Full resolution of Wireless LAN faults

In the face of such a large number of network technologies, we should summarize the numerous fault problems in the past so that we can effectively use them in future studies and work. Here we will introduce them to you.

Now the family or organization has gradually begun to use wireless networks, especially the recent popularity of cheap Wireless LAN packages, wireless LAN is no longer "High and Low ".

The problems and faults that follow have also begun to upset users of the wireless LAN. Next we will look at various Wireless LAN faults to see how to solve these new problems.

Wireless LAN faults:

The USB wireless Nic cannot be installed. It has been confirmed that the USB port in BIOS is not disabled because the USB flash memory can be used normally.

Causes and Solutions:

Many USB interface wireless network card installation requires some skills. In contrast to the installation sequence of traditional hardware devices, you must first install the NIC driver before installing the NIC hardware. These wireless NICs mainly refer to wireless NICs with USB interfaces. The wireless network card of the PCMCIA Interface does not have this problem.

Wireless LAN faults:

The system crashes after the wireless PCMCIA Nic is unplugged.

Cause and solution:

Generally, this type of operation is caused by non-standard operations. The standard operation sequence is to first disable the device in the PCMCIA Nic attribute, and then unplug the device. Or select "pop-up Device" and unplug the NIC.

Wireless LAN faults:

If you purchase a new wireless network device, it is often abnormal when you change the location, and you do not know where the interference comes from.

Cause and solution:

The frequency range used by wireless networks belongs to the high frequency range of GHz. In terms of electrical equipment used in daily life and office work, due to the wide frequency difference, wireless networks do not interfere with each other. Currently, the most commonly discovered interference devices are microwave appliances. Please note that the microwave oven at home is far from wireless network devices. When it is inconvenient to find out the potential interference causes, it is easier to change the channel to avoid interference, because the wireless network itself has more than a dozen channels for adjustment. In practice, it is difficult to use wireless devices due to natural interference.

In addition, adjust the signal according to the following steps to achieve the best signal reception effect:

Place the AP on a flat desktop. The smaller the angle between the antenna and the horizontal plane, the better. The greater the thickness of the obstacle that the signal can traverse. Avoid signal traversing through metal substances. Confirm that the Wireless AP is in the optimal receiving position. AP should be at least 1 ~ away from other appliances ~ 2 meters.

Wireless LAN faults:

After the wireless network is installed, it is found that the data transmission speed is fast and slow.

Cause and solution:

Because wireless devices are closely related to environments such as distance and interference, they can automatically adjust the speed according to the environment, so the speed change is normal. The simplest way is to reduce the data transmission speed when the distance is far away. Generally, the AP of the wireless access device can be placed in the center of the wireless LAN device group, so that all wireless terminals will not be too far away. The following table describes the relationship between speed and transmission distance based on the 802.11b standard:

Wireless LAN faults:

About 50 Wireless terminals (one AP and 50 terminals) of a certain brand are installed. The speed is slower than that of wireless devices of other brands. Is there a problem with the brand.

Cause and solution:

Reduce some wireless terminals and test the connection from several terminals. How is the data transmission speed? If the AP is stable, the burden on one AP is too heavy. To enable the wireless client device to have sufficient bandwidth available, it is generally recommended that an 802.11b AP support about 30 Wireless terminals in the optimal state, although one Wireless Access Point (AP) theoretically, more than 70 Wireless terminals can be connected.

Wireless LAN fault:

The two APs with a speed of 11 Mbps are placed in two buildings, respectively, with a straight line distance of about 60 meters. The connection cannot be established when the window is closed, however, you can move the network adapter and AP to the window and open the window to establish a connection, but the data transmission is not stable. How can this problem be solved.

Cause and solution:

To make the transmission distance longer or enhance the transmit power, you can purchase a separate antenna. Otherwise, the signal transmission speed and stability of wireless products are greatly affected by the environment. Given that some wireless network equipment companies do not have antenna products or users are reluctant to invest more, it is recommended to adjust the antenna angle and product location to reduce environmental signal interference and other methods to improve the connection status. In addition, you can replace wireless product NICs and APs at a speed of 22 Mbps (802.11b +), which provides better transmission performance. This also reminds users who are preparing to purchase wireless devices to purchase high-speed wireless devices as much as possible if funds permit them, the signal transmission distance and stability are greatly improved.

Wireless LAN faults:

After the Wireless Broadband Router is installed, the router cannot be pinged.

Cause and solution:

Generally, wireless broadband routers have factory default IP address and gateway settings. You need to modify the settings to be the same as those of your network segment. Otherwise, the Ping will fail.