Fiber Optic Loop Back Cable MM62.5/125um,MTRJ.
Features:
l         Insertion Loss 
<=0.3dB(Max.)----SM
<=0.5dB(Max.)----MM
l         Return Loss >=45dB (PC 
Polishing)
                                >=55dB 
(UPC Polishing)
                                
>=60dB (APC Polishing)
l         Durability (500 matings):<=0.2dB 
increase(Max.)
l         Operating 
temperature:-20oC~+75oC.
l         Storage 
temperature:-40oC~+75oC.
l         All our patch cords are 100% 
tested!