ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,513,240, issued on Dec. 30, was assigned to BRITISH TELECOMMUNICATIONS PLC (London).
"Detecting modem power state change" was invented by Feiyu Fang (London), Lykourgos Kekempanos (London) and Daniel Gilks (London).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method of determining when there has been a change in the modem power state of a modem connected to a digital subscriber line. An Uncalibrated Echo Response (UER) trace is obtained from the digital subscriber line by running a Single Ended Line Test (SELT) on the line. This UER trace is compared to a historical (baseline) UER trace from the same line. A difference in the two traces in a higher f...