性能卓著的超级电话锁承建通信事业迅速发展的今天，国内、国际长途直拨电话四通八达，市内、郊县电话更是日益普及，１６０、ｉ６８信息台及其它特种服务台层出不穷，给广大电话涓户带来了极大的方便和欢乐。但对企事业单位来说，如何合理控制电话费的支出已成为一个难题... The outstanding performance of the super phone lock The rapid development of today’s communications construction undertakings, domestic and international direct dial telephone in all directions, city, suburban telephone is more and more popular, 160, i68 information desk and other special service station after another, to the majority of telephone calls Brought great convenience and joy. But for enterprises and public institutions, how to control the expenditure of phone bills has become a problem ...