User guide

Overview 5
1. Overview
Introduction
SDRK KVM Extender Local Hubs enable high-resolution video, PS/2 keyboard
and mouse, stereo audio, and serial port signals to be communicated up to 300m
over Category 5, 5e or higher (CATx) cable.
A basic KVM extension system comprises a Local Unit (transmitter) and a
Remote Unit (receiver). 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 connecting CATx cable
(Figure 1). An SDRK Local Hub combines 6 or 12 Local Units in a rack mount
chassis.
Within the product range, models are available with combinations of the
following:
• Dual access: allowing a second user console at the Local Unit.
• Audio/Serial transmission: bi-directional stereo audio (16-bit digitized) and
transparent serial communication up to 19.2Kbps.
• Serial transmission only: serial COM port for asynchronous RS232 devices
operating at 1200, 9600 or 19,200 bps (8 data bits, no parity, 1 stop bit).
Glossary
The following terms are used in this guide:
CATx
Any CAT5, 5e, 6 or higher cable.
PSU
Power Supply Unit.
KVM
Keyboard, Video and Mouse.
Console
A keyboard, monitor, and mouse, plus optional serial/audio
devices.
Dual Access
A system allowing connection of local and remote user consoles.
Single Head
An extender system that supports one monitor.
Dual Head
An extender system that supports two monitors.
Quad Head
An extender system that supports up to four monitors.