Sanya weak engineering, professional temperature / power off / UPS / air conditioning monitoring GSM wireless SMS / network alarm system Hainan Liansheng weak construction team: has a wealth of experience in the construction weak engineering, to undertake a variety of weak construction, cabling, installation and commissioning . With strength and rich experience in construction, have more professional knowledge, and strong technical, professional undertaking: monitoring, alarm, network, building intercom, access control, such as construction, cabling, installation and commissioning. Current products are widely used in offices, factories, schools, hospitals, banks, enterprises and units. The company's main applications are: access control systems, remote network access control systems, personnel wages attendance systems, parking systems, the Patrol System, consumer Shoufan system, membership card management systems, campus card systems. Weak generally refers to the DC circuit or audio, video lines, network lines, telephone lines, a DC voltage is typically less than 32V. Household electrical signal input of the phone, the computer, the TV (cable line), audio equipment (output of the line), and other appliances are weak electrical equipment. Electric and electronic Conceptually, usually easy to distinguish, the main difference is the different uses. Strong electricity is used as a power and energy, weak for information transfer. They generally have the following differences: (1) the exchange of different frequencies (2) different transmission mode (3) power, voltage and current size of the different buildings in the weak mainly into two categories: one is the state of security and control voltage level voltage low-voltage electricity, AC and DC points, such as 24V DC control power supply, or emergency lighting standby power. The other is carrying voice, video, data and other information sources of information, such as information telephone, television, computers. Building weak in the narrow sense, mainly refers to: security (monitoring, perimeter alarm, parking), fire (electrical parts), floor control, and network cabling and audio systems, etc. Contact: 13976640562 Miss Zhang Company Name: Hainan Liansheng Science and Technology Development Co., Ltd. Address: Room pretty good Hainan Haikou Meilan District Building, 707 diligent way