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FAQs 什么是差分时钟恢复(DCR)?
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    • CES PW净荷与SAT PW净荷的主要区别是什么?
    • PW用于什么样的AAL1 (ATM适配层1)?
    • TDM PW是否可用于实现电信DS0交叉连接?
    • 为什么有多种PW报头字节(MEF-8、MPLS、UDP/IP、L2TPv3、IPv4和IPv6)?
    • 什么是OAM时标?
    • 什么是TDM伪线(PW)?
    • 什么是实时协议(RTP)时标?
    • 什么是差分时钟恢复(DCR)?
    • 什么是本地时标?
    • 什么是自适应时钟恢复(ACR)?
    • 净荷中应包含多少字节?
    • 时分复用(TDM) PW定时是什么意思?
    • 运营、管理和维护(OAM)意味着什么?
    • 高级数据链路控制(HDLC)必须怎样处理TDMoP?
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  • 使用AD936X Evaluation Software导出配置时,软件提示滤波器系数过多。

什么是差分时钟恢复(DCR)?

DCR中的时钟恢复算法采用实时传输协议(RTP)时标。发送侧采用高精度时钟产生时标,识别每个数据包的发送时间。接收侧必须能访问相同/共用时钟(频率,例如GPS定时),并利用每次接收到的RTP时标之间的时间差复现T1/E1定时。共用时钟基准可供几乎每个公共网络节点上的公共网络设备使用。DCR定时恢复主要受共用时钟精度的影响。只要共用时钟是高精度源(例如Stratum 3时钟),DCR就能提供比自适应时钟恢复(ACR)更好的定时恢复。
Tags: DS34T101GN+ 000101435
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