Digitus DS-12851 User manual

KVM SWITCH,
2x1 DP, DP OUT, USB
User Manual
DS-12851

2
User consideration
The manufacturer has the right to modify and change the information, documents
and specifications contained in the manual without prior notice. The manufacturer
does not warrant, express, imply or statutorily declare its contents or specifically
disclaims its merchantability and fitness for a particular purpose. Any of the
manufacturer's software described in this manual that is sold and licensed. If the
software program is found to be defective after purchase, the purchaser (and non-
manufacturer, its distributor or its purchaser) will be responsible for all necessary
services, repairs and any accidental or consequential damages caused by the
software.
The manufacturer is not responsible for any unauthorized adjustments to the radio
and / or television interference caused by this equipment, and the user must correct
the interference.
If the operating voltage setting is not correctly selected before operation, the
manufacturer will not be liable for any damage caused.
Be sure to confirm that the voltage is set correctly before use. This product does
not have a power supply. If the power supply is required in a special environment,
the customer can configure it according to the product power interface (power
supply socket specification 5.5 mm x 2.1 mm) and the power socket printing
parameters.
Package Contents
The multi-computer KVM switch package includes the following:
•1 x Pc Host KVM switch,
•2 x sets of custom KVM connection cables
•1 x user manual
Check that all parts are in place and that they are not damaged in transit. If you
encounter problems, please contact your dealer.
To prevent damage to the machine or equipment connected to the machine, please
read this manual carefully and follow the instructions for installation and operation.
∗Since the publication of this manual, there may be new product features. Please
visit our website to download the latest version of the user manual.

3
Contents
About manual........................................................................................................4
Product information ..............................................................................................4
CHAPTER 1................................................................................................................5
INTRODUCTION ..............................................................................................................5
Product description ...............................................................................................5
Product features....................................................................................................5
Operating system ..................................................................................................6
CHAPTER 2................................................................................................................8
HARDWARE INSTALLATION................................................................................................8
Cable connection and installation .........................................................................8
CHAPTER 3................................................................................................................9
BASIC OPERATION...........................................................................................................9
Overview ...............................................................................................................9
Manual switching method ....................................................................................9
Hotkey switching method......................................................................................9
Power off and restart ............................................................................................9
CHAPTER 4..............................................................................................................10
KEYBOARD OPERATION ..................................................................................................10
Overview .............................................................................................................10
Hotkey setting: ....................................................................................................10
APPENDIX...............................................................................................................13
SAFETY INSTRUCTIONS...................................................................................................13
General................................................................................................................13
PRODUCT SPECIFICATION................................................................................................15

4
About manual
This User Manual will assist you in the effective use of product features, including the
installation, setup, and operation of your equipment. You can find out what is
included in this manual from the following:
Chapter 1 Introduction - This chapter describes the rack-mounted KVM device
system, including its functions, features, and benefits, and describes and describes its
front and rear panel components.
Chapter 2 Hardware installation - This section explains how to install this product.
Chapter 3 Basic operation - Explain the basic operational concept of the KVM switch.
Chapter 4 Keyboard Port Operation - Describes the keyboard's hotkey combination
operations and settings.
Appendix - Mainly provide specifications and other technical information about
the relevant KVM switch.
Common terms:
The symbol Indicates the text information that should be entered.
[ ] The keys that need to be entered are indicated in parentheses.
For example , [ Enter ] Indicates that the Enter key is pressed. For keys that need to
be entered at the same time, they are placed in the same parenthesis, and the keys
are connected by a plus sign. For example: [ Ctrl ]
1. The number indicates the actual sequence number of the operation steps.
A diamond symbol indicates that information is provided for reference, but is
not related to the operational steps.
The origin symbol indicates the classification sub-item information, regardless
of the operation steps.
Product information
To find out more about our KVM product information and how to use it more
efficiently, you can go to our website or contact an authorized reseller for more
contact information.

5
Chapter 1
Introduction
Product description
As a KVM switch, 2 port desktop KVM Series Switcher allows users to access from a
single USB keyboard, mouse and DisplayPort® display console
accesses 2 computers. As per built in USB hub, it allows each
computer (one computer at a time) to access the connected peripherals.
Switcher installation is quick and easy, just plug the cable into the correct port. No
software settings are required, no installation procedures and no compatibility
issues. Desktop compact design, metal casing, easy to install and place to provide a
variety of video interface options, to provide users with a variety of fast switching
options for audio, video, USB devices, saving desktop space, is a multimedia
application such as SOHO office Ideal.
Product features
2 port USB multiple video series KVM switch
Single USB controls 2 of computers and peripherals USB (low speed)
Built-in USB2.0 hub, compatible with USB2.0 protocol specification
DisplayPort® video maximum support resolution is 4K@60fp
Provide keyboard hotkey switching shortcut function and device panel button
two switching function selection
Support multiple platforms for various operating systems
BIOS level hardware connection, no need to install drivers and control software
The front panel of the device is extended with a USB interface, which is
convenient for users to connect peripheral devices such as a USB keyboard, a
mouse, or a USB flash drive or a USB printer.
Provide a variety of hotkey selection and setting functions, so that users can set
their own hotkeys according to the situation.
Automatically scans the connected computer.

6
Operating system
Operating systems supported by remote users' computers include: Windows
XP and above
The operating systems supported by the server connected to the switch are
shown in the following table:
Operating system
Version
Windows
Windows XP/ 7/ 9/ 10 /11 or higher
Linux
RedHat
9.0 or higher
SuSE
10/11.1 or higher
Debian
3.1/4.0
Ubuntu
7.04/7.10
UNIX
AIX
4.3 or higher
FreeBSD
5.5 or higher
Sun Solaris
8 or higher
Mac
OS 9.0 to 10.6 (Snow Leopard)
Novell
Netware
6.0 or higher

7
Components
Front view Rear view
①.
Power Indicator
②. Power Button
③. Front USB interface, you can
connect mouse and keyboard,
U disk storage device and
printer.
④.
Power 9V DC=, optional
⑤. Local USB keyboard and
mouse input interface
⑥. For DisplayPort® video interface
(Output)
⑦. For DisplayPort® video interface
(Input)
⑧. Local audio output interface
⑨. Output interface for local MIC
⑩. For the computerside B type
USB connection interface
⑪. For the integrated audio and MIC
interface connect to KVM cable

8
Chapter 2
Hardware installation
Cable connection and installation
KVM switches can be placed on any suitable surface, and is sufficient to safely
support the weight of the device plus the additional cable; clean and make sure that
no other plane debris would affect the switch ventilation and normal operation.
To install For a 2 port desktop KVM device, follow these steps:
1. Plug the USB keyboard and USB mouse into the USB console port on the rear
panel of the device.
2. Plug DISPLAYPORT display into the console video port on the rear panel of the
device.
3. If you use a separate speaker and microphone, plug it into the console analog
audio port on the rear panel of the device.
4. With a custom KVM cable set, The KVM cable connector and the
included USB connector are plugged into the corresponding jacks on the rear
panel of the switch.
5. Put the other end of the cable, video and plug the USB cable into the
corresponding USB and graphics video interface on your computer.
6. Insert the USB peripheral into the Type A jack (one on the front panel;
the other two on the rear panel)
7. Turn on the monitor.
8. KVM is powered by computer USB port. To turn on computer to activate
KVM switch. (For external power supply, which is optional.
Please use DC 9V power supply)
9. Turn on your computer

9
Chapter 3
Basic operation
Overview
There are two ways for the KVM switch to access the connected computer: the
combination hotkey on the USB keyboard to switch operations or the manual switch
operation on the front of the KVM device.
Manual switching method
The user only needs to press the corresponding touch button on the front panel
of the KVM , and the buzzer will sound a tone indicating that the switch port is
successful, and the USB , audio and video signals of the corresponding port will be
switched to the corresponding port on the local port.
Hotkey switching method
Users can use the keyboard connected to the USB interface on the KVM device
to perform hotkey operation. For details, please refer to the detailed description in
the following sections.
Power off and restart
If it is necessary to turn off the power to the device, before turning the device back
on, you must do the following:
1. Unplug the data cable from all the computers connected to the switch.
2. Unplug the power adapter cable from the switch if there is.
3. Wait 10 seconds, if there is power, plug the power adapter cable back into
the switch.
4. Then connect the computer data cable and turn on the computer.

10
Chapter 4
Keyboard operation
Overview
The KVM product in this desktop series offers a large number of easy hotkey
operations, making it easy to set up KVM via the keyboard or to complete port
switching.
Hotkey setting:
This series of products provides 4 combinations of hotkeys for user selection and
setting. The default hotkey is “LEFT” [ CTL ] [ CTL ] to switch to the next online port,
[ CTL ] + [ SHIFT ] [ 1 ] or [ 2 ] Switch to the specified port. The following table is a
description of the four hotkey combinations, please check the settings when using
the user:
1. [ CTRL ] + [ SHIFT ] mode
Hotkey combination
Description
[
CTRL] [CTRL]
Press twice to switch to the next device
online port
[
CTRL] + [ SHIFT ] [ 1 ] or [ 2 ]
Switch to the computer corresponding
to the port of [ 1 ] [ 2 ]
[CTRL] + [ SHIFT ] [ →] or [ ↓ ]
Switch to the next computer
[CTRL] + [ SHIFT ] [ ←] or [ ↑ ]
Switch to the previous computer
[CTRL] + [ SHIFT ] [ B ]
Buzzer on or off
[
CTRL] + [ SHIFT ] [ S ]
Automatic switching mode, the default
is 5seconds, press [ ESC ] to exit
[
CTRL] + [ SHIFT ] [ S ] [ N ]
Set the automatic switching mode
interval, press [ ESC ] to exit
[
CTRL] + [ SHIFT ] [ SCROLL ]
Switch to [ SCROLL ] + [ SCROLL ]
hotkey combination mode
[
CTRL] + [ SHIFT ] [NUM ]
Switch to [ NUM ] + [ NUM ] hotkey
combination mode
[
CTRL] + [ SHIFT ] [ CAPS ]
Switch to [ CAPS ] + [ CAPS ] hotkey
combination mode

11
2. [SCROLL ]+[SCROLL ] mode
Hotkey combination
Description
[
SCROLL ] [ SCROLL ] [ 1 ] or [ 2 ]
Switch to the computer corresponding
to the port of [ 1 ] [ 2 ]
[ SCROLL ] [ SCROLL ] [ →] or [ ↓ ]
Switch to the next computer
[ SCROLL ] [ SCROLL ] [ ←] or [ ↑]
Switch to the previous computer
[ SCROLL ] [ SCROLL ] [ B ]
Buzzer on or off
[
SCROLL ] [ SCROLL ] [ S ]
Automatic switching mode, the default
is 5seconds, press [ ESC ] to exit
[
SCROLL ] [ SCROLL ] [ S ] [ N ]
Set the automatic switching mode
interval, press [ ESC ] to exit
[
SCROLL ] [ SCROLL ] [ CTL ]
Switch to [ CTL ] + [ CTL ] hotkey
combination mode
[
SCROLL ] [ SCROLL ] [ NUM ]
Switch to [ NUM ] + [ NUM ] hotkey
combination mode
[
SCROLL ] [ SCROLL ] [ CAPS ]
Switch to [ CAPS ] + [ CAPS ] hotkey
combination mode
3. [ NUM ] + [ NUM ] mode
Hotkey combination
Description
[
NUM ] [ NUM ] [ 1 ] or [ 2 ]
Switch to the computer corresponding
to the port of [ 1 ] [ 2 ]
[ NUM ] [ NUM ] [ →] or [ ↓]
Switch to the next computer
[ NUM ] [ NUM ] [ ←] or [ ↑]
Switch to the previous computer
[ NUM ] [ NUM ] [ B ]
Buzzer on or off
[
NUM ] [ NUM ] [ S ]
Automatic switching mode, the default
is 5seconds, press [ ESC ] to exit
[
NUM ] [ NUM ] [ S ] [ N ]
Set the automatic switching mode
interval, press [ ESC ] to exit
[
NUM ] [ NUM ] [ SCROLL ]
Switch to [ SCROLL ] [ SCROLL ] hotkey
combination mode
[
NUM ] [ NUM ] [ CTL ]
Switch to [ CTL ] [ CTL ] hotkey
combination mode

12
4. [ CAPS ] + [ CAPS ] mode
Hotkey combination
Description
[
CAPS ] [ CAPS ] [ 1 ] or [ 2 ]
Switch to the computer corresponding
to
the port of [ 1 ] [ 2 ]
[ CAPS ] [ CAPS ] [ →] or [ ↓ ]
Switch to the next computer
[ CAPS ] [ CAPS ] [ ←] or [ ↑]
Switch to the previous computer
[ CAPS ] [ CAPS ] [ B ]
Buzzer on or off
[
CAPS ] [ CAPS ] [ S ]
Automatic switching mode, the default
is
5seconds, press [ ESC ] to exit
[ CAPS ] [ CAPS ] [ S ] [ N ]
Set the automatic switching mode
interval, press [
ESC ] to exit
[
CAPS ] [ CAPS ] [ SCROLL ]
Switch to [ SCROLL ] [ SCROLL ] hotkey
combination mode
[
CAPS ] [ CAPS ] [ NUM ]
Switch to [ NUM ] [ NUM ] hotkey
combination mode
[
CAPS ] [ CAPS ] [ CTL ]
Switch to [ CTL ] [ CTL ] hotkey
combination mode
Note:
1. The detection time of each hotkey is 5 seconds. If you press [ CTL ]
after 5 seconds after pressing [ CTL ] for the first time , this key combination will
be invalid input.
2. In the combination key, [ N ] represents the number key [ 1 ] ---- [ 9 ], the number
of seconds in the time interval can be set, as shown in the following table:
Automatic switching interval
N
second
1
5
2
10
3
15
4
20
5
25
6
30
7
35
8
40
9
60

13
Appendix
Safety Instructions
General
This product is for indoor use only.
Please read all instructions and use them for future reference.
Please follow all warnings and instructions on the device.
Do not place the device on any uneven surface (such as a cart, shelf, table, etc.).
If the device is dropped, it will be made.
Serious damage.
Do not use the device near water.
Do not place this unit near or above the radiator or heating unit.
The device housing is equipped with slots for heat dissipation and ventilation.
To prevent overheating during operation, do not block or cover the openings.
This device should not be placed on a soft surface (such as a bed, sofa, blanket,
etc.), which would block the fan opening and should not be placed in a sealed
environment unless proper ventilation has been provided.
Do not spill any liquid on the device.
The power of this unit must be removed from the wall outlet before cleaning.
Do not use any liquid or foamy cleaning agent. Please use a damp cloth to clean it.
Please use the device according to the type of power supply on the label. If you
are not sure if the power type is available, please contact your dealer or local
power company.
This equipment is designed for IT power distribution systems with phase-to-phase
voltages from 100V to 230V .
To prevent damage to your device, it is important that all equipment is properly
grounded.
Do not place anything on the power cord or cable, and arrange the power cord
and cable routing to avoid tripping over it.
If the device uses an extension cord, make sure that the total charge of all
products using the cord does not exceed the current carrying capacity of the
cord. Ensure that the total of all products plugged into the wall outlet is not more
than 15 A.

14
Use a surge suppressor, regulator, or uninterruptible power system ( UPS ) to help
protect your system from sudden, transient increases and decreases in power.
Please properly fix the system cable and power cord to ensure that nothing is
pressed against the cable.
Do not insert any objects into the machine through the slots in the casing. There
is a risk of contact with dangerous voltage points or short-circuiting parts that
could result in fire or electric shock.
Do not attempt to repair this equipment yourself. Please find a qualified service
person to obtain support services.
If the following conditions occur, unplug the unit from the wall outlet and have it
handed over to a qualified service person for repair.
Damaged or worn power cord or plug
Liquid is spilled into the device
The device is drenched by rain and water.
The device has been dropped or the casing has been damaged.
Significant changes in the functionality of this device
The device does not operate normally after following the operating
instructions.
Adjustments are only made to the control functions covered in the operating
instructions, and other improper operations may cause damage, so that a larger
work of qualified personnel is required to repair.

15
Product specification
Features
DS-12851
Computer connections
2
Port selection
Front panel buttons/Hotkey
Connector
Control
port
monitor
1 x DisplayPort® Type A female
keyboard
1 x USB Type A female
mouse
1 x USB Type A female
speaker
1 x Mini stereo jack
female(green)
microphone
1 x Mini stereo
jack female(pink)
Computer
port
monitor
2 x DisplayPort® Type A female
(black)
keyboard
and mouse
2 x USB Type B female (black)
speaker &
microphone
2 x Mini stereo jack female
(black)
power
1 x DC socket ( Optional Power)
Toggle switch
KVM switch button
2 x button
LED’s
online
2 x red
Selected
2 x green
Analog mode
Keyboard and mouse
USB
Maximum resolution video
4K @ 60 HZ
(3840 x 2160 @ 60 HZ)
Default Hotkey
[CTL] [CTL]
Operating
environment
Operating temperature
0-50 °C
Storage temperature
-20-60 °C
Humidity
0-80% RH , no condensation
Housing
House
Metal, Black
Size
132 x 92 x 44 mm
Weight
465g

16
Hereby Assmann Electronic GmbH, declares that the Declaration of
Conformity is part of the shipping content. If the Declaration of Conformity is
missing, you can request it by post under the below mentioned manufacturer
address.
www.assmann.com
Assmann Electronic GmbH
Auf dem Schüffel 3
58513 Lüdenscheid
Germany