问题:
Click the Exhibit button. The exhibit shows a 15454/15216 DWDM system and alarm indications.
What are two possible sources of trouble shown in the system?()
A . fiber failure between Sites A and D
B . EDFA failure at Site A (clockwise direction)
C . EDFA failure at Site C (clockwise direction)
D . 15216 multiplexer at Site A (counter-clockwise direction)
E . OADM pass-through (West "OUT") failure at site D (clockwise)
F . wavelengths 1 and 3 transmitter failures at Site A (clockwise direction)
Click the Exhibit button. The exhibit shows a 15454/15216 DWDM system and alarm indications.
What are two possible sources of trouble shown in the system?()
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