Black Box ServSwitch Duo KV6104SA User manual

KV6104SA
KV6108SA
KV6112FA
KV6116FA
For FREE Technical Support 24 hours a day, 7 days a week, call 724-746-5500.
Address: 1000 Park Dr., Lawrence, PA 15055-1018 • Phone: [phone] • Fax: [phone]
World-Wide Web: http://www.blackbox.com • E-mail: [email protected]
© Copyright 1998. Black Box Corporation. All rights reserved.
Customer Support Information:
JULY 1998

1
THE SERVSWITCH™ FAMILY
Welcome to the ServSwitchTM Family!
Thank you for purchasing a BLACK BOX®ServSwitch™Brand KVM switch! We
appreciate your business, and we think you’ll appreciate the many ways that your
new ServSwitch keyboard/video/mouse switch 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 Duo™unit, including
how to install, operate, and troubleshoot it. For an introduction to the ServSwitch
Duo, see Chapter 2. The ServSwitch Duo product codes covered in this manual
are:
KV6104SA
KV6108SA
KV6112FA
KV6116FA
This manual also includes information about the Remote-Control Module
accessory, whose product code is:
KV6REM

2
SERVSWITCH DUO™
TRADEMARKS USED IN THIS MANUAL
BLACK BOX and the logo are registered trademarks, ServSwitch
and ServSwitch Duo are trademarks of Black Box Corporation.
Apple and Macintosh are registered trademarks of Apple Computer, Inc.
Compaq is a registered trademark of Compaq Computer Corporation.
Gateway 2000 is a registered trademark of Gateway 2000 Corporation.
Hewlett-Packard is a registered trademark of Hewlett-Packard.
IBM, PC/AT, PS/2, RS/6000, and ThinkPad are registered trademarks, and
PC/XT is a trademark, of IBM Corporation.
Logitech, MouseMan+, and Pilot Mouse+ are trademarks of Logitech, Inc.
Microsoft and Windows are registered trademarks, and IntelliMouse is a
trademark, of Microsoft Corporation.
SGI is a registered trademark of Silicon Graphics, Inc.
Sun Microsystems is a registered trademark of Sun Microsystems, Inc.
Any other trademarks mentioned in this manual are acknowledged to be the property of the
trademark owners.

3
FCC/IC STATEMENTS
FEDERAL COMMUNICATIONS COMMISSION
AND
INDUSTRY CANADA
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 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 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 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 Industry Canada.
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 Industrie Canada.

4
SERVSWITCH DUO™
EUROPEAN UNION DECLARATION OF CONFORMITY
This equipment has been tested and found to comply with the limits for a class B
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.
Shielded 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.

5
NOM STATEMENT
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.

6
SERVSWITCH DUO™
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.

7
TABLE OF CONTENTS
Contents
Chapter Page
1. Specifications ............................................................................................... 9
2. Introduction ............................................................................................... 11
2.1 Features and Benefits of the ServSwitch Duo ................................... 11
2.2 The Complete ServSwitch Duo Package ............................................ 12
2.3 The ServSwitch Duo Illustrated ......................................................... 13
2.4 Safety Concerns ................................................................................... 15
3. Installation .................................................................................................. 16
3.1 What You Will Need ............................................................................ 16
3.2 Rackmounting the ServSwitch Duo (Optional) ................................ 17
3.3 Connecting Your Devices ................................................................... 17
3.4 Connecting Power ............................................................................... 19
4. Configuration ............................................................................................. 20
4.1 Configuring Your PCs ......................................................................... 20
4.2 Configuring the ServSwitch Duo ....................................................... 20
4.2.1 Entering Configuration Mode ............................................... 20
4.2.2 Setting the Screen-Saver Timeout ......................................... 21
4.2.3 Autoscanning: Setting the Scan Mode and Pause Time ....... 22
4.2.4 Setting the Switchover Timeout ............................................. 23
4.2.5 Setting Mouse-Mode Reporting and Mouse Switching ........ 23
4.2.6 Setting the Hotkey Sequence ................................................. 25
4.2.7 Viewing the Firmware Revision, Restoring Mouse
Function, or Resetting to Factory Defaults ......................... 26
4.2.8 Setting the Appearance of the On-Screen Display ............... 26
4.2.9 Setting the Password ............................................................... 27
4.2.10 Exiting Configuration Mode .................................................. 27

8
SERVSWITCH DUO™
Contents (continued)
Chapter Page
5. Operation ................................................................................................... 28
5.1 Power Status ...................................................................................... 28
5.2 The Status LEDs ............................................................................... 28
5.3 The Front-Panel Pushbuttons and the Remote-Control Module .. 28
5.4 The Status Display ............................................................................ 30
5.5 Using the Dual Control Ports (A and B) ........................................ 31
5.6 Things to Keep in Mind About the Keyboards and Mice .............. 31
5.7 Keyboard Control: Hotkey Commands ........................................... 32
5.8 On-Screen Menu Control ................................................................ 35
5.8.1 Adding a Computer to the Menu List ................................... 36
5.8.2 Deleting a Computer from the Menu List ............................ 36
5.8.3 Editing a Computer on the Menu List .................................. 36
5.8.4 Selecting a Computer on the Menu List ............................... 37
5.8.5 Exiting the Menu .................................................................... 37
5.8.6 Configuring the Menu ............................................................ 37
5.8.7 Summary of Keys Used by the Menu and Their Functions .. 37
5.9 Mouse Control .................................................................................. 38
5.10 Re-Enabling a Disconnected PS/2 Mouse ...................................... 38
5.11 Hot-Plugging Devices Into the ServSwitch Duo and
Re-Enabling Disconnected CPU PS/2 Mouse Ports .................... 38
5.12 RS-232 Control .................................................................................. 40
5.13 Cascading ServSwitch Duos ............................................................. 40
6. Troubleshooting ........................................................................................ 43
6.1 Things to Try ....................................................................................... 43
6.2 Calling Black Box ................................................................................ 46
6.3 Shipping and Packaging ..................................................................... 46
Appendix: Cable and Connector Guidelines .................................................. 47
A.1 Cabling: Keyboard, Monitor, and Mouse to ServSwitch Duo ........... 47
A.2 Cabling: ServSwitch Duo to PCs ......................................................... 47
A.3 The Expansion Port ............................................................................ 49

9
CHAPTER 1: Specifications
1. Specifications
Compliance — CE (EN55022 Class B); FCC Part 15 Subpart J Class A,
IC Class/ classe A
Standards — VGA, SVGA, XGA, or XGA-2 video
Interfaces — Video: VGA;
Keyboard and mouse: IBM PS/2 compatible;
Expansion port: Proprietary variant of TIA RS-232
Resolution — Up to 1600 x 1200 noninterlaced at up to 100 Hz
Protocol — RS-232: Asynchronous
Data Format — RS-232: 8 data bits, no parity, 1 stop bit
Data Rate — RS-232: 1200 bps
Flow Control — RS-232: None
Maximum
Distance — 10 m (32.8 ft.) to any attached keyboard, monitor, and
mouse;
30 m (98.4 ft.) to any attached CPU or cascaded
ServSwitch Duo unit;
40 m (131.2 ft.) to an attached ServSwitch Duo Extender
across Premium Extender Cable
User Controls — Keyboard commands;
Mouse-click functions;
(2) Front-mounted pushbuttons;
On-screen menu
Indicators — All front-mounted:
KV6104SA, KV6108SA: Single 7-segment status display
with activity LED;
KV6112FA, KV6116FA: Dual 7-segment status display
with activity LED;
KV6104SA: (4) Port LEDs;
KV6108SA: (8) Port LEDs;
KV6112FA: (12) Port LEDs;
KV6116FA: (16) Port LEDs

10
SERVSWITCH DUO™
Connectors — All rear-mounted:
(2) HD15 female for monitor attachment;
(4) 6-pin mini-DIN female for keyboard and mouse
attachment;
(1) DB15 female for RS-232;
(1) Barrel jack for power;
For each computer port, a set of (1) HD15 female (for
video attachment) and (2) 6-pin mini-DIN female
(for keyboard-port and mouse-port attachment):
KV6104SA: (4);
KV6108SA: (8);
KV6112FA: (12);
KV6116FA: (16)
Power — Input: 100 to 240 VAC at 50 to 60 Hz from utility-power
outlet, through detachable power cord and IEC 320
male inlet, to external transformer;
Output: 5 VDC at up to 1 A from transformer to Switch;
Consumption: 5 watts maximum
MTBF — 500,000 hours (based on the historical reliability of
similarly designed and manufactured products)
Maximum
Altitude — 10,000 ft. (3048 m)
Temperature
Tolerance — 32 to 104˚ F (0 to 40˚ C)
Humidity
Tolerance — 5 to 60% noncondensing
Enclosure — Steel and aluminum
Size — KV6104SA, KV6108SA:
1.8" (1U) H x 17.3"W x 8.7"D (4.4 x 43.9 x 22.1 cm);
KV6112FA, KV6116FA:
3.5" (2U) H x 17.3"W x 8.7"D (8.9 x 43.9 x 22.1 cm)
Weight — KV6104SA: 4.8 lb. (2.2 kg);
KV6108SA: 5.1 lb. (2.3 kg);
KV6112FA: 6.8 lb. (3.1 kg);
KV6116FA: 7 lb. (3.2 kg)

11
CHAPTER 2: Introductiom
2. Introduction
The ServSwitch Duo™is a high-performance keyboard-, monitor-, and mouse-
sharing device that supports a wide range of IBM®PC compatible hardware and
software platforms.
2.1 Features and Benefits of the ServSwitch Duo
Here are some of the useful features of the ServSwitch Duo and some of the ways
those features benefit you:
• Control multiple PCs from a local and remote keyboard, monitor, and mouse.
• Use the on-screen menu to assign names to computers and select channels on
that basis.
• Mixed PC/AT®and PS/2®keyboards and PS/2 and RS-232 mice supported
as standard.
• Can be cascaded to control hundreds of CPUs.
• High-resolution circuitry ensures the best possible video, even over extended
distances.
• Password security prevents unauthorised use.
• Optional Remote-Control Module for convenient operation.
• Channel switching through on-screen display, front-panel pushbutton,
keyboard hotkey sequence, or 3-button mouse.
• Automatically restores keyboard and mouse states when channel is changed.
• Can be switched remotely through its RS-232 serial port.
• Supports high-bandwidth monitors at resolutions up to 1600 x 1200 pixels.
• Supports keyboard modes 1, 2, and 3, as well as both “prompt” and “stream”
mouse modes, for maximum compatibility.
• Includes screen-blank, autoscan, and variable-hotkey options.
• Confirmation of selected ports on local and cascaded Switches.
• Support for Microsoft®IntelliMouse™.
• Mouse-restoration functions to enable hot-plugging of certain systems.

12
SERVSWITCH DUO™
2.2 The Complete ServSwitch Duo Package
You should have received these components with your ServSwitch Duo:
• The ServSwitch Duo itself.
• A power-supply transformer and output cord.
• A power-supply input cord suitable for your country or region.
• (1) PS/2 to serial mouse adapter and (1) PS/2 to AT keyboard adapter for
every (4) CPU ports on a given Switch; in other words, the 4-port Switch comes
with one mouse adapter and one keyboard adapter, the 8-port Switch comes
with two mouse adapters and two keyboard adapters, and so on.
• (6) Stick-on self-adhesive rubber feet (for desktop applications).
• (2) Mounting brackets and, depending on the Switch’s size, (4) or (6) screws
(for mounting the Switch in a 19" rack).
• This manual.
If you didn’t receive everything, or if anything arrived damaged, contact Black Box
right away.

13
CHAPTER 2: Introduction
2.3 The ServSwitch Duo Illustrated
Fig. 2-1. The front and side panels of the 4- and 8-port ServSwitch Duo
models (KV6104SA and KV6108SA).
Fig. 2-2. The rear panel of the 4- and 8-port ServSwitch Duo models.
Fig. 2-3. The Remote-Control Module (KV6REM), an optional accessory
for the 4- and 8-port Switch models.
1A
5V B A 8 7 6 5 4 3 2 1
AUTO SCAN SELECT
BLACK BOX
A B
1 2 3 4 5 6 7 8
ACTIVE USER
Key for
selecting
autoscan
Control-port monitor
connectors
CPU-port video connectors
Control ports
A and B
Power
connector
Control-port
mouse connectors
Control-port keyboard
connectors
Expansion port for Remote-Control Module and RS-232 control
Both keys together
used to lock the
Switch or reset
keyboards and mice
Display shows
status and
mouse/keyboard
data activity
Attachment
points for
rackmount
bracket
Red LEDs
show currently
active control
port (A or B)
Green LEDs show
the ON/OFF status
of connected CPUs
(LEDs 5 through 8
are present on
8-port model only)
Key for
changing
channels and
entering
configuration
mode
CPU ports 1 through 8 (ports 5 through 8
are present on 8-port model only)
CPU-port mouse
connectors
CPU-port keyboard
connectors

14
SERVSWITCH DUO™
Fig. 2-4. The front and side panels of the 12- and 16-port ServSwitch Duo
models (KV6112FA and KV6116FA).
Fig. 2-5. The rear panel of the 12- and 16-port ServSwitch Duo models.
1A
5V B A 8 7 6 5 4 3 2 1
16 15 14 13 12 11 10 9
A B
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
ACTIVE USER
PWR
AUTO SCAN SELECT
BLACK BOX
Key for
selecting
autoscan
Both keys together
used to lock the
Switch or reset
keyboards and mice
Display shows
status and
mouse/keyboard
data activity
Attachment
points for
rackmount
bracket
Red LEDs
show currently
active control
port (A or B)
Green LEDs show
the ON/OFF status
of connected CPUs
(LEDs 13 through 16
are present on
16-port model only)
Key for
changing
channels and
entering
configuration
mode
LED shows the
power status
of the Switch
Control-port monitor
connectors
CPU-port video connectors
Control ports
A and B
Power
connector
Control-port
mouse connectors
Control-port keyboard
connectors
Expansion port for Remote-Control Module and RS-232 control
CPU ports 1 through 16 (ports 13 through 16
are present on 16-port model only)
CPU-port mouse
connectors
CPU-port keyboard
connectors

15
CHAPTER 2: Introduction
2.4 Safety Concerns
As you prepare to install the ServSwitch Duo, please keep these things in mind:
• The Switch is for use in dry, oil-free indoor environments only.
• Warning: The Switch’s power adapter contains no user-serviceable parts, but it
does contain parts capable of delivering hazardous electric shocks—do not
attempt to dismantle it!
• Plug the power adapter into a socket outlet close to the Switch.
• Do not use the Switch’s power adapter if its case becomes damaged, cracked,
or broken, or if you suspect that it is not operating properly.
• If the Switch’s power adapter stops working, replace it with a manufacturer-
approved adapter of the same type only.

16
SERVSWITCH DUO™
3. Installation
3.1 What You Will Need
You’ll need these things to be in place before you can install your ServSwitch Duo:
• Cables to connect the ServSwitch Duo to the keyboard, video, and mouse ports
of each of your PCs. Cable specifications are given in Appendix A. (You do not
need to connect a mouse cable if you are not using the mouse).
• A monitor with a standard VGA/SVGA (HD15) connector that will work when
connected directly to each of your PCs. The ServSwitch Duo supports low- and
high-resolution monitors.
• A standard PC/AT or PS/2 style keyboard. If you are using an AT keyboard
with a 5-pin DIN connector, you may connect it to the ServSwitch Duo using
a standard AT to PS/2 keyboard adapter (one of these is included for every
fourCPU ports your Switch has).
• A PS/2 style two- or three-button Microsoft®or Logitech™compatible mouse or
a Microsoft IntelliMouse™compatible mouse. If you want to use the mouse to
switch channels on the ServSwitch Duo, you will need a three-button mouse or
an IntelliMouse. (The Switch supports other “Internet mice” compatible with
the IntelliMouse—fitted with a wheel or other scrolling control, and
sometimes additional buttons—including the Logitech Pilot Mouse+™,
Logitech MouseMan+™, Genius™NetMouse™and Genius NetMouse Pro™)
All of the mouse connections from ServSwitch Duo to the attached PCs
support either a PS/2 or an RS-232 mouse. The Switch automatically converts
PS/2 mouse commands to RS-232 serial-mouse commands. You can use a
serial mouse if you attach it to the Switch through an appropriate adapter,
as described in the Appendix (one of these adapters is included for every
fourCPU ports your Switch has). The Switch will operate without a mouse
connected if you do not wish to use one.
• A suitable mouse driver for your PCs. Supported types are:
- PS/2 or RS-232 two-button mouse driver by any manufacturer.
- Microsoft mouse drivers, including those for the IntelliMouse.
- Logitech mouse drivers, including those for two-button, three-button, and
wheel mice.

17
CHAPTER 3: Installation
3.2 Rackmounting the ServSwitch Duo (Optional)
The ServSwitch Duo has been designed to be used either on a desktop or mounted
in a 19" rack. If the ServSwitch Duo is to be used on a desktop, you will need to
stick the included self-adhesive rubber feet to the underside of the Switch. If the
ServSwitch Duo is to be mounted in a 19" rack, you will need to fit the included
rackmount brackets to the sides of the Switch using the included screws.
3.3 Connecting Your Devices
Make sure that your single or master ServSwitch Duo and (if possible) all the
devices you want to attach to it are turned off and unplugged. (If you have to “hot-
plug” any powered computers into the Switch, see Section 5.11.) Connect one or
two sets of shared user equipment (keyboard, PS/2 mouse, and monitor) to the
appropriate connectors on the Switch’s rear panel (either or both of control
ports A and B; see Figure 2-2 or 2-5 in Section 2.3). If you are connecting two sets
of keyboards, monitors, and mice, you don’t need to use the same brands or types
of devices on each control port: For example, you can use a two-button PS/2
mouse on one port and a Microsoft IntelliMouse on the other. If you have had to
place the Switch farther from the user equipment than the equipment’s native
cables will reach, you can plug the native cables into ServSwitch Duo User-
Extension Cable (our product code EHN409), which comes in 10-foot (3-m) and
30-foot (9.1-m) lengths. If you need to run even farther, you can use a ServSwitch
Duo Extender (our product code KV6EXT) with 130-ft. (39.6-m) Premium
Extender Cable (our product code KV6100) to connect the Switch to the
keyboard, mouse, and monitor. (For more information about the Extender,
see its manual.)
Both the User-Extension Cable and Premium Extender Cable, as well as the
CPU-Extension Cable discussed in the next paragraph, are built to the special
three-in-one design shown in Figure 3-1 on the next page. The central coaxial
video strand of each cable is molded to the keyboard and mouse strands on either
side, and the ends of its video strand are one inch (2.5 cm) longer than the ends of
the other strands, so that the weight of the composite cable can be borne by the
video connector’s screwlocks. To help you tell the otherwise identical keyboard
and mouse strands apart, the keyboard strand is labeled “K” and colored orange,
while the mouse strand is labeled “M” and colored green.

18
SERVSWITCH DUO™
Figure 3-1. The ServSwitch Duo cables.
Next, connect each computer or (in cascaded systems) subsidiary ServSwitch
Duo to your single/master Switch. One way to do this is to run separate male-to-
male keyboard-, mouse-, and video-extension cables from the appropriate CPU-
port connectors on the single/master Switch to (a) the keyboard, mouse, and
video ports respectively of the computer or (b) the keyboard, mouse, and monitor
connectors respectively of control port A or B of the subsidiary Switch. (Any
unused CPU-port or control-port connectors on the single/master Switch can be
left vacant.) Alternatively, instead of three separate cables, you can use our three-
in-one ServSwitch Duo CPU-Extension Cable (our product code EHN408), whose
design is shown in Figure 3-1 above. This cable is available in 5-foot (1.5-m),
10-foot (3-m), 30-foot (10-m), 50-ft. (15-m), and 100-ft. (30-m) lengths.
HD15
Central
video
strand
Keyboard and mouse
strands molded to sides
Cross-section:
9"
(22.9
cm)
10"
(25.4
cm)
6-Pin
mini-DIN
6-Pin
mini-DIN

19
CHAPTER 3: Installation
To connect computers with serial mouse ports and PC/AT style keyboard ports,
you’ll need adapters, as shown in Figure 3-2 below . Refer to the Appendix for
cable guidelines.
Figure 3-2. Using adapters to connect computers with serial mouse ports or
PC/AT keyboard ports.
3.4 Connecting Power
Once you’ve installed your ServSwitch Duo and attached your equipment to it, you
can plug its power supply into the jack on the back of the Switch, then attach the
input cord to the power-supply transformer’s IEC 320 inlet, then plug the input
cord into utility (mains) power. (Always apply power to the ServSwitch Duo first,
then power on the monitor and each of the computers; if you power up the
computers before the Switch, the computers might not recognize the presence
of the mouse or keyboard.) The Switch should start operating immediately; it has
no ON/OFF switch.
PS/2 style kbd/mouse cable
To Switch’s CPU-port
mouse connector
(6-pin mini-DIN)
To Switch’s CPU-port
keyboard connector
(6-pin mini-DIN)
PS/2 to Serial Mouse
Adapter; to computer’s
serial mouse port (DB9)
(one included for each
four CPU ports)
PS/2 to PC/AT Keyboard
Adapter; to computer’s
AT compatible keyboard
port (5-pin DIN)
(one included for each
four CPU ports)
PS/2 style kbd/mouse cable