Monitoring routine maintenance service mode 1. Periodic on-site service: Monitoring equipment installation quotations based on customer demand, regular visits to the customer's systems and equipment maintenance and repair. 2. engineer stationed outside: send a qualified engineer resident customer site first line technical services. 3.7 × 24-hour response service: Service centers 7 × 24-hour emergency response service monitoring equipment installation fees, once the customer's equipment or system failure, the service center will send engineers to customers within two hours of troubleshooting. 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 Quote | Source Maintenance (certified) | Kaifeng, Zhengzhou monitoring equipment installed by the source maintenance Electronic Technology Co., Zhengzhou source maintenance Electronic Technology Co., Ltd. (www.hnxywb.com) is a leader in Zhengzhou, integrated monitoring system, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In leading source maintenance staff warmly welcome all inquiries negotiations to create a better source of future maintenance.