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4-Port USB PS2 Combo KVM Switch with Cables, Retail
- Controls four computers from a single console (Keyboard/Mouse) over PS/2 and/or USB connections
- Supports Windows®, Linux®, Mac® OS9/OS X®, Sun Micro Solaris 8 (For Sun Micro users, the external power adaptor is necessary when using the KVM Switch).
- Emulates a keyboard on each PC to allow your computers to boot normally without a keyboard error.
- Supports hot-swapping. All devices connected to the KVM can be added or removed at any time, without shutting the unit down.
- Supports 2 types of switching: (1) Hardware Push Button, (2) Hot-Keys on PS/2 and/or USB of keyboard.
- Supports Auto-Scan function to alternate video between both computers in preset intervals.
- Easy switching via Hot Keys or logically designed port selectors
- Supports LED display for Selected and On-Line status monitoring.
- Supports VGA resolutions up to 2048 x 1536 maximum.
- Supports Beeper during Switching enabled.
- Self powered through PS/2 and/or USB connection (the optional power adapter is not included, and we do not stock it)
- Fully compliant with the USB 1.1/ 2.0 specification.
- User's Manual (Oct 12, 2007)
Microsoft® and Windows® are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries.
Linux® is the registered trademark of Linus Torvalds in the U.S. and other countries.
Apple®, Mac®, and OS X® are trademarks of Apple Inc., registered in the U.S. and other countries.
Questions and Answers
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This unit can use an AC adapter but it works mostly fine without one. One minor problem with the unit is that if no attached PCs are powered up, then the unit gets no power, and loses its current setting, and defaults back to selecting PC 1. This is inconvenient if you are turning PC 2 or 3 or 4 on and off (say, during some testing), and on each power up, have to manually re-select the target PC.
An AC adapter solves this problem, by maintaining power even if all attached PCs are off.
AC adapter specs: The unit has a DC power input jack, 5v, center pin positive, outer ring negative. I measured the current draw, 5v at about 200 mA. (200 milliamps = 1/5 of an amp). DC power jack is size 5.5mm OD, 2.1mm ID (OD = outside diameter, ID = inside diameter, or diameter of the center pin). At Radio Shack, this is DC power jack size "M". (If you want to assemble or make your own)
However, you can buy an inexpensive AC adapter that fits. Look for an AC adapter for a LeapFrog kids learning toy, either the Leapfrog Clickstart My First Computer, or the Leapfrog Zippity Learning System. These toys use the same AC adapter: 5v, 500mA, 2.5watt or VA, and the DC power plug on these is the right size and polarity.
You can find them on web or maybe a ToysRUs store for $5 to $15. (Note that there are AC adapters for other Leapfrog units that are the wrong voltage or type, so do not buy them. They won't work, or worse, they might damage your Monoprice KVM.)
Also, on problems with some keyboards and mice:
If you are having trouble with a mouse or keyboard, you might try a different age keyboard or mouse that was designed for BOTH PS2 and USB. That is, the interfaces are different and much older keyboards are PS2 only and some newer cheaper keyboards and mice are designed to be USB only, even if you connect with a PS2 adapter. (the USB-PS2 adapter adapts only the wiring and connect pins it does change the signals, voltage, or timing. The internals of the keyboard or mouse still have to be able to process both the PS2 signals and the USB signals to work with both interfaces)
I don't know if the KVM unit can do all the USB - PS2 conversion if a PC works with one type only, and the keyboard or mouse is the other type only.
To tell if you have a truly combo keyb or mouse, either look up the specs or details on web for the product item / model number, and see if the specs state that it works with both. Or if the item came with a USB-PS2 adapter, then it was designed to work with both.
If it is a newer USB only device, it might not work through the KVM to a PS2-only computer, but I have not done any testing so I don't know for sure.
PROS: Usually works well with mix of PS2 and USB keyboard mouse PCs.
CONS: Defaults back to PC 1 setting if no power is applied to unit from an attached PC or optional AC adapter.
PROS: Just to add to my previous review. I still love the unit but I did experience some problems where the monitor and keyboard would go whacky and I would have to press the reset button on the unit (every few days) to get it working again.I fixed this by plugging in an old 5vt power supply from a dead DLink switch. I've never had to reset the unit since (months).
CONS: Needs external power to be completely stable. External power supply should come with it (although I grant they are cheap and easy to find).
PROS: Great price for the product. Great for a mix of newer USB devices and legacy PS/2 devices.
CONS: Periodically engages CAP lock. (Switch to another source and back to fix) Periodically decides to repeat your key press random number of times. Occasionally gets totally confused and needs a reset.
I wish there was a firmware upgrade to fix these problems.
The only two improvements I would suggest: Have the "beep" disabled by default. Also, even though there are threaded screw holes for mounting rack ears, no rack ears are provided. You must buy the 8-port version for rack mounting.
Even those mixed usb, ps/2 system work without any problem at all.
All machine connected and reboot correctly.
Best product in class.
The only thing that stopped it from being a 10 out of 10 is the placement of the USB and PS/2 ports on the KVM, I wish they were on the sides or on the back to allow better cable managment. Other than that it's a great KVM for an amazing price.
PROS: Single cable from kvm allows for a super clean installation and cable management, KVm cables are long enough for my application. Very clean look to it, and fast switching. Both PS/2 and USB inputs.
CONS: USB and PS/2 ports are on the front of the box.
PROS: Just plug and play... can not ask for anything better.... worked perfectly on my win 2003 server & win 7 machine.
Would recommend to anyone.
CONS: Cant figure out how to swap using keyboard but I am assuming if I read the directions clearly it would tell me...
PROS: Cost effective, available in quantity, timely delivery.
CONS: Clients can discover our cost of any product from Monoprice by going to your website.
My one con about it is I had trouble getting it to work after one of the PCs was in standby for a while. The other two I had hooked up were turned off, and the "active" one had been in standby for a few days. When I turned it back on, the switch didn't come on, so the mouse and keyboard didn't work. I rebooted the PC, and the switch came back. Hasn't happened since. Not sure what caused it, but it's something to that happened to me that prospective buyers should be aware of.
Doesn't need AC power
CONS: Can be a little finicky sometimes