Patent ID: 6483903
Filing Date: 2002-11-19
Classification: H04L

Abstract:
A splitterless system for providing along a subscriber loop, full Ethernet wire speed data transmission between a data source and an Ethernet standard end device, wherein said system includes:a gateway modem device connected to the data source, and arranged in splitterless contact with a subscriber loop extending between a Punch Down Block (PDB), and the Ethernet standard end device; and a user modem device connected between the Ethernet standard end device and the subscriber loop so as to define with said gateway modem device a subscriber loop segment, wherein said gateway modem device and said user modem device are operative to communicate along the loop segment in different predetermined, first and second frequency spectra, for uplinking and downlinking, respectively, thus to facilitate therealong full Ethernet wire speed data transmission therealong, and wherein said user modem includes:apparatus for preventing entry into said user modem of ringing voltages of analog/voice devices, and apparatus for preventing entry into said user modem of switching voltages, thereby to prevent loss of locking between said user modem and said gateway modem, which includes: apparatus for detecting the presence of switching voltages on the loop segment, and for providing an output signal indicative of the presence thereof; a normally closed switch circuit for selectably isolating said user modem from the loop segment; and a timer associated with said apparatus for detecting the presence of switching voltages and with said switch circuit, operative, upon receiving said output signal, to move said switch circuit into an open circuit position for a period of time predetermined to be greater than the time period during which the switching voltages exist on the loop segment, but less than that which would cause a loss of locking between said user modem and said gateway modem.