DDM (Digital Diagnostic Monitoring) ndi teknoloji yomwe imagwiritsidwa ntchito mu ma modules optical.Amagwiritsidwa ntchito pozindikira momwe ma module opangira amagwirira ntchito.Ndi nthawi yeniyeni yowunikira njira za ma module optical.Amalola ogwiritsa ntchito kuyang'anira magawo a ma module optical mu nthawi yeniyeni, kuphatikizapo analandira mphamvu ya kuwala, magetsi opatsirana, kutentha kwa ntchito, magetsi opangira magetsi ndi laser bias panopa.Kenaka, yerekezerani mtengo wowunikira ndi mtengo wamtengo wapatali womwe umafunidwa ndi optical module pansi pazikhalidwe zogwirira ntchito.Ngati sichili m'gawo lofunikira, alamu idzaperekedwa.Ngati mawonekedwe owoneka bwino akuwonetsedwa kuti ali pachiwopsezo, chosinthiracho chidzasiya kutumiza deta, ndipo sichidzatumiza kapena kulandira deta kachiwiri mpaka mawonekedwe a optical ali mu chikhalidwe chabwino.
Optical module DDM imagwira ntchito molingana ndi miyezo yokhazikika yomwe imatanthauzidwa ndi protocol ya SFF-8472.Protocol ya SFF-8472 imatchulanso milingo kapena magawo omwe amatsatiridwa ndi mapulogalamu ndi zida zama module owoneka bwino ndi zida zapaintaneti (monga masiwichi), kuwonetsetsa kugwirizana kwazinthu zomwe zimaperekedwa ndi ogulitsa zida zapaintaneti zosiyanasiyana ndi othandizira ma module opangira.Mwachidule, magawo ambiri a OAM amatha kugawidwa ndi makampani onse olankhulana.Ndikoyenera kudziwa kuti kulondola kwazinthu zina kwadutsa zofunikira za mgwirizano.Gome lotsatirali likuwonetsa miyezo ya SFF-8472 protocol yama module owoneka.
