... & Requirement PC(SM)UPC(SM)APC(SM)PC(MM)Insertion Loss (Typical)dB≤0.3≤0.2≤0 ... .2≤0.3Return LossdB≥45≥50≥60≥35Mechanical Endurance (500T)dB≤0.2ExchangeabilitydB≤0.2DurabilityTime1000VibrationdB ... APC3, Core Type: Single-mode (SM: 9/125um), Multimode (MM: 50/125um or 62.5/125um)4, Cable Quantity: “2C” means ... type: PVC, LSZH, OM3, OFNR, OFNP, Plenum SM/MM UPC Fiber Optic Patch Cord