I-DDM (I-Digital Diagnostic Monitoring) ubuchwepheshe obusetshenziswa kumamojula optical. Isetshenziselwa ukuxilonga isimo sokusebenza samamojula optical. Kuyindlela yokuqapha ipharamitha yesikhathi sangempela yamamojula optical. Ivumela abasebenzisi ukuthi baqaphe amapharamitha amamojula optical ngesikhathi sangempela, okuhlanganisa amandla optical atholiwe, amandla optical adlulisiwe, izinga lokushisa lokusebenza, amandla kagesi kagesi kanye ne-laser bias current. Bese, uqhathanise inani eligadiwe nebanga levelu elidingwa imojuli yokubona ngaphansi kwezimo ezijwayelekile zokusebenza. Uma ingekho phakathi kwebanga elidingekayo, kuzonikezwa i-alamu. Uma imojuli ye-optical ibonakala isesimweni esibi, ishintshaizoyeka ukuthumela idatha, futhi ngeke iphinde ithumele noma yamukele idatha kuze kube yilapho imojula yokubona iba sesimweni esivamile.
Imojula yokubona i-DDM isebenza ngokususelwe kumanani epharamitha ajwayelekile achazwe yiphrothokholi ye-SFF-8472. Iphrothokholi ye-SFF-8472 icacisa amanani epharamitha ajwayelekile noma ububanzi okufanele bulandelwe isofthiwe nehardware yamamojula abonakalayo namadivayisi enethiwekhi (njengamaswishi), iqinisekisa ukusebenzisana kwemikhiqizo ehlinzekwa abahlinzeki bezinto zenethiwekhi abahlukene nabaphakeli bemojula yokubona. Ngamafuphi, isethi yemingcele evamile ye-OAM ingabiwa yiyo yonke imboni yezokuxhumana. Kuyaphawuleka ukuthi ukunemba kweminye imikhiqizo kudlule izidingo zesivumelwano. Ithebula elilandelayo libonisa amazinga epharamitha ephrothokholi ye-SFF-8472 yamamojula abonakalayo.
