Troubleshooting method of intercom system in Lilin building

There are many reasons for this. First of all, your family can't speak, or all of them can't speak. If the audio of a possible main line is good, then the source of the fault should be the floor distribution board and your extension. If everyone fails, the problem may be that the host and audio bus cannot be unlocked. Make sure it is locked first, and the unlocking part of the host control is good. Generally, the host computer is controlled by a single chip microcomputer, so it is necessary to look at the schematic diagram before checking the communication part. I don't know what communication bus your host uses. If it is a 485 bus, turn on the monitor to see if there is any image. If there is any indication that the monitor signal can turn on the camera smoothly through the bus, it is not a line problem, or the host computer cannot unlock it after receiving the signal. There may be a problem with the unlocking part of the host control. I don't know what happened in your house. Anyway, I also repair residential buildings for intercom, and the property should be maintained by our company. Generally speaking, the factory installed it well.