Patent ID: 8270828
Filing Date: 2012-09-18
Classification: G01M,H04B

Abstract:
1. An optical line monitoring apparatus which monitors a failure of optical lines branched from a test apparatus by a splitter and connected to a plurality of terminators, comprising: a first storage device which stores intensities of reflected lights from the plurality of terminators in response to an optical signal emitted from the test apparatus in a state in which a failure is not occurring in the optical lines; a first control device which emits an optical signal, to which a first averaging time and/or a first pulse width are applied, from the test apparatus; a second storage device which stores intensities of-reflected lights from the plurality of terminators in response to the optical signal emitted by the first control device; an attenuation amount determination device which determines whether or not, among the reflected light intensities of the plurality of terminators stored in the second storage device, there is a terminator with a reflected light intensity attenuated compared with the corresponding reflected light intensity which is stored in the first storage device; and a second control device which emits an optical signal, to which a second averaging time and/or a second pulse width are applied, from the test apparatus, if the attenuation amount determination device determines that there is a terminator with an attenuated reflected light intensity.