A kvm extender is used to allow system personnel to control servers from hundreds of feet away. The extenders simply use CAT 5/6/7 cables to extend the kvm switch console. The server can be in one location and the kvm switch in totally different area, which is more suitable to your needs. Access to the servers can thereon be controlled from any location, including a central control room for example. And as usual cable jargon is cleared away.
Many kvm switch manufacturers feature added abilities with their kvm extenders. For example, it is possible to find kvm extenders with multi media support such as when using kvm with audio. Extenders can be fit to almost any size kvm, whether 2 port, 4 port , or higher; once they are attached they allow you the ability to control the computer from afar.
Wireless kvm switches may be an interesting option to consider. Based on the 802.11 a\b\g standard, a wireless kvm extender can let you control your servers from a distant location without having to lay out cables. And with plug and play installation, and encryption for security, the wireless solution is one we will be watching closely in the near future.