The problem is that there's no such thing as an international telephone network.
现在的问题是没有一个国际电话网络。
With its international service, UPS can reach over four billion people, twice the number of people who can be reached by any telephone network.
由于它的国际业务，UPS可为超过四十亿人提供服务，是所有电话网路所及人数的两倍。
Although our telephone business has reached international competitive standard, we will still be kept on perfecting it, providing businesses such as virtual private communication network and discount.
虽然我们的电话业务已达到国际竞争水准，但我们仍将继续对其进行改善，提供诸如虚拟专用通信网和折扣业务等。
Definition of: ISDN (Integrated Services digital Network) an international standard for switched, digital dial-up telephone service for voice and data.
定义：ISDN(综合服务数字网络)，是一个国际转换标准，是为了语音和数据的数码拨号上网电话服务。
Definition of: ISDN (Integrated Services digital Network) an international standard for switched, digital dial-up telephone service for voice and data.
定义：ISDN(综合服务数字网络)，是一个国际转换标准，是为了语音和数据的数码拨号上网电话服务。
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