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【单选题】
GPON系统中,OLT通过___管理维护通道对终端设备进行配置和维护
A. OMCI
B. OAM
C. TR069
D. SNMP
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答案
A
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在SDH网中既有标准的电接口,又有标准的___便于不同厂家设备的互通
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STM-N的复用方式是___
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PTN网络中,时间同步主要有两种方式:___方式和( )方式其中( )方式又分为点到点和端到端2种类型。
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下列哪和一项不是PTN技术的特点___
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IP Over SDH 与 IP Over ATM 比较,以下说法错误的是___
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SDH传送网分层模型中包括 电路层 、 通道层 、 ___ 等三层。
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传输设备光口输出的STM-N信号是经过加扰的,扰码的范围是___
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