磁卡电话作为高科技产品目前在全国如雨后春笋发展很快。它使用方便,计费准确,维护便捷,深受广大消费者喜爱。 作为新产品在使用中不免也会出现一些问题或故障。我局1993年3月份在纵横制交换机时给邮电营业室安装过二台天津磁卡电话厂生产的磁卡电话,计费准确,工作正常。同年11月份我市局更换为上海贝尔公司的S1240程控交换机,通过给磁卡电话机送反极性,重新给磁卡电话机作初始化设定,而 Magcard phone as a high-tech products are now springing up rapidly throughout the country. It is easy to use, accurate billing, easy maintenance, loved by the vast number of consumers. As a new product in use can not help but also have some problems or failures. In March 1993, our bureau installed two magnetic-phone cards produced by Tianjin Magcard Telephone Factory to the post and telecommunications business offices during the cross-exchange system. The charges were accurate and the operation was normal. In November of the same year, the municipal bureau was replaced by Shanghai Bell’s S1240 program-controlled switchboard. By sending reverse polarity to the magnetic card telephone and re-setting the magnetic card telephone,