| 摘要 |
In an optical network that communicates upstream data utilizing a time division multiple access (TDMA) technique, end nodes transmit upstream data on a first wavelength in accordance with a transmission sequence. The end nodes transmit a timing signal on a second wavelength following the upstream data. The timing signals are reflected by a wavelength selective reflective elemen t to each of the end nodes. The end nodes track the timing signals to determin e when to transmit upstream data in accordance with the transmission sequence. The optical network includes an outside plant node coupled to the system hea d end with a distribution fiber. The outside plant node is coupled to the end nodes with drop fibers. The outside plant node includes a splitter/combiner and the wavelength selective reflective element. The wavelength selective reflective element reflects the timing signals on the second wavelength and passes upstream and downstream data on other wavelengths.
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