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今天,电话在我国已逐渐普及。无论是单位用户,还是家庭用户,电话月租费的支出总有一个计划。为减少不必要的开支和防止他人盗用或滥用电话,许多用户安装了电话密码锁。市售电话密码锁一般通过电话机键盘输入密码,极易泄密,故需经常更换密码,使用起来不太方便。本文介绍一种采用新的编码技术的红外电话密码锁。它具有保密性强、使用方便的特点。
Today, the telephone has been gradually popularized in our country. Whether it is a unit user or a home user, there is always a plan for monthly telephone charges. To reduce unnecessary expenses and prevent others from misappropriating or misusing telephone numbers, many users have installed a telephone code lock. Generally speaking, the lock of a commercially available telephone password is entered through the keypad of the telephone, which can easily leak the password. Therefore, the password needs to be changed frequently to make it inconvenient to use. This article describes an infrared code lock using the new encoding technology. It has the characteristics of strong confidentiality, easy to use.