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A.12.3 Wi-Fi Performance Specifications
• 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:
â– All the monitors do not encounter communication loss.
■The total delay of data transmission from the monitor to the CMS: ≤ 2 seconds.
■The delay for monitor-related settings configured at the CMS to be effective: ≤ 2 seconds.
■The total delay of data transmission from one monitor to the other: ≤ 2 seconds.
■The delay for the monitor to reset alarms of another to be effective: ≤ 2 seconds.
Testing conditions are as follows:
■Number of the monitors supported by a single AP: ≤ 16.
â– Each monitor can communicate with the CMS.
â– Two monitors are used to view other monitors.
â– Only one monitor can transmit history data.
â– The weakest strength of the AP signal where the monitor is located is not less than -65 dBm.
â– 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.
â– Each monitor can communicate with the CMS.
â– Two monitors are used to view other monitors.
â– Only one monitor can transmit history data.
â– 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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