Hotkeys for D-Link DKVM-2

Try pressing your "Scroll Lock" key twice fast.

Short answer:
There are two ways to switch from one machine to the other with the keyboard
1. Press Scroll Lock key twice, then the Up or Down arrow key.
2. Press Scroll Lock key twice, then enter 01 or 02.

Long answer (from the manual posted at www.belkin.com):
You can select which computer to operate by either the front-panel push button
located on the top of the Switch or through hot key commands. Note that it will
take 1-2 seconds for the video to display after switching. This is due to the
refresh of the video signal. A re-synchronization of the mouse and keyboard
signal also takes place. This is normal operation and ensures that proper
synchronization is established.
You can conveniently change ports on the Switch through a keyboard command
sequence using the "SCROLL LOCK" key and up and down arrow keys. To send
commands to the Switch, press the "SCROLL LOCK" key twice within two seconds.
You will hear a beep for confirmation. Then you can press the up or down arrow
keys to switch between ports.

You can switch directly to any port by entering the Switch port number you wish
to use. For example, if you press "SCROLL LOCK", "SCROLL LOCK", "2", the
computer on port 2 will be selected.
AutoScan Mode
In AutoScan mode, the Switch remains on one port for eight seconds before
switching to the next. This time interval cannot be changed.
To enable AutoScan mode, press "SCROLL LOCK", "SCROLL LOCK", "S".
Note: There is no mouse or keyboard control in this mode by design, in order to
prevent errors. If it were enabled, the user could move the mouse or use the
keyboard while the KVM Switch is switching to the next port. This could interrupt
communication between the computer and Switch that might cause erratic mouse
movement, or result in errant display of characters when using the keyboard.
To disable AutoScan mode, press the space bar.

Try pressing SCROLL-LOCK, twice, quickly, and then UP-ARROW or DOWN-ARROW or PAGE-UP or PAGE-DOWN.

Hit your left Ctrl key twice

Make sure your keyboard and mouse are plugged into the correct usb slots on the switch. One is labled for keyboard, and the other for mouse. If you mix these up, those hotkeys will not work! :) Also, try tapping scroll-lock twice to switch. It's much better than trying to use the num-lock + and - keys, since it's only a two-way KVM. Tapping Num-lock twice automatically switches, so you don't have to hit multiple buttons.

Make sure your keyboard and mouse are plugged into the right USB ports on the switch. If you plug the keyboard into the mouse USB port the hotkeys will not work! The USB ports on the KVM switch are labeled under each port, with a mouse and keyboard icon respectively.From the Quick Start Guide/Manual: The Numlock hotkeys are listed as:
[Num Lock]+[-] [1] Switches to output 1
[Num Lock]+[-] [2] Switches to output 2
[Numlock]+[-] [A] Auto-scans and chooses which ever port is connected.
Alternatively: Tap [Scroll Lock] twice to automatically switch between ports.
Note: I've never been able to get the Numlock key combinations to work correctly. I always just use double-tap [Scroll Lock] trick to switch.
If you get stuck with your scroll-lock and Alpha lock lights flashing, just hit [Esc] to fix it.
Source: http://www.aten.com/download/download.php#productGuide (Scroll down to "Quick Start Guide" and choose CS62U out of the drop down).

turns out if I double tap and hold the scroll lock key, the kvm rapid beeps and while in this mode, I can hit the numbers 1 to 4 to pick the port I want to connect to.

The double tap on the scroll lock suggestion was sent to me by a fixYa responder. Thanks,

You can try CTRL CTRL instead of scroll-lock. it was working for me. It is not mentioned in the manual.

try holding down the function key and hitting the numlock or scroll lock key, this is usually how you engage or disengage the laptops function keys on the keyboard. Most laptops have a light that will turn on and off when you do this, indicationg that the funtion keys are in use. depends on the brand

for mine it's:
tap scroll lock twice then press 1 or 2