What should I pay attention to when connecting IP cameras to audio monitoring equipment?

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What should I pay attention to when connecting IP cameras to audio monitoring equipment? [Copy link]

For network surveillance recorders, hard disk recorders and video servers, there are generally video input interfaces and audio input interfaces, and they are one-to-one corresponding, and may be BNC or lotus head interfaces with a hole in the middle. The pickup is generally pulled out by several cables. For the three-core system, one is the audio positive pole, one is the audio negative pole, and the last one is the common ground. The audio positive pole and the common ground are grouped as a group and connected to the audio input interface. Generally, the inside is the positive pole and the outside is the negative pole. Then the power positive pole and the common ground are grouped as a group to supply power. For audio capture cards and other equipment, there is only an audio input interface, and the same principle applies. In fact, no matter what kind of interface is on the back-end recording device, it becomes a few cables when pulled to the front end, and they can be connected one by one.