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Poll | 轮询
A poll is a minute amount of data sent periodically by a device to indicate to its supervisor that it is still activate and has a valid signal. There are different sorts of polling that is required by certain grades and different types of equipment such as:
- Modules connected the cloud poll so that the cloud knows it is still active and has a strong signal
- Wireless detectors poll the wireless receiver on the alarm system to maintain its supervision. If the detectors do not poll in, the panel will go in to a supervision fault
- Third party signalling devices will periodically poll to show that it is still online
轮询是设备定时发送一小部分的数据给其监管员告知其依然处于激活状态并具有有效信号。
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