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Windows 7/Windows 8 showing correct connected devices Supports special keyboard and mouse functions Longest, depending on connected system's OS (about 10–15 seconds) This means that you can now use the extra function keys, wheels, buttons, and controls that are commonly found on modern keyboards and mice. This class of KVM switch overcomes the frustrating limitations of an Emulated USB Class KVM by emulating the true characters of the connected devices to all the computers simultaneously. DDM USB KVM Dedicated Dynamic device mapping USB console port(s) work with all USB-HID (including keyboard and mouse) and maintain the connected devices' special functions and characteristics to each connected/targeted system. This class of KVM takes advantage of DDM (Dynamic Device Mapping) technology. Semi-DDM USB KVM Dedicated USB console port(s) work with all USB-HID (including keyboard and mouse), but do not maintain the connected devices' presence to all of the targeted systems simultaneously. There are also USB KVM devices that allow cross-platform operating systems and basic keyboard and mouse sharing. However, this class of KVM switch only uses generic emulations and consequently has only been able to support the most basic keyboard and mouse features. Emulated USB provides an instantaneous and reliable switching action that makes keyboard hotkeys and mouse switching possible. Emulated USB KVM Dedicated USB console port(s) are assigned to emulate special sets of USB keyboard or mouse switching control information to each connected/targeted system. The switching to different ports is just as if you were to physically plug and unplug a USB device into your targeted system.
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USB Hub Based KVM Also called an Enumerated KVM switch or USB switch selector, a connected/shared USB device must go through the full initiation process (USB enumeration) every time the KVM is switched to another target system/port. The classes of KVM switches that are reviewed, are based on different types of core technologies in terms of how the KVM switch handles USB I/O devices-including keyboards, mice, touchscreen displays, etc. With the popularity of USB-USB keyboards, mice, and I/O devices are still the most common devices connected to a KVM switch. ( June 2014) ( Learn how and when to remove this template message) Statements consisting only of original research should be removed. Please improve it by verifying the claims made and adding inline citations. This section possibly contains original research.