一种能够限制电话费支出的新产品──微电脑电话号码限拨器最近由山东青岛凌立电器有限公司研制成功。该产品采用微电脑集成控制芯片，体积仅为烟盒大小，能代替接线盒直接安装在电话引线上，并锁在抽屉中，不影响话机一切功能。其最为显著的特点是：编制程序完全通过话机键盘? A new product that can limit phone bill spending ─ ─ microcomputer telephone number limiter recently developed by Shandong Lingling Electric Co., Ltd. The product uses microcomputer integrated control chip, the volume is only the size of the cigarette case, can be installed directly on the phone leads instead of the junction box, and locked in the drawer, does not affect all the features of the phone. Its most significant feature is: programming completely through the phone keyboard?