在电话局一端，ISDN线连到数字交换机。
At the telephone company end, ISDN lines connect to a digital switch.
一旦头脑中有了大体数字，您就需要配置交换空间。
Once you have a figure in mind, you need to configure the swap space.
本文研究的即为适用于电力部门的小型数字程控交换系统。
The small digital programmable exchange system studied in this paper is suitable for electric department.
公平交换即允许双方在因特网上公平地交换数字签名。
Fair exchange means that two parties exchange digital signatures fairly over Internet.
公平交换即允许双方在因特网上公平地交换数字签名。
Fair exchange means that two parties exchange digital signatures fairly over Internet.
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