determining an amount of dispersion along said length of said fiber optic transmission line based on the messages transmitted at the adjusted lower data rate; and (e) a processor that automatically compensates for the amount of dispersion along said length of said transmission line based on said returned second message.