电话业务,以前使用者只求能可靠而不间断地完成双向通话:收费不要太昂贵。电话机传统上总是安装于某个固定位置,那时人们把到这些固定位置去打电话视为天经地义。但这样的概念已为移动电话的发展而有所改变。随着技术经济的发展;交通工具的发达;人类社会交流活动的增加,人 Telephone service, formerly users only want to be able to complete two-way conversation reliably and uninterrupted: the charge should not be too expensive. Traditionally, telephones have always been installed in a fixed location, when people call these fixed locations for granted. But such concepts have changed for the development of mobile phones. With the development of technology and economy, the development of transport facilities, the increase of human social exchange activities, people