EXFO America Inc. OTN-INTR-THRU **FLEX compatible**Enables OTN intrusive through mode functionality - Available for FTB/IQS-8120NGE / 8130NGE. - Available for FTB/IQS-8120NGE-FLEX / 8130NGE-FLEX(Operates only in a FTB-400, IQS-500 or IQS-600 platform)