OptiFiber Pro custom test limit

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Introduction

It is our opinion that the lenght/loss limits specified in ISO/IEC 18011:2010 are not longer adequate to evaluate the quality of a recently installed fiber optic link; they are too relaxed.

Solution

We recommend the use of this custom limit for OTDR event evaluation. End-users could set Maximum Length and Maximum Overall Loss in accordance with the application limit.  For example, if the link is OM3 multimode fiber and the application is IEEE 10GBASE-SR, these values would be respectively 300 m and 2.6 dB (@ 850 nm). More context will be given during the Certified Cabling Test Training module VERSIVOTDR.

Maximum length

Parameter Default value Recommended value
Length (m) N/A N/A (*)

 

Limits for 850 nm

Parameter Default value Recommended value
Connector Loss (dB) 0,75 0,30
Splice Loss (dB) 0,30 0,15
Reflectance (dB) -35,0 -35,0
Overall Loss (dB) N/A N/A (*)
Overall ORL (dB) N/A N/A
Segment Attenuation Coefficient (dB/km) N/A 3,00

 

Limits for 1300 nm

Parameter Default value Recommended value
Connector Loss (dB) 0,75 0,30
Splice Loss (dB) 0,30 0,15
Reflectance (dB) -35,0 -35,0
Overall Loss (dB) N/A N/A (*)
Overall ORL (dB) N/A N/A
Segment Attenuation Coefficient (dB/km) N/A 1,50

 

Limits for 1310 nm

Parameter Default value Recommended value
Connector Loss (dB) 0,75 0,30
Splice Loss (dB) 0,30 0,15
Reflectance (dB) -45,0 -45,0
Overall Loss (dB) N/A N/A (*)
Overall ORL (dB) N/A N/A
Segment Attenuation Coefficient (dB/km) N/A 1,00

 

Limits for 1550 nm

Parameter Default value Recommended value
Connector Loss (dB) 0,75 0,30
Splice Loss (dB) 0,30 0,15
Reflectance (dB) -45,0 -45,0
Overall Loss (dB) N/A N/A (*)
Overall ORL (dB) N/A N/A
Segment Attenuation Coefficient (dB/km) N/A 1,00

 

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