IP电话是采用互联网技术实现的新一代长途电话业务。由于采用了新的技术,以及IP电话网的建设成本较传统电信网大为降低,因此,IP电话的费用也比传统长话大大降低。 人们最早接触到的IP电话服务是以IP卡的方式提供的。在打长话时,先要拨一个IP电话的接入号,再拨十几位的IP卡号和密码,再拨对方区号和号码方能通话,非常繁琐。 随着IP电话应用的不断普及,以及IP电话技术的不断成熟与发展,近一年多来,几大电信运营商纷纷推出了新一代的IP电话业务——IP直拨电话。 IP直拨电话,也有人称之为IP主叫业务,它最大的特点,除了 IP telephony is a new generation of long distance telephone services that uses Internet technology. As a result of adopting new technology, and the construction cost of IP telephone network is greatly reduced than the traditional telecommunication network, the cost of IP telephone is greatly reduced than the traditional long-distance talk. The earliest people to come into contact with the IP phone service is provided by means of IP cards. When playing a long speech, first dial an IP phone access number, then dial a dozen IP card number and password, and then dialed the other area code and number before calling, very cumbersome. With the continuous popularization of IP telephony applications and the constant maturity and development of IP telephony technologies, several major telecom operators have launched a new generation of IP telephony business, the IP direct dial phone, in the past year or so. IP direct dial telephone, also called IP calling business, its biggest characteristic, besides