Hall Research 4-to-1KVM User Manual

Hall Research Technologies, Inc

1163 Warner Ave.

Tustin, CA 92780

Phone: [phone]

Fax: [phone]

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Model 4-to-1 KVM

Server Switch

Control 4 PC's from one keyboard, monitor and mouse

UMA1018 Rev. n/c

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General

4-to-1 KVM

different PC’s or servers.

It switches the video to display the selected PC’s video output at full
resolution using buffered and wideband video circuits. It also routs
the signals from the mouse and keyboard to the selected pc, while, at
the same time, emulating a keyboard and a mouse for the unselected
PCs so that they can detect and communicate with a “virtual” mouse
and keyboard in order for the PCs to operate normally.

Upon power up the
mouse plugged into the mouse port and initialize that mouse. The same will then be done for the keyboard.

Even though it has a connector for an external power supply, this unit draws power from the connected PC’s
and no power supply is needed. The external power supply is only used if a special keyboard (such as one
with a bar-code reader) that has a high power requirement is used.

There are 3 ways the
located on the front panel of the Switch. The second is through a hot-key sequence from the keyboard and
the third is through an external device called the MC4-HRT.

The unit supports 2-button, 3-button, and scroll mice. 4-button mice are not supported.

When the

allows one monitor keyboard, and mouse to control 4

4-to-1 KVM

4-to-1 KVM

4-to-1 KVM

is powered up or reset, the PC that was last selected will be selected by default.

will locate and identify the type of

can switch from one PC to another. The first is through the buttons

There are two different types of LEDs on the front panel. When the LED labeled ON is illuminated then the
PC attached to that port is powered on. When the LED labeled SEL is illuminated, then the PC attached to
that port is the selected PC. The selected PC is the PC currently being controlled by then keyboard and
mouse.

Supported Systems and Peripherals

• All PC compatible systems and notebooks

• Standard PS/2 and AT Keyboards (Legacy AT keyboards may require connector adapters)

• Standard (2-button) and wheel (3-button) (e.g. Microsoft Intellimouse) mice. 4-button mice are not

supported.

• VGA, XGA, UXGA video resolutions to 1600x1200 at 50 to 85 Hz refresh rate.

Features

• Clear and sharp video switching

• Extremely Reliable

• Quick and seamless switching between PC’s

• LED indicators of PC power status and PC selected

• Comprehensive PS/2 protocol emulation for keyboard and mouse for all PC’s at all times

• Hot-swapping capabilities of the PC’s and the devices

• Error detection and recovery protocols

• Returns to last selected PC after power off or reset

• Small and compact design

• Designed and manufactured in the USA

SSeettuupp

1. Use the special “KVM” (3-in-1) cable to connect PC #1 to the Switch. The black end connects to the
Switch. The purple connector, of the “KVM” (3-in-1) cable, plugs into the keyboard port on PC #1. The
teal connector, of the “KVM” (3-in-1) cable, plugs into the mouse port of PC #1 (it is best to turn off all
PC’s when you are hooking them to the 4-to-1).

FIGURE 1

4-to-1 KVM

connector functions and the KVM-input cable

2. Repeat step 1 for the remaining PC’s. Note: only 4 PC’s may be connected to the

simultaneously. Not all 4 PC ports need to be used for the

3. Connect a mouse to the mouse port of the Switch.

4. Connect a keyboard to the keyboard port of the Switch.

5. Turn the PC’s on

6. The keyboard and mouse may now be treated as a keyboard and mouse connected directly to the PC that

is selected through the unit.

OOppeerraattiioonn

The keyboard and mouse will function no differently than if the keyboard and mouse were connected directly
to the PC.

4-to-1 KVM

to work properly.

4-to-1 KVM

Switching

The first way to switch between the PC’s is to simply press the button for the desired PC on the front panel of
the Switch.

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: “1” or “2” or “3” or “4”

4-to-1 KVM

The

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 switch.
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 a Switch Partner (see accessories). Simply press the button
on the Switch Partner for the PC you want to switch to exactly like you would use the buttons on the 4-to-1.

Hot Swapping Mice and Keyboards

Hot swapping is not recommended but may be successfully performed. You may unplug the mouse and/or the
keyboard while the switch is powered up and PC’s are connected and powered on. You may then plug in the
same keyboard/mouse or a different keyboard/mouse and the switch will recognize the new keyboard/mouse
and initialize it. The PC’s will not know the difference. The only restriction to this is the following. The
mouse you plug back in must be the same type of mouse as was plugged in when the switch was first powered
up. If the original mouse was a 3-button mouse then you must plug in a 3-button mouse. You may not plug in
a 2-button mouse. If the original mouse was a 2-button mouse then you may plug in a 2-button mouse or a 3­button mouse.

Hot Swapping PC’s

You may hot swap a PC while the
the PC has been turned off, unplug the keyboard, mouse, and video connectors of the “KVM” (3-in-1) cable
then plug them into the PC you wish to insert into the

4-to-1 KVM

the

will detect it and set it up accordingly.

AAcccceessssoorriieess

The MC4-HRT is also known as the “Switch Partner.” The Switch Partner has two PS/2 ports. The keyboard
plugs into one port and the other port connects to the keyboard port of the Switch. The function of the
Switch Partner is to switch from one PC to another when the
press the button the PC you wish to switch to and the light will come on when the
completed the switch.

HRT also offers USB to PS/2 Emulator to allows connection to a single USB port of the PC - required if the
PC has no PS/2 ports for the keyboard or mouse on your PC.

4-to-1 KVM

is powered up only after that PC has been turned off. After

4-to-1 KVM

4-to-1 KVM

setup. Then power on the new PC and

is not conveniently close. Simply

4-to-1 KVM

has

_________ Federal Communications Commission (FCC) Statement __________

This equipment generates, uses and radiates radio frequency energy and, if not installed and used in accordance with the

instructions, may cause harmful interference to radio communications. This equipment has been designed to comply with the

limits for a Class A computing device, pursuant to Part 15 of the FCC rules. Harmful interference when operated in a commercial

environment. Operation of this equipment in a residential area is likely to cause interference, in which case the user, at his own

expense, will be required to take whatever measures are necessary to correct the interference.

© Copyright 2007. Hall Research Technologies, Inc. All rights reserved.

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Hall Research Technologies, Inc.

1163 Warner Ave.
Tustin, CA 92780

Phone: [phone] Fax:[phone]