| 摘要 |
Optical access nodes ( 1 ) comprising optical line terminations ( 31,32 ) and comprising optical components ( 41,42 ) coupled to the optical line terminations ( 31,32 ) are provided with switching means ( 50 - 52 ) for coupling a redundant optical line termination ( 60 ) to the optical components ( 41,42 ). This redundant optical line termination ( 60 ) forms a substitute for at least one of the optical line terminations ( 31,32 ). As a result, it is no longer necessary to have a working part and a standby part in each optical line termination ( 31,32 ), and the optical access node ( 1 ) according to the invention has got an increased efficiency in terms of costs and volume. The normal optical line terminations ( 31,32 ) are low split line terminations and the redundant optical line termination ( 60 ) is a high split line termination which is enabled to support a higher physical split ratio and reach thanks to a higher optical budget compared to the low split line termination and for example compensates for losses caused by the switching means.
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