Basic knowledge of walkie-talkies

What are the main applications of walkie-talkies?

The walkie-talkie is mainly used in public security, civil aviation, transportation, water conservancy, railway, manufacturing, construction, service and other industries. It is used for liaison and command and dispatch among group members to improve communication efficiency and improve the ability to respond quickly to emergencies. With the entry of walkie-talkies into the civilian market, people have begun to use walkie-talkies more and more when traveling and shopping.

Why do people still choose to use walkie-talkies when mobile phones are very popular today?

This is because walkie-talkies have many differences compared to mobile phones:

1. The walkie-talkie is not restricted by the network, and the walkie-talkie allows users to communicate easily in places not covered by the network;

2. The walkie-talkie provides one-to-one and one-to-many communication methods. One-touch talk, simple operation and freer communication, especially in the case of emergency dispatch and collective collaborative work, these features are very important;

3. The call cost is low.

How far is the walkie-talkie?

The call distance of a conventional walkie-talkie is generally 3 to 5 kilometers, but when there are tall buildings or mountains blocking the call distance, the call distance will be relatively short. When there is network support, the talk range of the walkie-talkie can reach tens of kilometers.

Can mass consumers buy walkie-talkies?

Mass consumers can also buy walkie-talkies, but before the purchase and use of walkie-talkies, they had to apply to the local Radio Regulatory Commission (referred to as "No Commission"), obtain a radio station license and pay a frequency occupancy fee. Since December 6, 2001, my country has opened up the civil walkie-talkie market, using 400MHz and civil walkie-talkies with a transmit power of less than 0.5 watts without any formalities.

Can the walkie-talkie make calls?

With network support, the walkie-talkie can be used to make calls. However, if it is just a regular call between single machines, the function of making a phone call cannot be realized.

Is there a charge to use the walkie-talkie?

There is no charge for calling with a regular walkie-talkie. No matter how frequently you use it, you only need to pay a frequency occupancy fee of several tens of yuan for each walkie-talkie every year. If you use a public walkie-talkie, you don't need to pay any fees.

What is a public walkie-talkie?

A public walkie-talkie refers to a wireless walkie-talkie whose transmission power is not greater than 0.5W and works at a specified frequency. Its radio frequency and power and other radio frequency technical indicators must meet the following requirements:

1, the working frequency (.9000; 409. Unit: MHz): 409.7500, 409.7625, 409.7750, 409.7875, 409.8000, 409.8125, 409.8250,409.8375, 409.8500, 409.8625, 409.8750, 409.8875, 4099125, 409.9250, 409.9375, 409.9500, 409.9625,409.9750 , 409.9875;

2. Modulation mode: F3E;

3. Effective transmit power (EIRP): < 0.5W;

4. Transmit frequency tolerance: <+5ppm;

5. Transmitter stray radiation:<50uW;

6. Receiver stray radiation:<20nW;

7. Channel spacing: 12.50kHz.

Why is there a frequency limit for using the walkie-talkie?

In order to ensure that most users' calls are not disturbed and the frequency resources are used reasonably, the Radio Station Management Committee has divided the use of frequencies and stipulated that different industries use corresponding frequency ranges. When a user buys a walkie-talkie, he should apply for a frequency point to the local Radio Regulatory Commission.