调制解调器是网络系统的必要产品，由于网张听大力发展，调制解调器市场将在今后四年中，得到快速的发展。然而，以ISDN和其他技术形式所提供的速度更快的传输服务也将会抑制人们对调制解调器的需求。由于用户与公共资源的连接需求不断增加，Internet对调制解调器的销售产生的 Modem is a necessary product of the network system. Due to the vigorous development of the network, the modem market will be rapidly developed in the next four years. However, the faster transport services offered in ISDN and other technologies will also dampen the need for modems. Due to the increasing demand from users for connection to public resources, the Internet has generated sales of modems