A - 17
A.10 Wi-Fi Specifications
Protocol IEEE 802.11a/b/g/n
Modulation mode DSSS and OFDM
Operating frequency IEEE 802.11b/g/n (at 2.4G): 2.4 GHz to 2.495 GHz
IEEE 802.11a/n (at 5G): 5.15 GHz to 5.825 GHz
Channel spacing IEEE 802.11b/g/n (at 2.4G): 5 MHz
IEEE802.11a/n (at 5G): 20 MHz
Wireless baud rate IEEE 802.11b: 1 Mbps to 11 Mbps
IEEE 802.11g: 6 Mbps to 54 Mbps
IEEE 802.11n: 6.5 Mbps to 72.2 Mbps
IEEE 802.11a: 6 Mbps to 54 Mbps
Output power <20dBm (CE requirement: detection mode- RMS)
<30dBm (FCC requirement: detection mode- peak power)
Operating mode Infrastructure
Data security Standards: WPA-PSK, WPA2-PSK
Encryption: TKIP, AES
System capacity and resistance to wireless
interference
When the following conditions exist simultaneously,
■ Number of the equipments supported by a single AP: ≤ 4
■ Each equipment can communicate with the CMS.
■ The weakest AP signal strength detected at the equipment’s position
cannot be less than -65 dBm.
■ When the distance between interfering devices and the equipment is
greater than 20 cm, and a co-channel interference Wi-Fi network (at
least -85 dBm weaker than the monitor’s network) and an adjacent-
channel Wi-Fi network (at least -50 dBb weaker than the monitor’s
network) also synchronously exist. Note: The interfering devices do
not include Wi-Fi devices. They include but are not limited to:
◆ 2.4 G wireless devices (excluding Wi-Fi devices)
◆ Cellular mobile communication networks
◆ Microwave ovens
◆ Interphones
◆ Cordless phones
◆ ESU equipment
The total delay of data transmission from the monitors to the Central
Station: ≤ 4 seconds.
Wi-Fi network stability When the following conditions exist simultaneously,
■ Number of the equipments supported by a single AP: ≤ 4
■ Each equipment can communicate with the CMS.
■ The weakest AP signal strength detected at the equipment’s position
cannot be less than -65 dBm.
The time percentage of any equipment failing to transmit data to the CMS
does not exceed 0.1% over a 24-hour period.
Distinct vision distance The distinct vision distance between the equipment and the AP is greater
than or equal to 50 meters.
To Next Page
Loading...
