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？（）
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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