近两年，电脑型电话机在国际市场受宠，电子业纷纷掀起投资热潮，转产电脑型电话机。与此同时，国内电话市场也将应求鼎新．普通电话机功能单一、联络区域有限，而电脑型电话机能扬长弃弊，顺应现代需求．如电脑移动电话通信半径可达25km，还可与程控电话联网；电脑卡电话，使 In the past two years, computer-type telephones have been favored in the international market, and the electronics industry has rushed to invest in computerized telephones. At the same time, the domestic telephone market will also seek new ways. The ordinary telephone features a single, limited contact area, and computer-based telephones can take advantage of the advantages and disadvantages, comply with modern needs. Such as computer mobile phone communication radius of up to 25km, but also with program-controlled telephone networking; computer card telephone, so that