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upright, may only protrude an inch or so, effectively flush with the front of the rack. The keyboard can then be pulled out, used, and pushed back into the rack. These units still fit within 1U with a short installed depth. The disadvantage in this design is typically a laptop style keyboard will be used with limited keystroke.
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Due to width limitations of a 19-inch rack (approximately 17.75" between the inside rails), the largest LCD to be incorporated into a KVM was 20.1" with a 3:4 aspect ratio. A wide-format 16:9 or 16:10 20.1" display is too wide. It had been previously reported that LG, the last manufacturer for this
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A design variation provides for a slim profile keyboard mounted in independent slides under the display and the display is hinged and mounted at the front of the unit. This allows the display to be deployed with the keyboard stowed so it does not protrude into aisle space. The display, when tilted
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design hinges the display at the rear so that it folds forward over the keyboard for storage. The advantage to this design is shorter installed depth. The disadvantage is the 1U thickness of the assembly limits the available height for the keyboard and track-ball (if installed). Some KVMs have
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design hinges the display at the front edge of the display so that the display folds back. The advantage to this design is the full 1U height can be used for keyboard and track-ball height. The disadvantage is a much greater installed depth.
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allowing the one KVM to control a number of connected computers without using an external KVM switch. The KVM switch can be controlled either by on-screen menus, hot-key commands, or, on some KVM models, via front accessible push buttons.
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and separate rack-mounted keyboards and mice. With the introduction of the LCD computer monitor, it became possible to combine the display with the keyboard and pointing device into a 1U, 2U or 3U rackmount form factor to create the KVM.
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form factor display, announced the product was End Of Life (EOL) in 2013. However, Sharp
Electronics has introduced a new 20.1" display as of 2 December 2014. The most common LCD sizes currently in production are 15", 17", 19" and 20".
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Ibus, a now defunct computer company, secured patent US5388032, filed May 4, 1993, showing a KVM with a "discriminator" to connect to multiple computers. The "discriminator" is now known as a
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A wide variety of pointing devices are available to provide mouse functionality. Many keyboards include pointing devices such as a small
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KVMs did not exist until the advent of the LCD computer monitor. Prior to the introduction of the KVM, there existed rack-mounted
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although there are manufacturers who offer a KVM that can be mounted to a flat surface such as a control console.
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Input signals can be anything supported by the installed LCD controller and includes, but is not limited to,
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Several manufacturers have released KVM models providing two or three displays in a 2U or 3U height.
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been designed to fit into 2U to allow a larger track-ball and full-travel keyboard to be installed.
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The form factor will also support non-traditional video and keyboard/mouse signals such as
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is a computer input/output device offering the combination of a
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There are two basic designs for KVMs: clamshell and lay-flat.
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345:"Computer equipment monitor and discriminator US 5388032 A"
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Output from the keyboard and pointing device can be either
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Computer front-end hardware in a rack-mounted form factor
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385:"20.1-inch High Contrast LQ201U1LW32 LCD Module"
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163:). They are typically constructed to fit into a
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430:"RMTDU 3U 19" Triple-screen Rack-mount LCD"
410:"RD2217 Rugged Rackmount Dual 17" Display"
123:Learn how and when to remove this message
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322:Many KVMs are offered with a built-in
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61:adding citations to reliable sources
286:Triple-screen rackmount LCD display
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365:"End of Life Notification (EOL)"
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48:needs additional citations for
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28:Kernel-based Virtual Machine
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495:Electronic display devices
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26:Not to be confused with
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485:Out-of-band management
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139:Rackmount lay-flat KVM
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475:Computer peripherals
461:at Wikimedia Commons
57:improve this article
490:Computer connectors
318:Built-in KVM switch
269:LCD size limitation
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278:Multi-display KVMs
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113:December 2013
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68:Find sources:
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480:Input/output
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237:Display Port
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165:19-inch rack
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55:Please help
50:verification
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252:KVM over IP
469:Categories
435:2022-03-08
415:2022-03-08
395:2022-03-08
370:2022-03-08
350:2022-03-08
331:References
324:KVM switch
185:KVM switch
83:newspapers
21:KVM switch
308:joy stick
304:touch pad
300:trackball
241:Composite
239:, Video (
200:Clamshell
171:Etymology
208:Lay-flat
149:keyboard
219:Signals
191:Designs
97:scholar
245:HD-SDI
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310:, or
157:mouse
104:JSTOR
90:books
259:PS/2
233:HDMI
155:and
76:news
263:USB
261:or
225:VGA
145:KVM
59:by
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