With the development of wireless communication technology, modern buildings generally have complex structures, and the walls have large signal shielding. The handheld two-way radio cannot meet the call requirements, and large-area blind areas appear. People have put forward higher requirements for signal quality, call security, system capacity and other issues of wireless communication within the building facilities.
As an indispensable part of construction engineering, building wireless communication system has developed into a digital communication system using digital relay technology, low-power antenna, multi-point distribution and full-area signal coverage after several generations of technical improvement and innovation. It facilitates the daily work of the enterprise with stable communication guarantee and comprehensive dispatching function. It plays the role of unified dispatching and commanding and centralized resource allocation in the event of emergency and unexpected events, and is widely used in many fields of various industries.
Characteristics of the modern wireless communication system
Equipped with a smart lithium battery, it has a longer talk time, and has an automatic repair function, which is more convenient to use.
Larger capacity and more efficient frequency: only use the frequency of the 12.5KHz channel spacing.
A digital repeater is equivalent to two analog repeaters, allowing two groups of people to talk at the same time. With this feature, it is possible to set up a channel for the financial charge, and the security service uses another channel, so that the communication between the two groups does not interfere with each other, even when the different groups talk with each other.
High water resistance and explosion-proof models: It is waterproof and can work normally in rainy or harsh environments, ensuring smooth communication even in the harshest environments. The choice of explosion-proof models ensures that the on-site production and rescue personnel are safer.
Digital/analog dual mode operation ensures compatibility with analog two-way radio: Handheld radios and radios are compatible with both digital and analog modes, making it easy for handheld radios and radios to communicate with other units or organizations in a timely manner.
Built-in radio built-in GPS positioning function: Ensure that the leader or dispatcher knows the location of each car and everyone.
Two-way radio monitoring function: The dispatcher or the leader can open the target two-way radio by sending an instruction to monitor the live activities of the members.
Two-way radio check function: The dispatcher can check the two-way radio of the unanswered member, and promptly remind the un-powered members to turn on the two-way radio to ensure that each member communicates smoothly when performing tasks.
With emergency alarm function: When a team member encounters an emergency, just press the emergency button, the dispatch center can receive the distress signal, and know the specific location of the member through GPS to facilitate emergency rescue of other members; The dispatcher can monitor live events via a two-way radio monitoring function.
Support short messages: Support center dispatchers send or receive commands or prompts via SMS.
Secure call: The inherent security of digital encryption technology can prevent criminals from using the scanning device to eavesdrop. When an illegal user scans, he can only hear that the channel is working and cannot hear the call calculation content, fully guaranteeing the legitimate employees in this group. Other members cannot listen while on the call, ensuring the security of internal calls.
With wireless Bluetooth and wireless headset to answer calls.
Two-way radio has a wireless patrol function that allows punching and locating at the patrol point.
The composition of wireless communication
Modern wireless communication system consists of dispatching station, relay station, power divider, coupler, splitter, combiner, signal trunk amplifier, dispatch alarm linkage software, digital two-way radio, headset, patrol point, mobile radio, mobile Radio antenna, omnidirectional ceiling antenna and other equipment and RF cable and high frequency connector. The system should be easy to expand, reliable and easy to repair.
Frequency commonly used in wireless communication systems
350-370MHz (public security fire special)
450-470MHz (for railway)
Wireless communication system is simple in construction and low in cost, and is an indispensable communication system for modern buildings. Especially for construction sites, communities, hotels, etc., it is convenient for instant communication and easy to use.