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單項(xiàng)選擇題

The ZXMP M900 is applicable to ultra long-haul transmission and the system reach can be up to （） at the maximum 。

A.640km
B.2000km
C.560km
D.800km

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單項(xiàng)選擇題

In a ZXMP M800 system using 100M monitoring, the order-wire and protection switching commands are delivered to related network elements of multicast groups. Each system has a maximum of （） multicast groups.

A.1
B.2
C.3
D.4

ZXWM M900密集波分復(fù)用光傳輸系統(tǒng)中采用的超長(zhǎng)距放大技術(shù)包括大功率（）技術(shù)和（）放大器技術(shù)

答案： EDFA；RAMAN

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