Internet网络的发展,使人们的通讯、联系方法发生了巨大的变化。网络电话的诞生,使远在千里之外的亲友们,能够通过计算机进行即时的交流,而E—mail则更是大大方便了人们之间的联络。但由于国内网络的带宽有限,网络电话的通话质量不是非常好,经常有停顿、断音的现象。E—mail虽然可以 The development of the Internet has brought about tremendous changes in people’s communication and contact methods. The birth of the Internet phone, so that friends and relatives thousands of miles away, through the computer for instant communication, and E-mail is even more greatly facilitate the contact between people. However, due to the limited bandwidth of the domestic network, VoIP calls quality is not very good, often pause, tone phenomenon. E-mail though