试题详情
- 多项选择题 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?（） (Choose two.)
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)
- A,B
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