Makasitomala ena sangathe kutsimikiza kuti ndi mtundu wanji wa fiber multimode omwe ayenera kusankha. M'munsimu muli tsatanetsatane wa mitundu yosiyana siyana kuti muwerenge.
Pali magulu osiyanasiyana a zingwe zamagalasi a multimode multimode fiber, kuphatikiza zingwe za OM1, OM2, OM3 ndi OM4 (OM imayimira ma multimode optical multimode).
OM1 imatchula chingwe cha 62.5-micron ndipo OM2 imatchula chingwe cha 50-micron. Izi zimagwiritsidwa ntchito m'malo ogwiritsira ntchito maukonde amfupi a 1Gb/s. Koma chingwe cha OM1 ndi OM2 sizoyenera ma netiweki amasiku ano othamanga kwambiri.
OM3 ndi OM4 onse ndi laser-optimized multimode fiber (LOMMF) ndipo adapangidwa kuti azitha kulumikizana mwachangu ndi fiber optic network monga 10, 40, ndi 100 Gbps. Onsewa adapangidwa kuti azigwiritsidwa ntchito ndi 850-nm VCSELS (ma lasers of cavity surface-emitting lasers) ndipo ali ndi ma sheath a m'madzi.
OM3 imatchula chingwe cha 850-nm chokongoletsedwa ndi laser cha 50-micron chokhala ndi modal bandwidth (EMB) ya 2000 MHz/km. Itha kuthandizira mtunda wa 10-Gbps ulalo mpaka 300 metres. OM4 imatchula chingwe chapamwamba cha 850-nm laser-chokongoletsedwa ndi 50-micron chogwira ntchito cha 4700 MHz/km. Itha kuthandizira mtunda wa 10-Gbps ulalo wa 550 metres. Kutalika kwa 100 Gbps ndi 100 metres ndi 150 metres, motsatana.
