Black Box dvi-d catx/fiver kvm extenders, ACS4011A-R2, ACS4002A-R2-MM manual Introduction, Glossary

Chapter 2: Overview

2.1 Introduction

A CATx/Fiber KVM Extender enables you to mount a CPU in a secure rack/cabinet or data center and access it from a remote location, up to 140 meters away. A basic KVM extension system is comprised of a local unit and a remote unit. The local unit connects directly to the computer (or a KVM switch system) using the supplied cable(s). The user console (keyboard, mouse, and monitor) attaches to the remote unit. The remote and local units communicate video and data information along the interconnecting cables. Local units offer dual access, allowing the connection of a second monitor close to the computer.

A CATx/Fiber KVM Extender is used to extend the maximum distance between a CPU and a keyboard/monitor/mouse. In addition, a KVM extender is beneficial in installations in electromagnetic hazardous environments (EMI). Regular KVM extender cables (and extenders using traditional cables) have inherent distance limitations, and EMI interference may reduce the maximum distance and/or reliability. With a DVI-D/-I CATx Extender system, these limitations are no longer an issue.

2.2 Glossary

The following terms are used in this guide:

	Table 2-1. Glossary
Term	Definition
	Any Category 5, 5e, 6, or higher cable, solid 24 AWG. Although flexible 27/7 AWG cables can
CATx	be used too, the lengths of flexible cables count twice in the calculation of the total distance.
Fiber	9-μ Single-mode or 50-μ/62.5-μ Multimode fiber cable.
KVM	Keyboard, video, and mouse.
Console	Keyboard, mouse, and monitor
Dual Access	A system allowing connection of local and remote user consoles.
Single-Head	An extender system that supports one monitor and keyboard/mouse
Dual-Head	An extender system that supports two monitors and keyboard/mouse
	Digital video standard, installed by Digital Display Working Group (www.ddwg.org) R, G, B,
DVI	CLOCK in a data stream with up to 3x 1.6 Gbps. Signals are TMDS Level.
PSU	The desktop power supply connected to the local/remote unit.
	Human interface devices (HIDs) are units which are used for human access to the CPU. They are
	a USB-device class of their own (e.g. memory devices etc.). In addition to keyboards and mice, it
HID	includes touchscreens, light pens, fingerprint sensors, graphics tablets, etc.

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