| 摘要 |
The invention relates to a Method for monitoring an optical data transmission line, in particular an optical subscriber access line, in which to a data signal to be transmitted and having a constant amplitude a measuring signal is superimposed and in which a resulting answering signal is evaluated for monitoring, wherein the superimposed measuring signal is a digital signal, the spectral properties of which are adapted to a respective measuring task by choosing a suitable bit sequence as well as to an optical data transmitter, an optical data receiver, and an optical data station.
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