| 摘要 |
PCT No. PCT/GB95/01918 Sec. 371 Date Aug. 22, 1997 Sec. 102(e) Date Aug. 22, 1997 PCT Filed Aug. 15, 1995 PCT Pub. No. WO96/05665 PCT Pub. Date Feb. 22, 1996An optical transmission system comprises a transmitter and a receiver linked by an optical path having amplifier stations and incorporating a reflectometer for determining the location of an optical fault in the path. Transmitted signals are tapped from the path at an amplifier station and are processed by a correlation technique to detect the relative timing of reflections from a fault and thereby to determine the location of that fault. |
