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1. A switch is a dumb device it just transfers data via the ports 2. if you are having slow or dropped data this possibly is due to bandwidth issue. 3. contact your internet service provider to check your speed and you line condition. 4. You didn't say if you were using a router, but if so this could what is call "collision" 5. some switch do this due to speed of the data throughput\.
A "Network Hub" is not a good device for connecting to a network. Collision is the most common problem with this device. Since you said that the device is new, maybe you can return it to the shop you bought and buy a "4 port Network Switch".
What the difference is that a hub transfers all the data that comes in one port to all the other ports. But the switch can decide destination of the incoming data. So, when the hub is sending data to a device, that device has to know whether or not to accept the data. This doesn't happen here in your case. So, better buy a "Network Switch". They both look alike and price difference is also not that high.
Network collisions happen all the time (lots of data, small pipeline) and are not a major problem. The router requests a resend on data expected but not received. Personally, I tend to ignore the "collision" indicator. All the data manages to get through anyway, in a matter of milliseconds delay.
Col probably means Collisions. There are probably collisions going on on your LAN. Collisions can happen when there are two adapters with the same IP address or when there's a bad cable. My suggestion is that you make sure that you have unique IP addresses and that you don't have any bad cables - cable tester comes in handy.
The hub is showing you that a network connection is present. The LED that says Col indicates when collisions occur. In a blatant attempt to avoid explaining how ethernet networks operate, suffice to say that no collisions is a good thing. Some collisions is tolerable and normal, and a lot of collisions indicates a problem and can bring your network to its knees. Don't forget to turn networking on in your xbox.
If all lights are flashing on this device and there's no computer or devices connected on those ports and only telling us that the hub is already bad and there's no way to reset this hub since it doesn't have any reset button, the next step that you need to here is to ask for a replacement for this device I think it has a 5 year or a life time warranty from Dlink so contact them and have this hub replace...
You have a real beast screwing around in that hub. You have choises:
1. Call the animal control department :)
2. Shoot it with a 22 :):)
3. Get another one.
A Hub acting like that has got its marbles juggled. Switching it on and off is the only way of flashing, and if that doesn't work, its jinxed. If you network it, you could spend a lot of time fixing network problems.