Optical Fibre Connector Grade:

‘Grade C’:

  • Loss: 0.25dB mean, ≤0.50dB max, >97% of samples

  • Return Loss: ≥35dB

‘Grade B’:

  • Loss: 0.12dB mean, ≤0.25dB max, for >97% of samples.

  • Return Loss: ≥45dB

‘Grade A’ connector performance (to be officially ratified by IEC):

  • Loss: 0.07dB mean, ≤0.15dB max, for >97% of samples.

  • Return Loss by IEC 61300-3-6 Random Mated: >55dB (unmated, for APC connectors) and >60dB (mated)

Patch Cable Colour Coding

  • G.657A1 fibre, 10 mm bending radius

  • G.657A2 & B2 fibre, 7.5 mm bending radius

  • G.657B3 fibre, 5 mm bending radius

  • Compliant with ITU-T G.652.D fibres

  • At 650nm red light, the attenuation is ~6.5dB/km for single mode fibre.

  • The human eye visibility at 650nm could reach -50dBm.

  • The 10mW 650nm Visual Fault Locator (VFL) could reach 9km.