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<p>1. The extension can call but there is no video (the screen is not bright)? A. check whether the k line on the host power interface is connected with the g line; B. whether the two lines 7 and 8 of extension terminal are connected properly. 2. The extension can call but there is no video (the screen is bright)? Check whether the video cable from the host to the extension is reversed. 3, the host calls the extension, the extension only rings once and the line is disconnected? A. whether the extension is programmed into a secondary extension; B. whether the power supply voltage of the extension terminal is normal (not less than 15v during operation); C. replace the host or extension and try again. 4. The extension can call but cannot monitor the host? Whether the host number is compiled into a secondary host (the extension cannot monitor the secondary host).</p>
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Building intercom system is a management system that enables visitors, residents and property management centers to talk to each other in multi-storey or high-rise buildings, exchange information and control the safe access to the community. Simply put, building intercom refers to your doorbell, that is, a set of visitor intercom management system (a set of humanized management visitor operating system including software, hardware and after-sales service). Building intercom is a kind of equipment used for multi-storey or high-rise residential buildings, apartment buildings inside and outside, information transmission between households, anti-theft door control and residents to the building duty room alarm in case of emergency. With the increasing popularity of building intercom, failures will inevitably occur during use. According to my 11-year experience as a customer service engineer in Xingguang Building Equipment Co., Ltd., this paper analyzes the matters needing attention in construction and debugging and the treatment methods of common failures.
Military manufacturing
Building intercom top ten brands
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