Use ScrollLock and NumLock Keyboard LED As Network Traffic Indicators with Network Lights
Network Lights is a Windows program which blinks and flashes keyboard’s NumLock (Number Lock) and ScrollLock (Scroll Lock) LEDs (Light Emitting Diode) to indicate outgoing and incoming network traffic packets on network connection on active network interface in Windows.
Network Lights is useful for user who wants to monitor upload or download network activity, or more accurately, whether is the any network traffic been sent or received simply from keyboard Scroll Lock and Num Lock indicators. Each LED will flicker when network traffic is detected. In this way, no screen estate is wasted just to display a small window to indicate the network traffic status.

Network Lights will run silently as a system tray icon. Other than flashing and blinking the keyboard’s NumLock and ScrollLock LED indicators, Network Lights also records network statistics.
Network Lights is developed by IT Samples. Download Network Lights 1.1.
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November 14th, 2009 01:14
yes it does work with them. Or at least with one. Used “forced keyboard capture” with IBM usb keybd and T41 notebook w/ dock.
The only annoyance is the numlock and scroll lock get turned on and off with the LEDs.
October 25th, 2008 01:41
Just great, thanks so much, that program is exact what i`m looking for! I like idea to use external indication that is not wasting workspace on the screen… And it`s also looks cool, isn`t?:-D
July 12th, 2008 00:33
Does not work with usb keyboards.