What is a USB KVM?
A USB (Universal Serial Bus) KVM switch is very similar to a legacy KVM in that it allows you to connect multiple computing devices to a single keyboard, mouse and monitor. The key difference is that the USB KVM does not utilize PS/2 keyboard and mouse technology. All keyboard and mouse connections are accomplished using
Universal Serial Bus technology. Depending on manufacturer and model, you will find various options that benefit the end user. They include, but are not limited to:
- Audio pass through
- Microphone pass through
-
Universal Serial Bus ports for external USB device connection
- VGA or DVI display support
USB Switch Applications
USB switches can be used in a variety of situations. From a user that simply has two CPU’s that wishes to consolidate into a single keyboard, mouse and display; all the way to the high end user that needs access to many devices and multiple displays with a single keyboard and mouse. The need for
Universal Serial Bus ports, audio and microphone switching also play an important part in the switch application.
Key thing to consider when buying a USB KVM Switch
The things to consider when purchasing your switch include the following:
-
Quantity of source devices - 2 port, 4 port, 8 port, and 16 port are the most popular with some manufacturers providing 32 and even 64 port models
- Cable lengths - short applications can use standard
Universal Serial Bus and Video cables, longer runs will require "combo cables" or KVM dongles for maximum distance
- Type of display, be it VGA or DVI
- Required resolution - higher resolutions generally require dual link DVI connections
- Required number of user displays – dependent on model of
switch and dual head support of connected computer
- Universal Serial Bus port extension / sharing for peripheral
devices - look for devices with an integrated USB hub
- Required audio and microphone capability - look for devices with audio support
- External power supply or draw from connected PCs - some devices can draw power directly from attached PCs saving power strip space
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