Industry application of wireless intercom system
In general hotels and some specific occasions, communication is basically carried out by means of wireless walkie-talkies. The progress of wireless walkie-talkie systems makes people feel fun and convenient. In this article, we will talk about the application scope of wireless walkie-talkies.
1. Communication distance
The general communication distance within 2-3 kilometers can be regarded as short-distance communication. For individual users, civilian walkie-talkies can be purchased. For unit users, a low-power walkie-talkie can be purchased through application. If you want to ensure the communication effect, you can choose a professional conventional walkie-talkie. Need to communicate within the city, the communication distance is within 3-10 kilometers, you can consider buying a professional walkie-talkie. If it is further away, it is best to use the base station to communicate with the handheld walkie-talkie, or the vehicle-mounted radio to communicate with the vehicle-mounted radio. If the user needs a longer distance or better communication quality, they can consider using a cluster walkie-talkie when they do not have a network. Because the trunking walkie-talkie has radio network support, the communication distance is relatively long, and the effective distance reaches 15--30KM. This walkie-talkie needs network support, so once it is disconnected from the network, it is like a mobile phone disconnected from the network. .
2. Transmit power
For radio equipment, the amount of transmit power is critical. For the same wireless device, the price difference between products with high transmission power and products with low transmission power is not small. Not only that, the difference in transmit power also directly affects the data transmission stability of the wireless network. Therefore, paying attention to the transmit power of the selected device is also an important part in the process of selecting a wireless device. At present, for the transmission power of wireless network equipment, some directly mark the power value in the device manual, and some express the transmission power by the distance of the transmission distance. Under normal circumstances, the transmission power of wireless devices should be between 25mW and 50mW, or the transmission distance should be between 50 meters and 200 meters. If you can't find the transmit power value in the device or manual, don't buy it at will.
3. Professional walkie-talkie
Professional walkie-talkie refers to a walkie-talkie with a transmit power of 4-5W and a frequency range of 136-174MHz or 400-480MHz. The communication distance of such walkie-talkies is generally between 3 and 8 kilometers (depending on the specific environment). . It is relatively simple to operate because most professional walkie-talkies have no numeric keypad but only two knobs to control the number of channels and the power and volume switches. The disadvantage of the professional walkie-talkie is that it is relatively large and relatively heavy, but it is more prominent in terms of water resistance, vibration resistance, drop resistance, and anti-aging, and the performance of the walkie-talkie is much more stable. The price of professional walkie-talkies is higher (500-2500 yuan), which is generally used in construction engineering, property management, and factory workshops.
4. Commercial walkie-talkies
Commercial walkie-talkies refer to walkie-talkies with a transmission power of 400-480MHz, and the communication distance of such walkie-talkies is between 800 meters and 8 kilometers (depending on the transmission power of the walkie-talkies and the specific environment). The commercial walkie-talkie is light and beautiful in appearance. The walkie-talkie is tied around the waist through the belt clip of the walkie-talkie, and you can free your hands to improve work efficiency by wearing headphones. The price of commercial walkie-talkies is relatively high as that of professional walkie-talkies, and they are generally used in shopping malls, supermarkets, retail, factories, and manufacturing industries.
