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Spirent KB Article
Doc ID: FAQ18242
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Lumos T&D: Why am I not able to select the MEF-48 / Y1564 options?
Lumos T&D: 11.000 and higher.
The correct licensed options must be enabled on the system. Minimum license required:
Lumos T&D: MEF 48 SAT Test(PN: 7750-MEF-48-SAT-xx)
Other licensed options may be required.
User must have "Ethernet Active Tester" ability in their User Group.
User must have "Allow Y.1564/ MEF 48 Testing" ability in ther User Transmission Limits.
Product : VW Controller T&D Classic