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关于IP电话说法错误的是:( )。[1分]

  • A.IP电话是利用Internet作为传输介质实现计算机与计算机、普通电话与普通电话、计算机与普通电话之间进行语音通信的技术。
  • B.将PSTN网络传来的语音信息压缩打包,经TCP/IP网络传输,完成这项工作的是IP电话的关键设备,称为网闸。
  • C.多点控制单元支持IP网络中网络会议等多点通信
  • D.由于采用了压缩技术,数据速率比传统PSTN低很多
试题出自试卷《2014年通信工程师考试综合能力中级真题》
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