OptiFiber Pro custom test limit

Introduction

It is our opinion that the lenght/loss limits specified in ISO/IEC 18011 are not longer adequate to evaluate the quality of a recently installed fiber optic link; they are too relaxed. These values are not applicable when testing links containing MPO connectors.

 

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