Qhov 1*9 ntimkho qhov muag modulecov khoom yog thawj zaug tsim nyob rau hauv 1999. Nws yog ib tug fixed optical module khoom.Nws yog feem ntau ncaj qha kho (soldered) ntawm lub rooj tsav xwm Circuit Court ntawm cov khoom siv sib txuas lus thiab siv los ua ib qho kho qhov muag module.Qee zaum nws tseem hu ua 9-pin lossis 9PIN optical module..

Raws li lub npe implies, no fiber optic module muaj cuaj tus PINs,uas yog daim ntawv ntim ntau tshaj plaws ntawm cov khoom siv kho qhov muag thaum ntxov, thiab tseem yog ib hom nrog kev lag luam loj heev.Multimode converters thiab qee qhov chaw tswj kev lag luam.Yooj yim muab tso, 1 × 9 optical module yog cov khoom siv sib txuas lus uas siv lub teeb nthwv dej raws li cov neeg nqa khoom nthwv dej thiab cov khoom siv kho qhov muag ua qhov nruab nrab kis.Nws siv lub teeb pom kev zoo los hloov cov teeb liab hluav taws xob rau hauv cov teeb liab kho qhov muag, uas yog cov tswv yim rau cov khoom siv fiber ntau rau kev sib kis.Lub teeb liab yog amplified, zoo li tus thiab regenerated los kho qhov qub hluav taws xob teeb liab.