These values are encapsulated in a digital signature of 76 bytes per frame.
这些数值被压缩入每画面76字节的数字签名中。
In other words, parity bytes monitor and detect errors over different parts of a SONET frame.
换句话说，校验字节的监测和检测过的SONET帧的不同部分中的错误。
Each frame is wrapped in a packet, which affixes several bytes of information used in establishing the connection and marking where the frame starts.
每一帧是包在一个包，黏贴几个字节的信息用于建立连接和标记帧开始的地方。
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