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Which of the following conditions will not trigger GPON Type B single-homing protection switching?

Which of the following conditions will not trigger GPON Type B single-homing protection switching?
A . Multiple ONU are attached to the optical splitter, and a single ONU is offline
B . Trunk fiber break
C . OLT active PO port fault
D . Deterioration of trunk optical cable line quality

Answer: A

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