With advances in technology, the KVM Switch was upgraded to support USB peripherals and this device came to be known as USB KVM Switch. Using this, one can control up to 32 computers with a single set of USB peripherals and switch. Several versions including the 2, 4, 8, 16 and 32 port versions of this device are available, but for even larger configurations the devices can be daisy chained together. Supporting resolutions up to 1920 x 1440 including native SUN resolutions of 1152 x 900 at a band width of 200 MHz, these devices are compatible with multiple platforms such as SUN, IBM, HP, Dell, Solaris, and Mac, and Windows Vista/2003/XP/2000, Netware, UNIX and Linux.
Since the USB switch only supported VGA video monitors, the DVI KVM Switch was introduced as these displays became more popular. This allows controlling DVI enabled computers with one DVI monitor, USB keyboard and USB mouse. Supporting resolutions of 1600 X 1200 @ 60Hz along with various platforms and operating systems, they are perfect for applications that require mixed analog / digital operation. Other key features are the Auto Scan Mode for monitoring PCs, placement of CPUs away from harsh work environments and LEDs displaying the PC status. Easy to install using plug and play technology, with switching between sources done using RS232, IR remote control or front panel push buttons. The main limitation of these switches is distance, which is restricted by USB cable lengths.
The IP KVM Switch was introduced to overcome this. With the help of this device a user can monitor servers via a 128 bit secure browser from anywhere in the world over TCP/IP. A non-intrusive solution, it allows remote access and control. Compatible with almost all operating systems, these switches have optional 12, 24 and 48 volt DC power. They operate by using microcontrollers and specialized hardware to capture the signals from peripheral devices, compress and convert these into packets, and send them over an Ethernet link to a remote console application that unpacks and reconstitutes the dynamic graphical image. Due to the flexibility of accessing systems remotely, this version of the USB KVM Switch is widely used in surveillance applications.