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无绳电话主副机通话时不受电话线的限制,在房间任一地方打电话都很方便,是很受用户欢迎的一类话机,尽管价格比较高,仍然有很多用户。但是,早期的无绳电话机同普通电话机相比,存在着许多缺点,最主要一条是通话不保密,易被人偷听、偷打,产生不必要的话费纠纷。为了防止无绳电话被偷听偷打,生产厂家推出了一种主副机间使用保护密码的新型无绳电话机,在使用时,副机会
Cordless phones The main and auxiliary phones are not limited by the telephone line when talking. Calling anywhere in the room is convenient and is a popular type of telephone for users. Despite the relatively high prices, there are still many users. However, compared with ordinary telephone sets, there are many shortcomings in the early cordless telephone sets. The most important one is that the calls are not kept secret and are easily eavesdropped and stolen, resulting in unnecessary bill disputes. In order to prevent the cordless phone from being overheard, the manufacturer introduced a new type of cordless telephone that uses a protection code between the primary and secondary devices. In use,