在电信业迅猛发展的今天，新兴电信业务层出不穷，中国的电信市场呈现出多家经营、相互竞争的局面。中国电信、中国联通、中国吉通、中国网通等公司纷纷推出ＩＰ电话卡，这种利用ＩＰ技术向用户提供的密码记账电话业务，以话费低廉、使用灵活而深受广大消费者青睐。特别是随着 In today’s rapid development of telecommunications industry, emerging telecommunications services emerge in an endless stream and China’s telecommunications market shows a number of operating and competing situations. China Telecom, China Unicom, China Jitong, China Netcom and other companies have introduced IP phone cards, this use of IP technology to provide users with the password accounting phone business, in order to cheap calls, the use of flexible and favored by the vast number of consumers. Especially with it