A sequence of binary digits including data and call control signals that is switched as a composite whole. The data, call control signals, and possibly error control information, are arra nged in a specific format.

 
  • 一种包括数据和呼叫控制信号的二进制数字的序列,它是作为一个整体进行交换和传送的。其中数据、呼叫控制信号以及可能有的差错控制信息按照规定的格式进行安排。
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