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A.12.3
Wi-Fi Performance Specifications
WARNING
•
Do perform all network functions of data communication within an enclosed network.
A.12.3.1 System Capacity and Resistance to Wireless Interference
Meets the following requirements:
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All the monitors do not encounter communication loss.
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The total delay of data transmission from the monitor to the CMS: ≤ 2 seconds.
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The delay for monitor-related settings configured at the CMS to be effective: ≤ 2 seconds.
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The total delay of data transmission from one monitor to the other: ≤ 2 seconds.
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The delay for the monitor to reset alarms of another to be effective: ≤ 2 seconds.
Testing conditions are as follows:
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Number of the monitors supported by a single AP: ≤ 16.
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Each monitor can communicate with the CMS.
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Two monitors are used to view other monitors.
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Only one monitor can transmit history data.
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The weakest strength of the AP signal where the monitor is located is not less than -65 dBm.
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The distance between the interfering devices and the monitor is greater than 20 cm. A Wi-Fi interference
(no greater than -85 dBm) in the same channel and a Wi-Fi interference (no greater than -50 dBm) in an
adjacent-channel are presented synchronously. The interfering devices include, but are not limited to, 2.4 G
wireless devices, cellular mobile networks, microwave ovens, interphones, cordless phones, and ESU
equipment. The interfering devices do not include Wi-Fi devices.
A.12.3.2 Wi-Fi Network Stability
The ratio of the communication data loss on the CMS from any monitor does not exceed 0.1% over a 24-hour
period. 12 of the 16 monitors connected to the network roam for 30 times.
Testing conditions are as follows:
■
Number of the monitors supported by a single AP: ≤ 16.
■
Each monitor can communicate with the CMS.
■
Two monitors are used to view other monitors.
■
Only one monitor can transmit history data.
■
The weakest strength of the AP signal where the monitor is located cannot be less than -65 dBm.
A.12.3.3 Distinct Vision Distance
The distinct vision distance between the monitor and the AP is no less than to 50 meters.
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