Black Box ACU5002A, ACU5001A User Manual

ServSwitch

®

NETWORK SERVICES

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February2010

ACU5001A
ACU5002A

™

CX Extenders

CUSTOMER

SUPPORT

INFORMATION

Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500)
FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax [phone]
Mailing address: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: [e-mail]

®

Contents

Welcome

Introduction .................................................................................2

Installation & Operation

Connections .................................................................................4

Cable length advice
Connections at the SAM (local) unit
Connections at the CX Remote module

Operation .....................................................................................8

General use
Locking and unlocking the system

.............................................................................8

................................................................4

......................................5

................................6

........................................8

Special configuration

Configuration ..............................................................................9

What are hotkeys?

Entering, using and exiting configuration mode
Password setting
Hot plugging and mouse restoration

Which restore setting do I use?
Microsoft and Logitech -specific mouse settings
Video compensation (sharpness and brightness)
Miscellaneous settings

Performing flash upgrades

.............................................................9

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................12

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Further information

Getting assistance ......................................................................15

Safety information
Radio Frequency Energy
Certification notice for equipment used in Canada
Normas Oficiales Mexicanas (NOM

Instrucciones de seguridad

BlackBox subsidiary contact details

....................................................................15

............................................................16

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)

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Welcome

PC

USB

VIDEO

PS/2 KEYBOARD

PS/2 MOUSE

PSU

CX Remote

SAM

Introduction

Thank you for choosing the ServSwitch CX extender
set from Black Box. These compact modules allow
you to place the controlling keyboard, video
monitor and mouse up to 328 feet (100 metres)
from a computer system.

Two types of CX extender sets are avilable:
ACU5001A for PS/2-style keyboard and mouse
connections and ACU5002A for USB-style
connections. The long distance link between the
modules is made via Category 5, 5e or 6 twisted
pair cabling.

The SAM (Server Access Module)
connects to the video, mouse
and keyboard ports of the host
computer. Power for the SAM
is derived from the computer
keyboard (or USB) connection.

Up to 100 metres
separation between
the local and remote
modules via a single
Category 5, or higher,
cable

Special circuitry within the remote module allows
you to make adjustments to the sharpness and
brightness settings to suit your own preferences.

The video monitor, mouse
and keyboard connect to the
CX Remote module.

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Supplied items

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724-746-5500

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Remote Module

Computer Access Module (SAM)ServSwitch CX

Package variants

ACU5001A For analogue video plus PS/2-style keyboard and mouse connections
ACU5002A For analogue video plus USB-style keyboard and mouse connections

Power adapter
and country­specific power
lead

Four self-adhesive

rubber feet

CD-ROM

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Installation & Operation

Connections

Installation of the ServSwitch CX extender set is straightforward and minimal
configuration requirements in most cases. The moulded SAM (Server Access
Module) connects directly to the system, while the CX Remote module is at the
other end of the twisted pair cable and attaches to the keyboard, mouse, etc.

• Connections at the SAM (local) unit

• Connections at the X100 (remote) module

Cable length advice

The ServSwitch CX extender set supports twisted-pair structured cabling within
categories 5, 5e and 6. Of these three cable types, category 5 generally provides
the best transmission of video signals because its four pairs of conductors are
the most evenly twisted.

Category 5e and 6 cables use conductor pairs that are unevenly twisted in order
to combat interference effects encountered within higher frequency networks.
While these uneven twists work well for Ethernet signals, they can impose
problems for the video signals transceived by the CX extender modules. The
CX extender modules send the red, green and blue video signals on separate
twisted pairs within the cable. If any of the colour signals are made to travel
slightly further or shorter distances than the others, the result is seen as mis­aligned colours on screen. This is called skew and becomes more noticeable as
cable runs become longer and screen resolutions/refresh rates increase.

As an approximate guide, you should expect the following maximum cable
lengths (achievable at resolutions up to 1600 x 1200 @ 60Hz):

Category 5 Category 5e or 6

100m ¹ 50 to 100m ¹
¹ length limited by skew in the cable.

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Connections at the SAM (local) unit

1 Where possible ensure that power is disconnected from the system to be

connected.

(Note: If it is not possible to switch off devices prior to connection, then
a ‘Hot plug’ procedure is available – see the Hot plugging and mouse

restoration section for more details).

2 Locate the required SAM and attach its video, keyboard and mouse (PS/2-

style or USB) connectors to the relevant sockets on the computer system.

4 Attach the connector of the cable run to the socket of

the SAM. The other end of the cable run will attach to
the CX Remote module.

Green indicator - power present

Yellow indicator - signal activity

The SAM provides
analogue video, plus
either PS/2-style or
USB-style keyboard and
mouse connections to
the host computer

USB keyboard/mouse

PS/2-style mouse

PS/2-style keyboard

Video

3 Lay a suitable length of category 5, 5e or 6 cabling between the computer

system and the remote peripherals - see Cable length advice.

Category 5, 5e or 6 cable

to X100 module

Computer

Access

Module

Note: SAMs derive power from the
computer system via either the PS/2-style
keyboard connector or USB connector.

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Connections at the CX Remote module

724-746-55 00

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5500

1 Place the CX Remote module adjacent to the remote user location.
2 Attach the video monitor, keyboard and mouse connectors to the sockets of

the CX Remote module.

From mouse

From keyboard

From video monitor

CX Remote

module

3 Attach the connector of the cable run leading from the SAM to the

TO LOCAL socket of the CX Remote module.

Category 5, 5e or 6

cable leading to the

SAM module

CX Remote

From

power

adapter

module

4 Insert the output connector of the power supply into the socket at the front

edge of the X100 module labelled POWER.

5 Insert the IEC connector of the supplied power lead into the corresponding

socket of the power supply. Connect the other end of the power lead to a
nearby mains socket.

6 Where necessary, use the in-built video compensation feature to eliminate

any effects caused by the cable run. See Video compensation for details.

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1

ON

4

2

3

1

ON

4

2

3

ON

CX Remote module switches

Certain aspects of operation can be affected by the switches on the CX Remote
module.

Determines configuration
of hotkeys in conjunction
with switch 3

Reserved for

OFF: Normal operation
ON: Flash upgrade

Determines configuration
of hotkeys in conjunction
with switch 2

future use

Switch 1

OFF: Normal operation.
ON: (Before power is applied) Places the CX Remote module into flash upgrade

mode so that the internal software can be changed. Please see the Flash

upgrade section in the ‘Special configuration’ chapter.

Switches 2 and 3

Switches 2 and 3 determine which two keyboard keys (when pressed in unison)
are to be designated as ‘hotkeys’. Hotkeys signal to the CX Remote module that
the next key to be pressed is a special configuration command for the module
and is not to be passed to the computer system.

2 OFF
3 OFF Hotkeys = CTRL and SHIFT

Note: When shipped, all switches are set in the OFF positions and this will
produce normal operation.

2 OFF
3 ON Hotkeys = ALT and SHIFT

2 ON
3 OFF Hotkeys = CTRL and ALT

2 ON
3 ON Hotkeys disabled

Switch 4

This switch is reserved for future use.

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Operation

Num

Lock

Caps

Lock

Scroll

Loc

k

General use

In use, the CX Remote modules should be transparent - the system and its
peripherals should operate exactly as normal, the only difference being that they
are now up to 100 metres apart.

In some installations, you may see some ‘shadows’ to the right of high contrast
screen characters. This can be caused by an incorrectly selected sharpness setting
and it may be necessary to make adjustments to correct this. Please see Video

compensation - sharpness and brightness in the ‘Special configuration’

section.

Locking and unlocking the system

In situations where the computer system (and its local SAM) can be locked away
the CX Remote modules offer a viable security system to deter unauthorised use.
Once a password has been set, a simple key sequence allows the system to be
quickly and securely detached from its peripherals. Only the correct password
will reconnect the remote and local modules.

To lock the system

1 First set a password. For further details, please refer to the Password

setting section in the ‘Special configuration’ chapter.

2 Simultaneously press the currently configured hotkeys (by default, and

) along with .

The screen will go blank and the three keyboard
indicators will begin alternately flashing between the
‘Num Lock’ and ‘Scroll Lock’, and ‘Caps Lock’. This
sequence indicates that a password is required.

To unlock the system

1 Enter the correct password and press .

Note: Passwords are NOT case sensitive.
Note: If an invalid password has been entered and the keyboard indicators

are not flashing as described above, press to clear the incorrect attempt.

2 If the correct password is entered, the screen will be restored and normal

operation can continue.

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To enable the video

Simultaneously press the currently configured hotkeys (by default, and )
long with . This command will be required to restore the video if and
along with is used when no password has been set.

To disable the video

special

configuration

Simultaneously, press the currently configured hotkeys (by default, and )
along with .

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Special configuration

Num

Lock

Caps

Loc

k

Scroll

Lock

Num

Lock

Caps

Loc

k

Scroll

Loc

k

Configuration

You can alter the way that the ServSwitch CX extender modules operate to suit
your requirements. This is done using the Configuration mode and you can
affect the following settings:

• Password setting – allows you to lock the remote module to prevent
unauthorised system access.

• Mouse restoration and settings – allows you to restore mouse operation
and also to change the mouse type.

• Video compensation - sharpness & brightness – allows you to manually
adjust the video image to ensure that it is crisp and bright.

• Miscellaneous settings – report firmware version and restore settings.

What are hotkeys?

Hotkeys are two normal keyboard keys that, when pressed simultaneously with
a third key, signal to the modules that you are sending a message specifically to
them and not to the computer. The hotkeys are ordinarily and , while a
third keypress determines what you want the modules to do.

If the standard and hotkeys are also needed for computer tasks, you
can change them for another combination using switches 2 and 3 on the CX
Remote module:

2 OFF
3 OFF Hotkeys = and (default setting)

2 OFF
3 ON Hotkeys = and

2 ON
3 OFF Hotkeys = and

2 ON
3 ON Hotkeys disabled

Entering, using and exiting configuration mode

To enter and use configuration mode:

1 Simultaneously press the currently configured

hotkeys (by default, and ) along with .

The three keyboard indicators (‘Num Lock’, ‘Caps

Lock’ and ‘Scroll Lock’) will now begin to flash in
sequence to show that you are in configuration
mode.

2 Press the first letter of the required configuration

option, for instance .

All three keyboard indicators will illuminate
continuously.

3 Press the number of the required configuration

option, for instance .

The ‘Scroll Lock’ indicator will extinguish, leaving
the ‘Num Lock’ and ‘Caps Lock’ indicators lit.

4 Press to confirm your option.

The three keyboard indicators (‘Num Lock’, ‘Caps
Lock’ and ‘Scroll Lock’) will now begin to flash in
sequence again.

To exit from configuration mode:

1 Within configuration mode, the three keyboard indicators should be flashing

in sequence to show that the module is ready to receive a new command.

2 Press .

The three indicators will return to their normal states.

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Password setting

Password protection allows you restrict access to the system only to authorised
personnel. A password first needs to be set and then, using the keyboard
attached to the CX Remote module, a simple key sequence allows the system to
be quickly and securely detached from its peripherals.

To set a password

1 Simultaneously, press the hotkeys (by default, and ) along with

to enter configuration mode.

2 Press followed by .
3 Now enter your new password, within the following constraints:

• Passwords are NOT case sensitive,

• Passwords may be any length from one character to a maximum of forty
characters,

• The following keys may NOT be used: , , , or

4 When you have entered the password, press to signal its completion.
5 Press once more to exit configuration mode.

For full details about how to lock and unlock the system using your password,
please see the Locking and unlocking the system section in the ‘Installation
and operation’ chapter.

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Hot plugging and mouse restoration

It is strongly recommended that you switch off the computer system before
attempting to connect it via the ServSwitch CX extender modules. However,
if this is not possible then you need to ‘hot plug’ the ServSwitch CX extender
modules while power is still applied to the system. There is not normally a
danger of damage to the system, however, when mouse communications
are interrupted, often they fail to reinitialise when reconnected. The modules
provide a feature to reinstate mouse communications once the necessary
connections have been made.

There are two main types of data formats used by current PC mice, these are
the older ‘PS/2’ format and the more recent ‘IntelliMouse®’ format introduced
by Microsoft. These use slightly different data arrangements and it is important
to know which type was being used before you hot-plugged the ServSwitch CX
extender modules. The previous setting depends both on the type of mouse and
the type of driver as various combinations of PS/2 and Intellimouse are possible.
Using the incorrect restore function may produce unpredictable results and
require the system to be rebooted.

Which restore setting do I use?

The general rule is that unless both the mouse and the driver are both
Intellimouse compatible then you need to restore the mouse as ‘PS/2’.

Recognising an Intellimouse-style mouse

The Intellimouse format was introduced to support, among other features, the
scroll wheel function. If your mouse has a scroll wheel, then it is likely to support
the Intellimouse format. If you have a Microsoft mouse, then it will usually state
that it is an Intellimouse on its underside label.

Recognising an Intellimouse driver

Before hot plugging your ServSwitch CX extender modules (or afterwards
using only keyboard control), access the Windows Control Panel and select
either the Mouse option (on Windows NT, 2000 and XP) or the System option
(on Windows 95, 98, ME). Look for the name of the driver, which will usually
include the words PS/2 or Intellimouse.

To restore mouse operation when hot plugging:

1 Carefully connect the ServSwitch CX extender modules to the system and its

keyboard, mouse and monitor.

2 Simultaneously, press the hotkeys (by default,

to enter configuration mode.

3 Enter the appropriate restore function code:

• PS/2 – press

• IntelliMouse – press
4 To exit configuration mode, press .
5 Move the mouse a short distance and check for appropriate on-screen

cursor movement. If the mouse cursor darts erratically around the screen,
then cease moving the mouse. This is an indication that the chosen restore
function is incorrect. Try again using the other restore function.

Note: The restore functions predict the likely mouse resolution settings but
may not restore the exact speed or sensitivity settings that were originally
set.

and ) along with

Microsoft and Logitech -specific mouse settings

In certain installations some Logitech mouse drivers may lose the action of the
mouse buttons when used with the standard ‘Microsoft compatible’ signalling
protocol used between the modules. To solve this problem, select the ‘Logitech
compatible’ mouse signalling protocol.

To change mouse signalling protocols

1 Simultaneously, press the hotkeys (by default, and ) along with

to enter configuration mode.

2 Enter the appropriate protocol code:

• Microsoft compatible – press

Logitech compatible – press

•

3 To exit configuration mode, press

.

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Video compensation (sharpness and brightness)

Using the in-built controls you can adjust the picture sharpness and brightness
to improve the remote picture quality.

Video compensation is best carried out when viewing high contrast images with
vertical edges, such as black lines on a white background. When doing so, if
you notice that the screen image is ‘fuzzy’ or ‘dark’ then the image controls
may not be able to solve this condition.

To d i sp l ay a s ui t ab l e h ig h c o nt r as t im ag e

The best way to clearly view the effect of sharp­ness and brightness adjustments is to display a
high contrast image, with vertical edges, on the
screen.

• Open a word processor, type the capital letter
‘H’, or ‘M’ and increase the point size to 72
or higher. For best results, the background
should be white and the character should be
black.

High contrast
black character
on white
background

• A BLACK shadow on the right of the character
indicates UNDER compensation.

• A WHITE shadow on the right of the character indicates OVER
compensation.

Note: The Word processor method is accurate and quick. However, for the very
finest video compensation, use the latest Black Box “skew” test pattern
program which shows both the skew pattern and a section of mixed size Hs
(black on white and white on black).

Black or bright
white shadow
on the right
indicates
the need for
sharpness
adjustment

To a p pl y r em ot e u s er vi d eo co m pe n sa t io n

1 On the keyboard that is connected to the CX Remote module,

simultaneously, press the hotkeys (by default, and ) along with to
enter configuration mode.

The three keyboard indicators (‘Num Lock’, ‘Caps
Lock’ and ‘Scroll Lock’) will now begin to flash in
sequence. The speed of the sequence indicates the
level of the sharpness adjustment currently applied:
the slower the rate, the lower the level of sharpness
being applied.

2 While viewing the displayed screen image, use the following keys to adjust

the controls:
Sharpness:

for fine adjustment, for coarse adjustment.
There are 255 sharpness levels (one coarse step jumps 10 levels).
To a ut os et s ha rpnes s: Press

to make the module
calculate and apply an automatic compensation level - you can
use this as a starting point for your fine tuning.

Note: If the monitor goes blank and switches off (due to oversetting
the sharpness adjustment) press the Home key to restore.

Brightness:

for adjustment. There are 255 brightness levels.

Restore default
sharpness and
brightness
settings

Sharpness
increase
(coarse)

Sharpness
decrease
(coarse)

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Exit image
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and save
settings

Sharpness
increase
(fine)

Brightness
increase

special

configuration

Sharpness

Brightness
decrease

3 When no shadows are visible and the displayed images have crisp edges,

press to exit configuration mode and permanently save all settings.
The new compensation settings will be stored, even when power is removed

or if a complete reset is initiated. These settings should not require further
changes unless the cabling arrangements are altered.

decrease
(fine)

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Miscellaneous settings

The following are configuration settings within the modules that are not covered
in other sections of this guide. These can be achieved once within configuration
mode by pressing the indicated keys:

Report firmware version -

Before initiating this command, ensure that the system is running an application
that can display typed keys as screen characters - e.g. a word processor
or Windows Notepad. The current firmware version will be written to the
application in the form of the letter ‘V’ followed by three numbers - for example
V201 means version 2.01.

Reset all configuration options to default states -

Returns all user configurable options to the settings that are installed at
manufacture. The password will be cleared, however, any current image control
settings or skew adjustments will not be reset.

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Performing flash upgrades

The CX Remote module and SAM are fully reconfigurable via flash upgrades
using the KVM Firmware Uploader utility.

During the upgrade you will be required to connect the CX Remote module
directly to a computer system using a special cable. The upgrade utility will
update the firmware of the CX Remote and also temporarily transform it so that
it can update the SAM unit. Once completed, the CX Remote will return to its
normal operation.

The KVM Firmware Uploader utility is available from Black Box and allows you
to check the current revision of the CX Remote firmware. Full instructions are
provided with the download file.

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Further information

Getting assistance

If you are still experiencing problems after checking the list of solutions in the
Troubleshooting section then please refer to the customer support information
supplied on the front cover.

Safety information

• For use in dry, oil free indoor environments only.

• Do not use to link between buildings.

• Ensure that all twisted pair interconnect cables are installed in compliance
with all applicable wiring regulations.

• Do not connect CATx link interfaces (RJ45 style connectors) to any other
equipment, particularly network or telecommunications equipment.

• Warning – the power adapter contains live parts.

• No user serviceable parts are contained within the power adapter - do not
dismantle.

• Plug the power adapter into a socket outlet close to the module that it is
powering.

• Replace the power adapter with a manufacturer approved type only.

• Do not use the power adapter if the power adapter case becomes damaged,
cracked or broken or if you suspect that it is not operating properly.

• If you use a power extension cord with the module, make sure the total
ampere rating of the devices plugged into the extension cord do not exceed
the cord’s ampere rating. Also, make sure that the total ampere rating of all
the devices plugged into the wall outlet does not exceed the wall outlet’s
ampere rating.

• Do not attempt to service the modules yourself.

• The module and power supply can get warm in operation – do not situate
them in an enclosed space without any ventilation.

• The module does not provide ground isolation and should not be used for
any applications that require ground isolation or galvanic isolation.

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Radio Frequency Energy

A Category 5 (or better) twisted pair cable must be used to connect the Wizard
IP unit in order to maintain compliance with radio frequency energy emission
regulations and ensure a suitably high level of immunity to electromagnetic
disturbances.

All other interface cables used with this equipment must be shielded in order
to maintain compliance with radio frequency energy emission regulations and
ensure a suitably high level of immunity to electromagnetic disturbances.

European EMC directive 89/336/EEC

This equipment has been tested and found to comply with the limits for a class
A computing device in accordance with the specifications in the European
standard EN55022. These limits are designed to provide reasonable protection
against harmful interference. This equipment generates, uses and can radiate
radio frequency energy and if not installed and used in accordance with the
instructions may cause harmful interference to radio or television reception.
However, there is no guarantee that harmful interference will not occur in a
particular installation. If this equipment does cause interference to radio or
television reception, which can be determined by turning the equipment on
and off, the user is encouraged to correct the interference with one or more
of the following measures: (a) Reorient or relocate the receiving antenna. (b)
Increase the separation between the equipment and the receiver. (c) Connect
the equipment to an outlet on a circuit different from that to which the receiver
is connected. (d) Consult the supplier or an experienced radio/TV technician for
help.

FCC Compliance Statement (United States)

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 J 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 may 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 manufacturer could void the user’s authority to operate the equipment.

Canadian Department of Communications RFI statement

This equipment does not exceed the class A limits for radio noise emissions from
digital apparatus set out in the radio interference regulations 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 radioélectriques publié par le ministère des
Communications du Canada.

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Certification notice for equipment used in Canada

The Canadian Department of Communications label identifies certified equipment. This
certification means that the equipment meets certain telecommunications-network
protective, operation, and safety requirements.

The Department does not guarantee the equipment will operate to the user’s
satisfaction.

Before installing this equipment, users should ensure that it is permissible to be
connected to the facilities of the local telecommunications company.

The equipment must also be installed using an acceptable method of connection. In
some cases, the company’s inside wiring associated with a single-line individual service
may be extended by means of a certified connector assembly (extension cord). The
customer should be aware that compliance with the above conditions may not prevent
degradation of service in some situations.

Repairs to certified equipment should be made by an authorized Canadian maintenance
facility—in this case, your supplier. Any repairs or alterations made by the user to this
equipment, or equipment malfunctions, may give the telecommunications company
cause to request the user to disconnect the equipment.

Users should ensure for their own protection that the electrical ground connections of
the power utility, telephone lines, and internal metallic water pipe system, if present,
are connected together. This precaution may be particularly important in rural areas.

CAUTION:
Users should not attempt to make such connections themselves, but should contact the

appropriate electric inspection authority, or electrician, as appropriate.
The LOAD NUMBER (LN) assigned to each terminal device denotes the percentage of

the total load to be connected to a telephone loop which is used by the device, to
prevent overloading. The termination on a loop may consist of any combination of
devices, subject only to the requirement that the total of the load numbers of all the
devices does not exceed 100.

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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 pedestales

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.
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.

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© 2006 Black Box Corporation
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Black Box Corporation,
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PA 15055-1018,
United States of America
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