1. Imagwiritsa ntchito kapangidwe kotseka madzi ouma popanda mafuta odzaza. Ndi yoyera komanso yachangu panthawi yomanga ndipo siikhudza chilengedwe chozungulira.
2. Kuchuluka kwa ulusi wowala kwambiri, kuchuluka kwa ma cores ndi malo ochepa
3. Filimu yayitali yokhala ndi mbali ziwiri yokutidwa ndi tepi yachitsulo yozungulira komanso chidendene cha zigawo ziwiri zimathandiza kuti chingwe chowunikira chisagwedezeke bwino
Chingwe chowunikira chikachotsedwa, zimakhala zosavuta kutsegula skylight. Chili ndi mwayi waukulu wogwiritsa ntchito pa netiweki yolumikizira (makamaka FTTX) ndi pakati pa maofesi.