最初定义为数字蜂窝电话网络的泛欧洲开放式标准，用来支持语音、数据、文本消息和过境漫游。
Originally defined as a pan-European open standard for a digital cellular telephone network to support voice, data, text messaging and cross-border roaming.
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.
固定电话网、移动电话网、分组数据网与因特网的共存与融合需要制定许多标准才能实现。
Coexisting and converging of fixed networks, mobile networks, packet data networks and Internet needs a number of standards.
DECT是欧洲无绳电话的标准，主要用于语音和数据通讯。
DECT is the standard of european cordless telecommunications, and is mainly used in tone and data communction.
这些电话系统将电话机上的按键变成数据录入机构，用于完成标准化的电话送入数据库，如验证一个帐户的收支是否平衡。
These are phone systems where the keypad becomes the data-entry mechanism for performing standardized calls into a database, such as verifying the balance of an account.
这些电话系统将电话机上的按键变成数据录入机构，用于完成标准化的电话送入数据库，如验证一个帐户的收支是否平衡。
These are phone systems where the keypad becomes the data-entry mechanism for performing standardized calls into a database, such as verifying the balance of an account.
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