Spare Qi monitoring equipment installation quote, generally speaking monitoring equipment installation, maintenance, each system must establish the appropriate spare parts network monitoring equipment installation, major reserve some of the more important and difficult immediately after the repair of damaged equipment, such as cameras, lenses, monitors. These devices can cause the system fails if not run properly, must be replaced, it must have a certain number of spare parts, spare parts inventory and must be constantly updated according to the characteristics of the device can run cycle maintenance and equipment. Frequently asked questions and deal with access control systems Symptom 4: Access has been normal use, one day suddenly found all valid cards can not open the door (becomes invalid card). Possible causes: (1) The operator will set up a rest day access (rest day all the cards are not open); (2) the operator will access is initialized operations or other causes the controller to perform the initialization command; monitoring equipment installation training, Jiaozuo monitoring equipment installation, repair and maintenance information source provided by the Zhengzhou source maintenance Electronic Technology Co., Ltd .. Zhengzhou source maintenance Electronic Technology Co., Ltd. (www.hnxywb.com) strong, credible, in Zhengzhou integrated monitoring systems and other industries has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead source maintenance and you work into the brilliant, for a better future!