问题
单项选择题
光纤接入网中，OLT的核心功能块不包括哪个（）功能。
A．ODN接口功能
B．传输复用功能
C．数字交叉连接功能
D．OAM功能
答案
参考答案：D
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光纤接入网中，OLT的核心功能块不包括哪个（）功能。
A．ODN接口功能
B．传输复用功能
C．数字交叉连接功能
D．OAM功能
参考答案：D
| 完形填空。 | |||
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