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随着电话普及率的提高,电话已进入许多家庭。为了降低电话费用,许多人都想使自己的电话机具有限拨功能。现介绍一种不花一分钱(或只花买一个开关的钱)就能使普通电话机具有限拨功能。在电话机电路板上,将拨号集成块供电脚的引线用刀片划断,然后再加装一只拨动
As the popularity of telephones has increased, telephones have entered many families. To reduce the cost of calling, many people want to make their phones have limited dialing capabilities. Now introduce a do not spend a penny (or only buy a switch to the money) can make ordinary telephone with limited dialing function. In the telephone circuit board, dial the integrated block power supply pin with a blade cut, and then install a dial