Black Box ServSwitch ACU2001A User manual

SEPTEMBER 2003
ACU2001A
ACU2009A
ACU2022A
ACU2028A
ACU2201A
ACU2222A
ACUR001A
ACUR002A
ACURA001A
ACURA002A

THE SERVSWITCH

FAMILY
1
Welcome to the ServSwitch™ Family!
Thank you for purchasing a BLACK BOX® ServSwitch™ Brand CATx KVM Extender
model! We appreciate your business, and we think you’ll appreciate the many ways that your
enhanced keyboard/video/mouse system will save you money, time, and effort.
That’s because our ServSwitch family is all about breaking away from the traditional,
expensive model of computer management. You know, the one-size-fits-all-even-if-it-doesn’t
model that says, “One computer gets one user station, no more, no less.” Why not a single
user station (monitor, keyboard, and mouse) for multiple computers—even computers of
different platforms? Why not a pair of user stations, each of which can control multiple
computers? Why not multiple user stations for the same computer?
With our ServSwitch products, there’s no reason why not. We carry a broad line of robust
solutions for all these applications. Do you have just two PCs, and need an economical
alternative to keeping two monitors, keyboards, and mice on your desk? Or do you need to
share dozens of computers, including a mix of IBM® PC, RS/6000®, Apple® Macintosh®,
Sun Microsystems®, and SGI™ compatibles among multiple users with different access
levels? Does your switch have to sit solidly on a worktable and use regular everyday cables?
Or does it have to be mounted in an equipment rack and use convenient many-to-one cables?
No matter how large or small your setup is, no matter how simple or how complex, we’re
confident we have a ServSwitch system that’s just right for you.
The ServSwitch™ family from Black Box—the one-stop answer for all your KVM-switching
needs!
This manual will tell you all about your new ServSwitch™ Brand CATx KVM Extender,
including how to install, operate, and troubleshoot it. For an introduction to the Extender, see
Chapter 2. The Extender product codes covered in this manual are:
ACU2001A ACU2022A
ACU2009A ACU2028A
ACU2201A ACU2222A
ACUR001A ACURA001A
ACUR002A ACURA002A

SERVSWITCH

BRAND CATX KVM EXTENDER FAMILY
2
Copyrights and Trademarks
©2003. All rights reserved. This information may not be reproduced in any manner without
the prior written consent of the manufacturer.
Information in this document is subject to change without notice and the manufacturer shall
not be liable for any direct, indirect, special, incidental or consequential damages in
connection with the use of this material.
All trademark and trade names mentioned in this document are acknowledged to be the
property of their respective owners.
Disclaimer
While every precaution has been taken in the preparation of this manual, the manufacturer
assumes no responsibility for errors or omissions. Neither does the manufacturer assume any
liability for damages resulting from the use of the information contained herein. The
manufacturer reserves the right to change the specifications, functions, or circuitry of the
product without notice.
The manufacturer cannot accept liability for damage due to misuse of the product or due to
any other circumstances outside the manufacturer’s control (whether environmental or
installation related). The manufacturer shall not be responsible for any loss, damage, or injury
arising directly, indirectly, or consequently from the use of this product.
Cautions and Notes
The following symbols are used in this guide:

 
  
NOTE. This indicates important information to help you make the best use of
this product.

FCC/CDC STATEMENTS
3
FEDERAL COMMUNICATIONS COMMISSION
AND CANADIAN DEPARTMENT OF COMMUNICATIONS
RADIO-FREQUENCY INTERFERENCE STATEMENTS
This equipment generates, uses, and can radiate radio-frequency energy, and if not installed
and used properly, that is, in strict accordance with the manufacturer’s instructions, may
cause interference to radio communication. It has been tested and found to comply with the
limits for a Class A computing device in accordance with the specifications in Subpart B of
Part 15 of FCC rules, which are designed to provide reasonable protection against such
interference when the equipment is operated in a commercial environment. Operation of this
equipment in a residential area is likely to cause interference, in which case the user at his
own expense will be required to take whatever measures may be necessary to correct the
interference.
Changes or modifications not expressly approved by the party responsible for compliance
could void the user’s authority to operate the equipment.
Shielded PC-equipment cables must be used with this equipment to maintain compliance with
radio frequency energy emission regulations and ensure a suitably high level of immunity to
electromagnetic disturbances.
This digital apparatus does not exceed the Class A limits for radio noise emission from digital
apparatus set out in the Radio Interference Regulation of the Canadian Department of
Communications.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites
applicables aux appareils numériques de la classe A prescrites dans le Règlement sur le
brouillage radioélectrique publié par le Ministère des Communications du Canada.

SERVSWITCH

BRAND CATX KVM EXTENDER FAMILY
4
EUROPEAN UNION DECLARATION OF CONFORMITY
WARNING!
This is a class A product. In a domestic environment, this product may cause radio
interference, in which case the user might be required to take adequate remedial
measures.
This product complies with the following harmonized standards:
EN55022 (1998), EN55024 (1998), EN61000-4-2 (1995),
EN61000-4-3 (1995), EN61000-4-4 (1995),
EN61000-4-5 (1995), EN61000-4-6 (1996),
EN61000-4-11 (1994), EN60950 (2000)
When used in environments that have high levels of electromagnetic interference, you may
experience some slight disturbance in its operation. If this occurs, please refer to the
Troubleshooting section of the User Guide for further information, or contact Technical
Support.
To maintain compliance use only cables supplied (or recommended) for use with this product.

NOM STATEMENT
5
NORMAS OFICIALES MEXICANAS (NOM)
ELECTRICAL SAFETY STATEMENT
INSTRUCCIONES DE SEGURIDAD
1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de que el
aparato eléctrico sea operado.
2. Las instrucciones de seguridad y operación deberán ser guardadas para referencia futura.
3. Todas las advertencias en el aparato eléctrico y en sus instrucciones de operación deben
ser respetadas.
4. Todas las instrucciones de operación y uso deben ser seguidas.
5. El aparato eléctrico no deberá ser usado cerca del agua—por ejemplo, cerca de la tina de
baño, lavabo, sótano mojado o cerca de una alberca, etc..
6. El aparato eléctrico debe ser usado únicamente con carritos o pedestals que sean
recomendados por el fabricante.
7. El aparato eléctrico debe ser montado a la pared o al techo sólo como sea recomendado
por el fabricante.
8. Servicio—El usuario no debe intentar dar servicio al equipo eléctrico más allá a lo
descrito en las instrucciones de operación. Todo otro servicio deberá ser referido a
personal de servicio calificado.
9. El aparato eléctrico debe ser situado de tal manera que su posición no interfiera su uso.
La colocación del aparato eléctrico sobre una cama, sofá, alfombra o superficie similar
puede bloquea la ventilación, no se debe colocar en libreros o gabinetes que impidan el
flujo de aire por los orificios de ventilación.
10. El equipo eléctrico deber ser situado fuera del alcance de fuentes de calor como
radiadores, registros de calor, estufas u otros aparatos (incluyendo amplificadores) que
producen calor.
11. El aparato eléctrico deberá ser connectado a una fuente de poder sólo del tipo descrito en
el instructivo de operación, o como se indique en el aparato.
12. Precaución debe ser tomada de tal manera que la tierra fisica y la polarización del equipo
no sea eliminada.
13. Los cables de la fuente de poder deben ser guiados de tal manera que no sean pisados ni
pellizcados por objetos colocados sobre o contra ellos, poniendo particular atención a los
contactos y receptáculos donde salen del aparato.

SERVSWITCH

BRAND CATX KVM EXTENDER FAMILY
6
14. El equipo eléctrico debe ser limpiado únicamente de acuerdo a las recomendaciones del
fabricante.
15. En caso de existir, una antena externa deberá ser localizada lejos de las lineas de energia.
16. El cable de corriente deberá ser desconectado del cuando el equipo no sea usado por un
largo periodo de tiempo.
17. Cuidado debe ser tomado de tal manera que objectos liquidos no sean derramados sobre
la cubierta u orificios de ventilación.
18. Servicio por personal calificado deberá ser provisto cuando:
A: El cable de poder o el contacto ha sido dañado; u
B: Objectos han caído o líquido ha sido derramado dentro del aparato; o
C: El aparato ha sido expuesto a la lluvia; o
D: El aparato parece no operar normalmente o muestra un cambio en su desempeño; o
E: El aparato ha sido tirado o su cubierta ha sido dañada.

SAFETY PRECAUTIONS AND INSTALLATION GUIDELINES
7
Safety Precautions and Installation Guidelines
To ensure reliable and safe long-term operation please note the following installation
guidelines:
• Do not use to link between buildings.
• Only use in dry, indoor environments.
• If the building has 3-phase AC power, try to ensure that equipment connected to the
Local and Remote units is on the same phase.
• Try not to route the CATx link cable alongside power cables.
• Ensure that the system connected to the Local unit is connected to power ground.
• Ensure that the monitor connected to the Remote unit is connected to power ground and
does not use an isolated power supply.
• The Remote unit and any power supplies can get warm. Do not situate them in an
enclosed space without any airflow.
• Do not place the power supply directly on top of the Remote unit.
• Do not obscure the Remote unit’s ventilation holes.
 
!
 "
•   
#$
 $
 

•  

% &
 
• $%
'%()*+,-

 %!

SERVSWITCH

BRAND CATX KVM EXTENDER FAMILY
8
Contents
1. Quick Setup 10
1.1 Command Summary 11
2. Overview 12
2.1 Introduction 12
2.2 Glossary 12
2.3 Features 14
2.4 Product Range 15
2.5 Compatibility 16
2.6 How to Use This Guide 17
3. Installation 18
3.1 Package Contents 18
3.2 Interconnection Cable Requirements 19
3.3 Remote Unit Installation 20
3.4 Local Unit Installation 22
3.5 Connection to Rackmount Hub Local Units 25
4. Remote Unit Configuration & Operation 28
4.1 Video Configuration Overview 28
4.2 Video Adjustments 29
4.3 Command Mode 30
4.4 Adjusting Video 31
4.5 Other Remote Configuration & Operation Options 36
5. Local Unit Operation 39
5.1 Overview 39
5.2 Dual Access Systems 40
6. Troubleshooting 42
6.1 Video 42
6.2 Keyboard & Mouse 44
6.3 Audio 45
6.4 Serial 45
6.5 General Questions 46

CONTENTS
9
Appendix A: Example Applications 47
Appendix B: Rack Mount Options 52
Appendix C: Remote Unit: Flash Upgrading &
External Configuration 54
Appendix D: Advanced Cabling Issues (Skew) 55
Appendix E: Audio/Serial Ports 58
Appendix F: Calling Black Box 60
Appendix G: Specifications 61

SERVSWITCH

BRAND CATX KVM EXTENDER FAMILY
10
1. Quick Setup
This section briefly describes how to install your KVM extender system and optimize the
video signals. Unless you are an experienced user, we recommend that you follow the full
procedures described in the rest of this manual. Refer to the command summary on the next
page when following this procedure.
.
Install system
1. Connect Remote unit to KVM and audio/serial devices
(if present).
2. Connect Local unit or Extender hub to CPU.
3. Connect Remote and Local units with compatible CATx
Interconnect cable.
4. Power up system.
Any Problems? See
Installation and
Troubleshooting
sections.
View Test Card
http://www.blackbox.com/tech_support/ts_upgrades/ts_ss.html
Enter Command Mode on Remote unit
<Left Control> + <Left Shift> + <F10>
Choose video channel
<1>, <2> or <0> (both)
Apply Assisted EQ
Next: <Left Control> + <Page Up>
Previous:
<Left Control> + <Page Down>
Reset channel
<Left Control> + <Home>
Correct Skew
Adjust the individual color delays until the test card’s RGB
vertical lines are aligned.
Fine tune LF and HF EQ
Reduce smearing and loss of sharpness.
TFT Users: Set to auto-adjust, or if you are an advanced
user, manually adjust the monitor’s clock and phase.
Exit Command Mode
<ESC>
More channels?
Yes
No
Provides useful
image for adjusting
video.
Obtain approx. EQ
setting. See page 28.
All adjustments apply
to selected channel.
See page 27.
See page 28
and, for
a detailed discussion
of skew correction,
see Appendix D.
Optimize video quality.
See page 30.

QUICK SETUP
11
1.1 Command Summary
The following table summarizes the ‘hot’ key command sequences used in system
configuration and video tuning on a Remote unit console.
Command Mode
Enter Command Mode
Exit Command Mode & Save
Exit Command Mode Without Save
<Left Control> + <Left Shift> + <F10>
<ESC>
<Left Control> + <ESC>
Video Channel Selection
Select Channel For Adjustment
Select BOTH Video Channels
<1>, <2>
<0>
Assisted EQ
Next Assisted EQ Setting
Previous Assisted EQ Setting
Reset EQ & Delay Values
Reset EQ Values
<Left Control> + <Page Up>
<Left Control> + <Page Down>
<Left Control> + <Home>
<Left Control> + <End>
LF/HF Equalization
Increase LF Equalization (Coarse)
Increase LF Equalization (Fine)
Decrease LF Equalization (Coarse)
Decrease LF Equalization (Fine)
Increase HF Equalization (Coarse)
Increase HF Equalization (Fine)
Decrease HF Equalization (Coarse)
Decrease HF Equalization (Fine)
<L> + <Up Arrow>
<L> + <Right Arrow>
<L> + <Down Arrow>
<L> + <Left Arrow>
<H> + <Up Arrow>
<H> + <Right Arrow>
<H> + <Down Arrow>
<H> + <Left Arrow>
Quick Skew
Toggle RED Delay (19nS)
Toggle GREEN Delay (19nS)
Toggle BLUE Delay (19nS)
<Left Control> + <R>
<Left Control> + <G>
<Left Control> + <B>
Delay (Skew)
Increase RED Delay
Increase GREEN Delay
Increase BLUE Delay
Decrease RED Delay
Decrease GREEN Delay
Decrease BLUE Delay
<R> + <Right Arrow>
<G> + <Right Arrow>
<B> + <Right Arrow>
<R> + <Left Arrow>
<G> + <Left Arrow>
<B> + <Left Arrow>
Reset Commands
Reset Mouse and Keyboard
Send NULL Mouse Byte
Set Extender To Default State
<F1>
<F3>
<Left Control> + <F9>
Other Commands
Toggle Remote Unit Private Mode
Toggle Local Unit Initial Hot Key
Local Unit Scroll Lock Key Mode
<Scroll Lock>
<F7>
<F5>

SERVSWITCH

BRAND CATX KVM EXTENDER FAMILY
12
2. Overview
2.1 Introduction
The ServSwitchBrand CATx KVM Extender Series enables high-resolution video, PS/2
keyboard and mouse, stereo audio, and serial port signals to be communicated up to 1000ft
(300m) over Category 5, 5e, 6 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 (see Figure 1).
Within the product range, models are available with combinations of the following:
• Audio transmission: bi-directional stereo audio (16-bit digitized).
• Serial transmission: transparent serial COM port (to 19.2Kbps).
• Dual access: allowing a second user console at the Local unit.
• Multiple video channels: single and dual video heads.
2.2 Glossary
The following terms are used in this guide:
CATx Any Category 5, 5e, 6 or higher cable.
PSU The desktop power supply connected to the Remote 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.

OVERVIEW
13
Figure 1 KVM extender system
Local Access
ACU2009A, ACU2028A only.
Dual Video Support
ACU2201A, ACU2222A
ACUR002A, ACURA002A
only
Serial and Audio
Transmission
ACU2022A, ACU2028A
ACU2222A, ACURA001A
ACURA002A only
KVM extension over CATx
cables up to 1000ft (300m).
LOCAL unit
REMOTE unit

SERVSWITCH

BRAND CATX KVM EXTENDER FAMILY
14
2.3 Features
All members of the ServSwitchBrand CATx KVM Extender Series offer the following
features:
• Support for high video resolution over extended distances:
1600x1200@60Hz over 650ft (200m)
1280x1024@75Hz over 1000ft (300m)
• Fully integrated skew compensation allows operation with CATx cables by canceling
color shift and enhancing sharpness.
• Independent low frequency (LF) and high frequency (HF) cable equalization control
ensures optimum video tuning across different cable types.
• Models available with single and dual head video support (one CATx cable required for
each video channel).
• All control and video tuning carried out using the Remote keyboard with settings stored
in EEPROM memory.
• Remote unit firmware and settings flash upgradeable.
• Intelligent PS/2 keyboard and mouse emulation ensures PCs do not lock-up and allows
peripherals to be hot-plugged.
• Dual access models allow local or remote operation.
• Transparent serial port (on certain models) enables any serial device to be extended (up
to 19.2K Baud). The serial port may be used to extend one device (requiring
handshaking lines), or up to three simple serial devices (no handshaking).
• Bi-directional stereo audio (16-bit digitized) support on certain models enables high-
quality, low-noise audio extension.
• Local units are normally powered directly by the PC (or switch).
• Private Mode on dual access models allows user to lock out other console.
• Status indicator LEDs on each RJ45 port.
• Small footprint chassis.
• Rack mount options available.
• Surge protection on each RJ45 port.
• Remote units are fully compatible with ServSwitchCAT5 KVM Extender Local units
and hubs.
• CPU cables included (certain models).

OVERVIEW
15
2.4 Product Range
There are ten products in the range:
Single Video Channel Kits (Standard)
ACU2001A Single Video Channel, PS/2 KB & Mouse
Local Unit + Remote Unit (Single Access)
ACU2009A Single Video Channel, PS/2 KB & Mouse
Local Unit + Remote Unit (Dual Access)
Single Video Channel Kits (Audio)
ACU2022A Single Video Channel, PS/2, Serial, Stereo Audio
Local Unit + Remote Unit (Single Access)
ACU2028A Single Video Channel, PS/2, Serial, Stereo Audio
Local Unit + Remote Unit (Dual Access)
Dual Video Channel Kit (Standard)
ACU2201A Dual Video Channel, PS/2 KB & Mouse
Local Unit + Remote Unit (Dual Video)
Dual Video Channel Kit (Audio)
ACU2222A Dual Video Channel, PS/2, Serial, Stereo Audio
Local Unit + Remote Unit (Dual Video)
Remote Units With PS/2 Interfaces
ACUR001A Single Video Channel, PS/2 KB & Mouse
ACUR002A Dual Video Channel, PS/2 KB & Mouse
Remote Units With PS/2, Serial and Audio Interfaces
ACURA001A Single Video Channel, PS/2, Serial, Stereo Audio
ACURA002A Dual Video Channel, PS/2, Serial, Stereo Audio

SERVSWITCH

BRAND CATX KVM EXTENDER FAMILY
16
2.5 Compatibility
Interface Compatibility
• PS/2 Keyboard: Compatible with all standard keyboards. Certain keyboards with
enhanced features may also be supported with custom firmware.
• PS/2 Mouse: Compatible with all standard 2-button, 3-button and wheel mice. To
connect to a PC which does not have a PS/2 mouse port, an active serial converter is
required – Model No: AC244A.
• Audio: Input and output are line-level. Amplified speakers are required. A micro- phone
may be directly connected to the Remote unit (optional pre-amplification).
• Serial: Transparent up to 19.2K Baud (38.4K operation may be possible with some
devices). The following serial signals are extended: TX, RX, RTS, CTS, DTR, DSR. In
rare cases, a wiring adaptor may be required to transfer RI and DCD.
• Video: VGA to UXGA. Separate sync, composite sync, or sync-on-green. Maximum
resolution and refresh rates depend on cable length and cable type (see Appendix G:
Specifications, page 61).
Extender Compatibility
The ServSwitchBrand CATx KVM Extender Series of CATx KVM extender products
offer enhanced performance while maintaining complete compatibility with existing
ServSwitchstandalone and rack mount CAT5 extenders.
You can use CAT5 and CATx products belonging to the same family in any combination.
However, it is not possible to mix Standard and Audio products within a system. CATx units
are not currently compatible with SUN (ACU1004A, ACU1005A) or Serial only products
(ACU1002A, ACU1008A, ACUSREM, ACU1006SRA).
Standard Family Audio Family
Standard family units are compatible
with the following CAT5 products: Audio family units are compatible with the following CAT5 products:
ACU1001A ACU1009A ACU1022A ACU1028A
ACU3001A ACU3009A ACU3022A ACUVREM
ACU1049A ACUMREM ACUWREM ACU1006VRA
ACUREM ACUREMSW ACU1006DVRA ACU1006MRVA
ACU1006RA ACU1006DRA
ACU1012RA ACU1006MRA

OVERVIEW
17
2.6 How to Use This Guide
This guide describes the installation and configuration of the ServSwitchBrand CATx
KVM Extender Series. Although the connection and operation of the system is relatively
straightforward, you should consider the following before getting started:
Connection & Compatibility
If you have purchased an Extender Kit, this will contain all the cables required to connect the
Local unit to your PC or KVM switch. The Remote console (keyboard, monitor and mouse)
and any audio and serial equipment connects directly to the Remote unit.
If you have purchased a Remote Unit, ensure that it is compatible with your Local unit (see
Compatibility, page 16).
For information about connection and installation, see Installation, page 18.
Interconnection Cable
You will need CATx (any category 5, 5e, 6 or higher) cable, terminated with RJ45 plugs, to
connect the Local and Remote units (see Interconnection Cable Requirements, page 19.
Adjusting Video
Video signals become distorted when transmitted over CATx cables. To get the best from
your extender system, it is essential that you adjust the Remote unit to optimize the video
image quality:
• For experienced users, there is a Quick Setup section at the start of this guide (see page
10).
• For the full procedure, see Remote Unit Configuration & Operation, page 28.
• Refer to Appendix D: Advanced Cabling Issues (Skew), page 55 for a more in depth
discussion of skew correction and advanced cabling issues.

SERVSWITCH

BRAND CATX KVM EXTENDER FAMILY
18
3. Installation
For first-time users, we recommend that you carry out a test placement, confined to a single
room, before commencing full installation. This will allow you to identify and solve any
cabling problems, and experiment with the KVM extender system more conveniently.
3.1 Package Contents
You should receive the following items in your extender package. If anything is missing,
please refer to Appendix F to obtain Technical Support.
• Extender Remote unit.
• 9-VDC 10W universal power supply for Remote unit.
• Extender Local unit.
Only included in extender kits.
• KVM CPU cable set (1.8m) with PS/2 (6-pin mini-DIN male-to-male) keyboard and
mouse connectors and VGA video (HD15 male to female) connector.
Models: ACU2001A, ACU2009A, ACU2022A and ACU2028A only.
• KVM CPU combination cable (1.0m) with PS/2 (6-pin mini-DIN male-to-male)
keyboard and mouse connectors, VGA video (HD15 male) connector, and 25-way
(DB25 Female) extender connector.
Models: ACU2201A and ACU2222A only.
• CPU video cable (1.0m) with VGA video (HD15 male) connector and a 25-way (DB25
Female) extender connector.
Models: ACU2201A and ACU2222A only.
• Serial cable (1.8m, one DB9 male connector, one DB9 female connector, straight-
through connections).
Models: ACU2022A, ACU2028A and ACU2222A only.
• Two audio cables (1.8m, 3.5mm stereo plugs).
Models: ACU2022A, ACU2028A and ACU2222A only.
• IEC AC Power Cord.
• User Guide.

INSTALLATION
19
3.2 Interconnection Cable Requirements
To connect the Local and Remote units you will need CATx (any category 5, 5e, 6 or higher)
cable terminated with RJ45 plugs.
Interconnect cables must be solid-core type. Stranded patch cable will give poor results over
longer distances. The pairing of the cable and pinning of its connectors should normally be in
accordance with EIA-568B (see page 56).
One CATx cable is required for each video channel.
• The Primary interconnect cable connects INTERCONNECT Port 1 on the Local and
Remote units. This carries the main video channel and all data (plus audio/serial).
• A Secondary CATx cable (connected to INTERCONNECT Port 2) carries a second
video channel on dual-head units.
In order to send Keyboard, Mouse, Audio and Serial signals to the PC, the
Primary interconnect must be connected.
The Primary interconnect does not have to be connected in order to use the
keyboard attached to the Remote unit for setup. However, if the Primary
interconnect is disconnected, the keyboard cannot be used for configuration for 15
seconds after disconnection (to maintain data integrity).
With some cables, video performance may be improved by using a crossover patch
cable at each end or an alternative RJ45 pin-out (see Appendix A: Example
Applications, page 55).