What's the use of digital phones?

Telephone has brought convenience to people's lives. However, it sometimes brings you some trouble. Families with telephones may have had this experience: the phone suddenly rings in the middle of the night and a disgusting harassing call bothers you; Sometimes, the phone will be stolen, which will make you suffer economic losses. If you use a digital phone, your above troubles will be alleviated.

The ordinary telephone we usually use converts sound into electrical signals through a microphone. This kind of electrical signal always imitates our voice and changes with the change of voice, so it is called "analog signal". A telephone that transmits analog signals is called an "analog telephone". Analog signals transmitted on telephone lines are constantly disturbed by the outside world. The farther the communication distance, the more noise interference and the more serious the distortion. Using analog phones to make calls has poor security. On the telephone line, as long as you connect a phone, you can know the content of the conversation between the two parties. A digital telephone encodes an analog voice signal into a digital signal. The digital signal here is not a decimal number such as 1, 2, 3, 4, 5, which we usually use, but a binary number represented by 0 or 1. Like telegraph signals, digital signals are irregular and discontinuous electrical pulses. Therefore, the digital phone has anti-theft and safety functions; Moreover, the anti-interference ability of digital signals is particularly strong, which makes voice signals clearer.

Digital telephone has many incomparable advantages over analog telephone, for example, it can send some short text messages to the other party while talking, or connect a computer to surf the Internet. Digital phone has the calling number display function, which can display the other party's phone number on the LCD screen when the incoming call rings. In this way, users can act according to circumstances, not only can take important calls calmly, but also can transfer unimportant calls to voice mail. Digital mobile phones can also be used as electronic notebooks. Users can store 50 ~ 100 phone numbers and names in their mobile phones, or dial directly by name or phone number. Digital telephone is controlled by computer. It will help you automatically store and record incoming and outgoing calls. It also allows the host to set the date and time. It has ten different ringtones to choose from, and can send short messages in Chinese and English to each other. It also has many functions, such as hands-free call, redial number, speed dial, call transfer, three-way call, conference call and so on.

With the digitalization of telephone network, the advantages of digital telephone communication are increasingly prominent. It can be said that more and more people will like digital phones.