Certification and testing
TIER 1:
To certify an optical fibre link, the following operations must be carried out:
Link attenuation measurement and evaluation, Link length measurement and evaluation, Link polarity verification
TIER 2:
completed by an analysis of the link with OTDR (trace and/or table of events). The OTDR analysis provides an indication of the uniformity of cable attenuation and the loss associated with each individual connector, each single junction and other events.