VIAVI TestCenter: When I disable auto negotiation in fiber optic mode on the CM-1G-D12 or CM-1G-D4, it seems to still be enabled.

Knowledge Base - FAQ

• There is a difference in CM and EDM modules concerning auto-negotiation. • Scenario 1 - DUT auto negotiation off • EDM with auto neg On will indicate link down. • CM with auto neg On will indicate link up. • Scenario 2 - DUT auto negotiation on • EDM with auto neg Off will cause link on DUT to go down. • CM with auto neg Off will keep DUT link up.  
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