HD Network Camera Product Features: ◆ Support Camera IP conflict, network dropped calls and other network anomalies alarm function ◆ Embedded Web Server for users to achieve real-time monitoring of the front of a standard IE browser and setting management ◆ Built-in microphone, support two-way voice to achieve one-way or two-way intercom pickup date and time ◆ OSD OSD ◆ support many DNS (DDNS) to install monitoring equipment prices, the domain name server to avoid problems caused connection abort ◆ local analog output to install monitoring equipment company, easy to install Debugging support network remote upgrade ◆ ◆ support TF card memory camcorder install monitoring equipment, support video files and pictures stored in access control systems deal with common problems and Symptom 1: access control device after a good connection with the software testing can not communicate with the computer. When using RS422 communication possible reasons: (1) the wiring between the controller and the network expansion is incorrect. (2) on the controller jumper is closed (communication for RS232); distance (3) controller to the network expansion over the effective length (1200M); Serial (4) computer is normal, with or without normal join the family occupied by other programs or install monitoring equipment, and then test to exclude these reasons; (5) the software settings, the device address number actually set, coupling does not correspond; (6) line interference, not the normal communication. Schools install monitoring equipment _ source maintenance (certified) _ streets to install monitoring equipment provided by Zhengzhou 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.