Patent ID: 7548549
Filing Date: 2009-06-16
Classification: H04L

Abstract:
1. A method for transmitting forward and backward sequences of Ethernet packets, each sequence coded to be suitable for uni-directional transmission over a physical medium, between a first and a second Ethernet interface over a single coaxial cable, the method comprising the steps of: (a) forming a backward signal from the backward coded sequence of packets at the first Ethernet interface for the transmission over the coaxial cable to the second Ethernet interface; (b) forming a forward signal from the forward coded sequence of packets at the second Ethernet interface for the transmission over the coaxial cable to the first Ethernet interface, including providing an asymmetry in frequency or time characteristics between the forward and backward signals to avoid interference between the backward and forward signals and allow the transmission of both signals at the same time; wherein the step (a) comprises coupling the backward coded sequence through a passive device to the coaxial cable; wherein the step (b) comprises the step of: modulating the forward coded sequence into a modulated coded signal having frequency spectrum above that of the backward coded sequence; and coupling the modulated coded signal through a second passive device to the coaxial cable; and wherein the forward and backward coded sequences are 100BaseT signals or 10BaseT signals, the backward coded sequence having a spectrum limited to below about 125 MHz, and the modulated coded signal having a frequency spectrum above about 125 MHz and below about a 1250 MHz.