Hawking Technology MC4-H2 - Manual (Page 7)

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Operation
The keyboard and mouse will function no differently than if the keyboard and mouse were connected directly to the PC.
Switching
You can use of three ways to switch among the PCs.
The first way is to simply press the button for the desired PC on the front panel of the MC4-H2 or MC4-H2-SW.
The second way to switch is through a hot-key combination from the keyboard. The hot-key combination is as follows.
Press and release: “Scroll Lock”
Press and release: “Scroll Lock”
Press and release: “01” or “02” or “03” or “04” If more than 1 MC4-H2 or MC4-H2-SW units are chained together
then you can switch to the other pc’s by pressing their corresponding 2 digit number “05” – “12”
The MC4-H2 or MC4-H2-SW will now switch to the PC connected to the port corresponding to the number pressed.
There is a 2 second timeout between each hot key. This means that if the second Scroll Lock is not pressed within 2
seconds of the release of the first Scroll Lock, the sequence will be aborted and will not MC4-H2 or MC4-H2-SW.
The same situation applies to the number pressed after the release of the second Scroll Lock.
The third way to switch between PC’s is the use of RS-232 serial control on the MC4-H2 ONLY. Connect the supplied
serial cable (Mini-stereo to DB9 Female) to the RS232 port on the front of the MC4-H2 and the other end to a PC.
Baud Rate is 4800:
To switch to a PC send the following ASCII commands to the MC4-H2 (ONLY).
Sxx – where “xx” is the 2-digit number of the PC you wish to switch to
Example: S01 – switches to PC #1
By default, when switching, the MC4-H2 or MC4-H2-SW will not switch to a port that does not have a powered PC. (i.e. the red
PWR led is not on). This behavior however, can be changed via the Serial control.
The command to allow switching to a non-powered PC is:
P1
The command to disallow switching to a non-powered PC is: P0
Setting the address of the MC4-H2 or MC4-H2-SW
Each MC4-H2 or MC4-H2-SW needs to be assigned an address in order to function. The 3 different addresses are the following:
1. Master
2. Slave 1
3. Slave 2
There must be a Master unit for any mouse/keyboard/video communication and switching to take place.
The MC4-H2 or MC4-H2-SW unit with the Master address will number the PC's attached to it, 1-4.
The MC4-H2 or MC4-H2-SW unit with the Slave 1 address will number the PC's attached to it, 5-8.
The MC4-H2 or MC4-H2-SW with the Slave 2 address will number the PC's attached to it, 9-12.
There are 2 ways to set the address of an MC4-H2 or MC4-H2-SW.
1. Via the front panel push buttons
2. Via Serial control (On the MC4-H2 Only)