A method and corresponding apparatus for diagnosing problems on a time division multiple access (TDMA) optical distribution network (ODN) is provided. An example method may include: (i) measuring no-input signal power level on a communications path configured to carry upstream communications between...http://www.google.co.uk/patents/US8095002?utm_source=gb-gplus-sharePatent US8095002 - Method and apparatus for diagnosing problems on a time division multiple network access (TDMA) optical distribution network (ODN)
