Preventing signal interference by setting the signal strength of APs


To prevent signal interference, adjust APs' transmit power and increase APs' deployment intervals. You can also use directional antennas and smart antennas to control signal coverage areas and prevent interference.

Other related questions:
How do I determine the signal strength
Run the display cellular command to view the Current RSSI field. If the Current RSSI field displays a value smaller than -85 dBm, the signal strength is weak and the data service rate is low and unstable. If the Current RSSI field displays a value smaller than -100 dBm, data cards may fail to register with or dial in to the network.

Why is the signal strength that a STA receives from an AP weak
The possible causes are: - The transmit power of the AP is low. In this case, increase the transmit power. - The antenna system of the AP (indoor DAS AP) is not properly deployed. 1. The output power on antenna interfaces is low because the AP connects to excess antennas. Or the feeder lines are too long. 2. The passive devices (combiner, splitter, and coupler) do not comply with design principles or specifications or are not properly connected. 3. The passive devices have unloaded interfaces. - The STA is far away from the AP's antennas, so the signal loss is large. - Signals are blocked by a beam, post, concrete wall, metal door, or other obstacles between the STA and antennas. In this case, change the antenna installation positions.

How to determine the current signal strength
Run the display cellular command and check the value of the Current RSSI field in the displayed output information. If the RSSI is smaller than -85 dBm, the signal strength can be deemed as weak. In this case, data services run in a low rate and are not stable. In an environment where the RSSI is smaller than -100 dBm, some data cards cannot even register to networks or dial up.

What STA information can be displayed on a WLAN device
1. Number of STAs associated with an AP For V200R005, run the display station assoc-num command. For V200R006, run the display station ap-id xx command. 2. STA information For V200R005, run the display station assoc-info sta sta-mac command. For V200R006, run the display station sta-mac sta-mac command. The display contents vary depending on versions. The following uses V200R005C10 as an example: display station assoc-info sta d420-6df4-f37e Station mac-address : d420-6df4-f37e //STA mac Station ip-address : //STA IP Station gateway : Associated SSID : jsldoc //SSID Station online time(ddd:hh:mm:ss) : 000:00:04:20 //Online time The upstream SNR(dB) : 30.0 The upstream aggregate receive power(dBm) : -79.0 Station connect rate(Mbps) : 23 //Rate Station connect channel : 1 //Channel Station inactivity time(ddd:hh:mm:ss) : 000:00:00:00 ...... Station's RSSI(dBm) : -66 //Single strength Station's Noise(dBm) : -109 Station's radio mode : 11b //Network type Station's AP ID : 6 //AP ID (supported only by V200R005C00) Station's Radio ID : 0 //0 indicates 2.4G, and 1 indicates 5G (supported only by V200R005C00). Station's Authentication Method : OPEN Station's Cipher Type : NO CIPHER Station's User Name : d4206df4f37e Station's Vlan ID : 28 Station's Channel Band-width : 20MHz Station's asso BSSID : dcd2-fc9a-2110 Station's state : Asso with auth Station's Qos Mode : NULL Station's HT Mode : - Station's MCS value : 0 Station's NSS value : 0 Station's Short GI : support Station's roam state : No

How can I check image signal interference?
Check the following three items: Whether strong interference sources exist near the camera. Whether the device voltage is stable. Whether the device is properly grounded.

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