Telefonaktiebolaget Lm Ericsson (publ)

Francesco Cisamolo

Roberto Magri

Riccardo Ceccatelli

Stefano Orsi

An indicator system () for optical ports () of a passive optical communications equipment (). The indicator system comprises a plurality of photodetectors () configured to detect an optical signal on the optical ports and a plurality of () configured to indicate on which optical ports an optical signal is detected by the photodetector. The indicator system further comprises a power source () configured to provide power to the photodetectors () and indicators (). The power source is self-contained at the passive optical communications equipment. The power source () comprises a mechanical to electrical converter ().

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Genoa, Italy

Francesco Cisamolo