论文部分内容阅读
从1995年2月IP电话第一次作为Internet上的应用出现以来，在五年多的时间里其技术已取得长足的发展，其应用也受到普遍认可，尤其是网关的出现，使得人们拨打IP电话变得十分方便。我国自1999年第二季度起开展IP电话的商用试验。中国电信、中国联通、中国吉通和中国网通均取得令
Since its first appearance as an Internet application in February 1995, IP telephony has made great strides in more than five years of its technology and its applications are also widely accepted, especially with the advent of gateways that make people dial IP The phone becomes very convenient. Since the second quarter of 1999, China has started commercial trials of IP telephony. China Telecom, China Unicom, China Jitong and China Netcom have made