美国电话回叫技术的发展

The Development of Callback in U.S.A

本文介绍了电话回叫技术的起因、运作方式和发展情况,分析了这种技术对国际长途电话业务带来的影响,并举例说明了一些国家就此采取的相关策略。

The paper describes the cause, operating procedures and development of callback technology in U.S.A. analyzes its impact on international toll telephone services, and exemplifies the relevant strategies adopted in some countries.