Gefen Switch EXT DPKVM 441 User Manual

®
4x1 DPKVM  
Switcher  
EXT-DPKVM-441  
User Manual  
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CONTENTS  
1
2
3
4
5
6
7
8
8
9
10  
Introduction  
Operation Notes  
Features  
Front Panel Layout  
Front Panel Descriptions  
Back Panel Layout  
Back Panel Descriptions  
IR Remote Control Unit  
Layout and Description  
Installing the Battery  
Setting the IR Channel  
11 Connecting the 4x1 DPKVM Switcher  
11 Wiring Diagram  
12 Operating the 4x1 DPKVM Switcher  
12  
12  
12  
13  
13  
Front Panel Buttons and LED Indicators  
Switching sources using the front panel buttons  
Switching sources using the IR Remote Control Unit  
Switching sources using RS-232  
Switching sources using Telnet  
14 RS-232 Control  
15 RS-232 Commands  
15  
20  
23  
IP Conguration  
General Commands  
Routing Commands  
24 Telnet Control  
26 Firmware Update  
27 Rack Ear Installation  
28 Specications  
29 Warranty  
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INTRODUCTION  
Congratulations on your purchase of the 4x1 DPKVM Switcher. Your complete  
satisfaction is very important to us.  
Gefen  
Gefen delivers innovative, progressive computer and electronics add-on solutions  
that harness integration, extension, distribution and conversion technologies.  
Gefen’s reliable, plug-and-play products supplement cross-platform computer  
systems, professional audio/video environments and HDTV systems of all sizes  
with hard-working solutions that are easy to implement and simple to operate.  
The Gefen 4x1 DPKVM Switcher  
Easily switch between four computers using DisplayPort with the Gefen 4x1  
DPKVM Switcher.  
The rack-mountable Gefen 4x1 DPKVM Switcher offers an economical solution  
for switching between four different computers to one display location. In addi-  
tion, USB peripherals and audio are carried at the same time from each source  
making this a very versatile solution.  
Eliminating the need to purchase many displays, keyboards and other acces-  
sories for each computer in a studio or professional environment, this versatile  
solution saves money, supports both Mac and PC-type computers, and offers  
uncluttered and increased desktop space.  
The 4x1 DPKVM Switcher outputs are: One DisplayPort, two USB 2.0 ports  
(used for keyboard, mouse and other USB 2.0 peripherals) and an analog L/R  
audio. This Switcher can be controlled using front panel discrete switching, the  
included IR Remote control, or the RS-232 port for switching automation.  
The 4x1 DPKVM Switcher is compatible with all operating systems using Display-  
Port and USB.  
How It Works  
Connect the four included 6-foot DisplayPort cables between the computers  
and the Switcher inputs. Connect the four included USB cables between the  
computers and the USB inputs. Connect the four included audio cables between  
the computers and the audio inputs. Connect the Switcher output to the monitor  
using a DisplayPort cable. Connect the Switcher USB outputs to the USB pe-  
ripherals. Connect the Switcher audio cables to the audio devices. Connect the  
included 5V DC locking power supply to the 4x1 Switcher and connect the AC  
power cord to an available electrical outlet. The currently selected source will be  
displayed.  
1
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OPERATION NOTES  
READ THESE NOTES BEFORE INSTALLING OR  
OPERATING THE 4X1 DPKVM SWITCHER  
The 4x1 DPKVM Switcher supports Pass-through EDID. The Switcher will  
use the EDID from the monitor connected to the output.  
Dual Link resolutions up to 2560 x 1600 are supported.  
HDCP content is not supported.  
This Switcher does not support DHCP.  
The default IR channel for both the Switcher and the IR Remote Control Unit  
is channel 0. See page 10 for more information.  
2
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FEATURES  
Features  
Front panel switching using discrete select buttons  
Supports resolutions up to 2560 x 1600  
Supports RGB and YCbCr color spaces  
RS-232 control  
IP control  
IR remote control  
Supports USB 2.0 with backward-compatibility for USB 1.1  
Jack for external IR Receiver (EXT-RMT-EXTIR)  
Save space on your desktop  
Rack-mountable  
Package Includes  
(1) 4x1 DPKVM Switcher  
(4) 6 ft. DisplayPort cables  
(4) 6 ft. USB 2.0 cables (A - B)  
(4) 6 ft. 3.5 mm mini-stereo audio cables  
(1) IR Remote Control Unit (EXT-RMT-4IR)  
(1) 5V / 4A DC Locking Power Supply (EXT-PS54AULP)  
(1) Set Rack ears  
(1) User Manual  
3
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FRONT PANEL LAYOUT  
4
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FRONT PANEL DESCRIPTIONS  
1
Input Indicators (1 - 4)  
Each of these LED indicators glows bright blue according to the input selection  
(see Input Buttons, below)  
2
3
IR  
Receives IR signals from the included IR Remote Control Unit.  
Input Buttons (1 - 4)  
Pressing each of these buttons selects the desired input source (1-4).  
4
Power  
This LED indicator will glow bright red when the unit is powered.  
5
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BACK PANEL LAYOUT  
6
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BACK PANEL DESCRIPTIONS  
1
2
3
4
5
5V DC  
Connect the included 5V DC locking power supply to this receptacle.  
DP In 1 - In 4  
Each of these ports will accept a standard DisplayPort source device.  
Ext IR  
Connect an IR extender cable to this port.  
USB Out (1 - 2)  
Connect USB devices (e.g. mouse devices, keyboards, etc.) to these ports.  
Ethernet  
Use an Ethernet cable to connect the Switcher to a network in order to  
communicate via Telnet.  
6
RS-232 Serial Port  
This port is used for serial communication using an RS-232 control device. For  
details, refer to page 14.  
7
8
USB In (1 - 4)  
Connect USB source devices to these ports.  
DP Out  
This port will accept a single standard DisplayPort output device. The currently  
selected DisplayPort input source will be output via this port.  
9
Audio Out  
Connect an audio output device to this connector using a 3.5 mm mini-stereo  
cable. The audio output will be for the currently selected input source.  
10 Audio IN  
Connect audio source device to this port using the 3.5 mm mini-stereo cable.  
7
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IR REMOTE CONTROL UNIT  
Layout and Description  
1
2
1
2
Activity Indicator  
This LED will be activated momentarily each time a button is pressed.  
Source Selection Buttons (1 - 4)  
These buttons are used to select which source is routed to a monitor.  
NOTE: An Activity Indictor that ashes quickly while holding down any one  
of the four buttons indicates a low battery. Replace the  
IR Remote Control battery as soon as possible.  
8
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IR REMOTE CONTROL UNIT  
Installing the Battery  
1. Remove the battery cover on the back of the IR Remote Control Unit.  
2. Insert the included battery into the open battery slot. The positive (+) side of  
the battery should be facing up.  
3. Replace the battery cover.  
The Remote Control unit ships with two batteries. One battery is required for  
operation and the other battery is a spare.  
Battery Slot  
WARNING: Risk of explosion if battery is replaced by an incorrect type.  
Dispose of used batteries according to the instructions.  
9
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IR REMOTE CONTROL UNIT  
Setting the IR Channel  
In the event that IR commands from other remote controls interfere with the  
supplied IR Remote Control unit, changing the IR Remote Control’s IR channel  
will x the problem. The IR Remote Control unit has a bank of DIP switches used  
for setting the IR channel. The DIP switch bank is located underneath the battery  
cover.  
Left: Picture of the  
opened rear battery  
compartment of the IR  
remote showing the  
exposed DIP Switch  
bank between the  
battery chambers.  
Corresponding DIP Switch Settings for each IR Channel  
IR Channel 0  
(default)  
IR Channel 1  
IR Channel 2  
IR Channel 3  
ON  
ON  
ON  
ON  
1
2
1
2
1
2
1
2
It is important that the IR channel on the Remote Control unit, matches the IR  
channel set on the 4x1 DPKVM Switcher. For example, if both DIP switches on  
the IR Remote Control unit are set to IR channel 0 (both DIP switches down),  
then the 4x1 DPKVM Switcher must also be set to IR channel 0. See page 21 on  
how to change the IR channel on the 4x1 DPKVM Switcher.  
10  
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CONNECTING THE 4X1 DPKVM SWITCHER  
How to Connect the 4x1 DPKVM Switcher  
1
2
Connect up to four (4) DisplayPort source devices to the DisplayPort inputs  
on the back panel of the Switcher using DisplayPort cables.  
Connect a DisplayPort-supported display to the DisplayPort output on the  
back panel of the Switcher.  
a
OPTIONAL: To use the RS-232 communication feature, connect an  
RS-232 cable between the Switcher and RS-232 host controller.  
b
OPTIONAL: To communicate with the Switcher using Telnet, connect  
an Ethernet cable from the Ethernet jack on the back of the Switcher  
to the network. See page 24 for more information on using the Telnet  
feature.  
c
OPTIONAL: To extend the range of the IR control, connect an IR  
Extender (Gefen part no. EXT-RMT-EXTIR) to the back of the Switcher.  
3
4
Connect the included 5V locking power supply to the power receptacle on  
the 4x1 DPKVM Switcher  
Connect the opposite end of the power supply to an open wall socket power  
source.  
Wiring Diagram for the 4x1 DPKVM Switcher  
MINI STEREO AUDIO CABLE  
DISPLAYPORT CABLE  
RS-232 CABLE  
Computer  
USB CABLE  
Computer  
ETHERNET  
Computer  
IR  
IR Extender  
Computer  
Router  
DisplayPort Display  
DisplayPort KVM Switcher  
USB Mouse  
RS-232 Controller  
USB Keyboard  
Powered Speakers  
EXT-DPKVM-441  
ATTENTION: This product should always be connected to a grounded  
electrical socket.  
11  
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OPERATING THE 4X1 DPKVM SWITCHER  
Front Panel Buttons and LED Indicators  
The front panel of the 4x1 DPKVM Switcher has a set of four (4) LED  
indicators, displaying which input (source) is being displayed. Each of these LED  
indicators corresponds to one of the push-buttons on the front panel.  
Switching sources using the front panel buttons  
Example: Switch to input 3 using the front panel buttons:  
1
2
Press button 3 on the front panel of the 4x1 DPKVM Switcher.  
The LED indicator for input 3 will glow bright blue on the front panel.  
2
1
Switching sources using the IR Remote Control  
Example: Switch to Input 1 using the IR Remote Control:  
1
Press button 1 on the IR Remote Control Unit. The Activity Indicator on  
the IR Remote Control Unit will glow yellow, indicating that a button was  
pressed.  
2
The LED indicator for input 1 will glow bright blue.  
2
1
12  
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OPERATING THE 4X1 DPKVM SWITCHER  
Switching sources using RS-232  
Congure the Switch for use with RS-232 (see page 14 for details).  
Example: Switch to input 4 using RS-232  
1
Use the command r 4to route the Switcher to Input 4. See page 15 for  
important information on RS-232 commands. RS-232 commands are  
case-sensitive.  
2
The LED indicator for Input 4 will glow bright blue on the front panel.  
1
2
r 4  
Route to Input 4  
Switching sources using Telnet  
Congure the Switch for use with Telnet. See page 24 for details.  
Example: Switch to Input 2 using the Telnet protocol  
1
2
Use the command r 2to route the Switcher to Input 2.  
The LED indicator for Input 2 will glow bright blue.  
1
2
Type Cmd: r 2  
Route to Input 2  
13  
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RS-232 CONTROL  
Only pins 2 (Receive), 3 (Transmit), and 5 (Ground) are used for communication.  
A null-modem adapter should not be used with this product.  
5 4 3 2 1  
1 2 3 4 5  
9 8 7 6  
6 7 8 9  
Only Pins 2 (RX), 3 (TX), and 5 (Ground) are used on the RS-232 serial interface  
Serial Port Settings  
Bits per second ............................................................................................ 19200  
Data bits ............................................................................................................... 8  
Parity ............................................................................................................. None  
Stop bits ................................................................................................................1  
Flow Control .................................................................................................. None  
IMPORTANT: When sending RS-232 commands, a carriage return and  
a line feed character must be included at the end of each line.  
NOTE: Only pins 2 (Receive), 3 (Transmit), and 5 (Ground) are used  
for communication. A null-modem adapter should not be used with this  
product.  
14  
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RS-232 COMMANDS  
Command Syntax  
All RS-232 commands are case-sensitive and must be entered in lowercase.  
Each command must be preceded by the ‘#’ character. A carriage return must  
also be appended to every command.  
Example:  
#set_http_port 80[CR]  
IP Conguration  
Command  
Description  
#get_pass  
Prompts for the Telnet password  
Prompts for the Telnet username  
Displays all TCP/IP settings  
Sets IP conguration to default settings  
Sets the Web server listening port  
Sets the Telnet password  
#get_user_name  
#ipcong  
#rstip  
#set_http_port  
#set_pass  
#set_telnet_port  
#set_user_name  
#sgateway  
Sets the Telnet listening port  
Sets the Telnet user name  
Species the new gateway  
Species a new IP address  
Species a new net mask  
#sipadd  
#snetmask  
#use_telnet_pass  
Toggles Telnet password prompt  
#GET_PASS Command  
The #GET_PASS command prompts for the Telnet password.  
Syntax:  
#get_pass  
Parameters:  
None  
15  
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RS-232 COMMANDS  
#GET_USER_NAME Command  
The #GET_USER_NAME command prompts for the Telnet username.  
Syntax:  
#get_user_name  
Parameters:  
None  
#IPCONFIG Command  
The #IPCONFIG command displays all TCP/IP settings.  
Syntax:  
#ipcong  
Parameters:  
None  
#RSTIP Command  
The #RSTIP command resets the IP conguration to the default settings.  
Syntax:  
#rstip  
Parameters:  
None  
16  
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RS-232 COMMANDS  
#SET_HTTP_PORT Command  
The #SET_HTTP_PORT command sets the Web server listening port.  
Syntax:  
#set_http_port param1  
Parameters:  
param1  
Port  
[0 - 255]  
#SET_PASS Command  
The #SET_PASS command sets Telnet password.  
Syntax:  
#set_pass param1  
Parameters:  
param1  
String  
Notes:  
The maximum length of the password string is 20 characters.  
#SET_TELNET_PORT Command  
The #SET_TELNET_PORT command sets the Telnet server listening port.  
Syntax:  
#set_telnet_port param1  
Parameters:  
param1  
Port  
[0 - 255]  
17  
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RS-232 COMMANDS  
#SET_USER_NAME Command  
The #SET_USER_NAME command sets the Telnet user name.  
Syntax:  
#set_user_name param1  
Parameters:  
param1  
String  
Notes:  
The maximum length of the username string is 20 characters.  
#SGATEWAY Command  
Species the new IP gateway. Dot-decimal notation must be used when specify-  
ing the IP address. A reboot is required after the new IP gateway address has  
been assigned.  
Syntax:  
#sgateway param1.param2.param3.param4  
Parameters:  
param1  
param2  
param3  
param4  
Gateway address  
Gateway address  
Gateway address  
Gateway address  
[0 - 255]  
[0 - 255]  
[0 - 255]  
[0 - 255]  
Example:  
#sgateway 192.168.1.1  
18  
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RS-232 COMMANDS  
#SIPADD Command  
The #SIPADD command species a new IP address. Dot-decimal notation must  
be used when specifying the IP address. A reboot is required after the new IP  
address is set.  
Syntax:  
#sipadd param1.param2.param3.param4  
Parameters:  
param1  
param2  
param3  
param4  
IP address  
IP address  
IP address  
IP address  
[0 - 255]  
[0 - 255]  
[0 - 255]  
[0 - 255]  
Example:  
#sipadd 192.168.2.240  
#SNETMASK Command  
The #SNETMASK command species a new net mask. Dot-decimal notation  
must be used when specifying the IP address. A reboot is required after the new  
IP address is set.  
Syntax:  
#snetmask param1.param2.param3.param4  
Parameters:  
param1  
param2  
param3  
param4  
IP address  
IP address  
IP address  
IP address  
[0 - 255]  
[0 - 255]  
[0 - 255]  
[0 - 255]  
Example:  
#snetmask 255.255.255.0  
19  
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RS-232 COMMANDS  
#USE_TELNET_PASS Command  
The #USE_TELNET_PASS command enables / disabled the use of a Telnet  
password during the login process.  
Syntax:  
#use_telnet_pass param1  
Parameters:  
param1  
State  
[0 - 1]  
Meaning  
Value  
0
1
Disable password  
Enable password  
General Commands  
Command  
#activebolo  
#fadefault  
#irrmtadd  
Description  
Activates the bootloader  
Resets the Switcher to the default routing state  
Sets the IR address for the Switcher  
Toggles the lock power state  
#lockpower  
#stbymode  
Toggles Standby (power OFF) Mode  
#ACTIVEBOLO Command  
The #ACTIVEBOLO function activates the bootloader. This command is required  
in order to begin the rmware update procedure. See page 26 for details.  
Syntax:  
#activebolo  
Parameters:  
None  
Notes:  
This command must be executed twice, in order to active the bootloader.  
20  
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RS-232 COMMANDS  
#FADEFAULT Function  
The #FADEFAULT function will reset the Switcher to the default routing settings.  
Syntax:  
#fadefault  
Parameters:  
None  
#IRRMTADD Command  
The #IRRMTADD sets the IR channel. The IR channel for the Switcher and the  
IR Remote Control Unit must be the same.  
Syntax:  
#irrmtadd param1  
Parameters:  
param1  
State  
[0 - 3]  
Meaning  
Value  
0
1
2
3
IR channel 0  
IR channel 1  
IR channel 2  
IR channel 3  
21  
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RS-232 COMMANDS  
#LOCKPOWER Command  
The #LOCKPOWER enables/disables the power lock state. Enabling this  
feature will store the 5V status for each input prior to shutting the unit down.  
This preserves the 5V state when the unit is restarted.  
Syntax:  
#lockpower param1  
Parameters:  
param1  
State  
[0 - 1]  
Meaning  
Value  
0
1
Disable Power Lock  
Enable Power Lock  
#STBYMODE Command  
The #STBYMODE command toggles the Standby Mode state. When the  
Switcher is powered OFF (not unplugged), then the unit is in Standby Mode.  
Executing this command from Standby Mode will power ON the Switcher.  
Syntax:  
#stbymode param1  
Parameters:  
param1  
Mode  
[0 - 1]  
Meaning  
Value  
0
1
Normal Mode  
Standby Mode  
22  
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RS-232 COMMANDS  
Routing Commands  
The following command does not require the ‘#’ character. A carriage return must  
be added to the end of the command.  
Command  
Description  
R
Routing command  
R Command  
The R command switches to the specied input.  
Syntax:  
r param1  
Parameters:  
param1  
DisplayPort Input  
[1 - 4]  
23  
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TELNET CONTROL  
The Gefen 4x1 DPKVM Switcher supports Telnet for controlling the Switcher  
over a network. To access this feature, an IP address, subnet, gateway, and port  
numbers need to be set correctly. Consult the network administrator to obtain the  
proper IP address and settings for this product to properly communicate with the  
Switcher over a network.  
The Telnet control must be congured using RS-232 commands. Once properly  
congured, enter the IP address that was assigned to the Switcher using a  
terminal program or other Telnet client.  
1. Connect the Switcher to a computer using RS-232.  
2. Use a terminal emulation program (e.g. HyperTerminal, PuTTY, Indigo,  
etc.) to connect to the Switcher. See page 14 for information on RS-232  
conguration.  
IMPORTANT: When using HyperTerminal under Windows XP,  
the LF (line feed) character option must be enabled.  
3. Apply power to the Switcher. Information similar to the following will be  
displayed in the terminal window:  
===================================================  
GEFEN  
DISPLAY PORT 441  
FW version: 1.3  
===================================================  
4. Use the #ipcongcommand to display the current IP settings. The factory  
(default) settings are displayed below:  
#ipcong  
------------------- TCP/IP settings ---------------  
MAC addr  
IP addr  
Net Mask  
Gateway  
Web Server Port  
Telnet Server Port  
= 00:1C:91:02:40:00  
= 192.168.0.70  
= 255.255.255.0  
= 192.168.0.1  
= 80  
= 23  
Telnet password on login is set to ON  
Note that the Telnet password is set to ON. A user name and password can  
be set for additional security. This option can be disabled. See page 20 for  
details.  
24  
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TELNET CONTROL  
5. Use the #sipaddcommand to set the IP address for the Switcher. Check  
with a network administrator to obtain an available address, if necessary.  
DHCP is not supported by this Switcher.  
#sipadd 192.168.2.234  
New IP set to: 192.168.2.234  
After setting the IP address, power-cycle the Switcher for the changes to  
take effect.  
IMPORTANT: All IP conguration changes will require the  
Switcher to be power-cycled.  
6
Specify the IP of the Switcher in the Telnet client. In this example, the IP  
address is set to 192.168.2.234. Once connected to the Switcher, the Telnet  
client will display a screen similar to the following:  
----------- Welcome to DP441 Telnet Server ----------  
You are user number 1 of 3 allowed.  
You will be disconnected after 10 minutes of inactivity.  
Login: Admin  
Password: Admin  
Type Cmd:  
By default, the user name and password options are enabled by use of  
the #use_telnet_passcommand (see page 20). Once this command  
is enabled, the Switcher will prompt for both the user name and password.  
The password cannot be disabled from the login process. Once logged in,  
the Type Cmdprompt will be displayed.  
The Telnet interface uses the same commands and syntax that are used with  
RS-232 control. See the command list, starting on page 15.  
25  
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FIRMWARE UPDATE  
Firmware Update Procedure  
Any terminal emulation program can be used to perform the upgrade  
process. The instructions below is outlined for Windows® HyperTerminal.  
1. Connect an RS-232 cable between the Switcher and the computer running  
the terminal program. Verify the correct serial port settings (see page 14).  
2. Type the #activebolocommand then press the [ENTER] key.  
3. Repeat Step 2.  
The following will be displayed on the screen:  
================== Main Menu ========================  
Download new program -------- 1  
Cancel ---------------------- 2  
=====================================================  
4. Press [1] on the computer keyboard to begin downloading program to the  
temporary memory.  
5. The following message will be displayed:  
Waiting for the le to be sent ... (press ‘a’ to abort)  
6. In Hyperterminal, click Transfer > Send File...  
7. Click Browse... and select the .bin le to be uploaded (e.g. 1x4splitter.bin).  
8. Select the Ymodem protocol.  
9. Click Send on the Send File dialog box.  
10. After a few moments, a message will appear in Hyperterminal:  
Programming Completed Successfully!  
26  
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RACK EAR INSTALLATION  
Installing the Rack Ears  
Rack mount ears are provided for installation of this unit into a 1U rack mount  
space.  
1. Locate the side screws on the unit.  
2. Remove the front 2 screws that are located closest to the front of the unit.  
3. Using the removed screws, screw the rack mounting bracket into the unit.  
4. Repeat the procedure on the opposite side of the unit.  
Front of unit  
Rear of unit  
27  
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SPECIFICATIONS  
Maximum Pixel Clock................................................................................360 MHz  
Video Input Connectors.......................................................(4) DisplayPort, female  
Video Output Connector......................................................(1) DisplayPort, female  
USB Input Connectors..............................................................(4) USB 2.0 Type B  
USB Output Connectors............................................................(2) USB 2.0 Type A  
Audio Input Connectors.......................................................(4) 3.5 mm mini-stereo  
Audio Output Connector.......................................................(1) 3.5 mm mini-stereo  
RS-232 Connector.........................................................................(1) DB-9, female  
Ethernet Connector................................................................... (1) RJ-45, shielded  
IR Extender Connector........................................................ (1) 3.5 mm mini-stereo  
Power Supply .............................................................................................. 5V DC  
Power Consumption ...................................................................... 10W (max.)  
Dimensions.................................................................. 17.1” W x 1.75” H x 4.25” D  
Shipping Weight ............................................................................................ 4 lbs.  
28  
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WARRANTY  
Gefen warrants the equipment it manufactures to be free from defects in material  
and workmanship.  
If equipment fails because of such defects and Gefen is notied within two (2)  
years from the date of shipment, Gefen will, at its option, repair or replace the  
equipment, provided that the equipment has not been subjected to mechanical,  
electrical, or other abuse or modications. Equipment that fails under conditions  
other than those covered will be repaired at the current price of parts and labor in  
effect at the time of repair. Such repairs are warranted for ninety (90) days from  
the day of reshipment to the Buyer.  
This warranty is in lieu of all other warranties expressed or implied, including  
without limitation, any implied warranty or merchantability or tness for any  
particular purpose, all of which are expressly disclaimed.  
1. Proof of sale may be required in order to claim warranty.  
2. Customers outside the US are responsible for shipping charges to and from  
Gefen.  
3. Copper cables are limited to a 30 day warranty and cables must be in their  
original condition.  
The information in this manual has been carefully checked and is believed to  
be accurate. However, Gefen assumes no responsibility for any inaccuracies  
that may be contained in this manual. In no event will Gefen be liable for  
direct, indirect, special, incidental, or consequential damages resulting from  
any defect or omission in this manual, even if advised of the possibility of such  
damages. The technical information contained herein regarding the features and  
specications is subject to change without notice.  
For the latest warranty coverage information, refer to the Warranty and Return  
PRODUCT REGISTRATION  
Please register your product online by visiting the Register Product page  
under the Support section of the Gefen Web site.  
29  
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Rev A2  
20600 Nordhoff St., Chatsworth CA 91311  
1-800-545-6900 818-772-9100 fax: 818-772-9120  
Pb  
This product uses UL listed power supplies.  
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