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For the purposes of this FAQ entry:
•Very low is 2% or less of the expected 802.11 data rate (e.g. 11 or 54 Mbps).
•Erratic is a sudden drop to zero or nearly zero percent of the expected 802.11 data rate for several seconds. Or, a communication that simply stops and does not resume.
There are two factors to consider in troubleshooting this problem:
•is this problem limited to wireless communication? or,
•does this problem occur between the LAN members if they are wired?
To determine whether the wireless connection is involved, eliminate wireless from the equation and attempt the traffic again.
•Repeat the problem, writing down the exact steps necessary to do so
•Disable the wireless network device in your computer(s)
•Connect your computer(s) using an Ethernet cable. If you are using a wireless router with LAN ports, connect to the LAN ports. If you are using an Wireless Access Point, connect the computers directly using a cross-over cable.
•Create the traffic again.
•If the problem still exists between wired LAN clients, the resolution should start with considerations other than wireless -- such as your router, your network stack, or the network software or hardware on the other LAN client involved. This FAQ entry will not be of any further help.
•If the problem no longer exists between wired LAN clients, the solution will involve adjusting the wireless portion of your network and may be covered by the remainder of this entry. To continue, first return your network back to its wireless topography.
The most frequent problems and resolutions are:
•An enhanced mode is involved in the issue. As a work-around resolution, reduce or eliminate the enhanced modes such as 4x, Super-G, faster connections than the normal 54 Mbps 802.11g or 11 Mbps 802.11b, and etcetera. Reconfigure this on the AP or wireless router.
•The client drivers or AP firmware have a problem. Ensure they are updated to the latest versions. Reboot the AP. Check the support databases and forums for the brands involved.
•The wireless connection is poor, and the AP or wireless card is stepping down the data rate to reduce errors. Experiment with adjusting the location of the AP and/or client(s) involved. Even if the signal is strong, a poor signal pathway can cause the digital signal to have an imprecise (or "fuzzy") quality. Even an adjustment of a few feet can change this condition for better or for worse. When a large amount of data is traversing, the number of data errors climb and the AP/Clients react to that by lowering the data rate.
•The client hardware is misconfigured. In the Network Connections folder, open the Properties page for your wireless connection. Click on Configure toward the top of the dialog, then click on Advanced. Return any parameters you previously changed here to factory defaults. If you have made previous changes, but do not remember what the defaults were, you can uninstall and reinstall your hardware to return to the defaults.