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现今的电话业务是电话公司通过公共交换电话网提供的。但是,随着网络技术的发展,语音信号可以通过各种网络,包括国际互联网、局域网、广域网、企业内部网、帧中继网、有线电视等来传输,这使得电话业务出现了一些新的发展趋势,其主要特点就是越来越多的电话将与电话公司无关。国际互联网电话 1995年2月以色列VcoalTec公司的美国分公司率先推出了国际互联网络电话软件。这个软件提供了交互式语音在
Today’s telephone service is provided by telephone companies over the public switched telephone network. However, with the development of network technology, voice signals can be transmitted through various networks, including the Internet, local area network, wide area network, intranet, frame relay network and cable television, which bring about some new developments in the telephone service The main feature of the trend is that more and more phones will have nothing to do with the phone company. Internet Phones February 1995 The U.S. subsidiary of Israeli VcoalTec Corporation pioneered Internet telephony software. This software provides interactive voice over