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Masking

Command

Description

#mask

Masks the video on the specified output(s)

#show_mask

Displays the current masking status of each output

#unmask

Unmasks the specified outputs

#mask

The

#mask

command masks the video on the specified output(s). If

param1

= 0, then all

outputs are masked. Use the

#unmask

command to disable output masking.

Syntax

#mask param1

Parameters

param1

Output

...

Example

#mask 1
OUTPUT 1 IS MASKED

Commands

Advanced Operation

Содержание GTB-HD4K2K-642-BLK

Страница 1: ...Audio Embedder 3GSDI Release A4 User Manual GTB HD4K2K 642 BLK 60Hz 4 2 0 6 2 SOURCES DISPLAYS x Matrix for HDMI with Ultra HD 4K x 2K support...

Страница 2: ...eplacement of the obsolete outlet 10 Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus 11 Only use a...

Страница 3: ...ale 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...

Страница 4: ...a trademark of Gefen LLC Important Notice Gefen LLC reserves the right to make changes in the hardware packaging and any accompanying documentation without prior written notice HDMI the HDMI logo and...

Страница 5: ...outputs if any connected device or display is not capable of processing Deep Color This automatic behavior ensures compatibility among all output devices in a mixed device environment This feature ca...

Страница 6: ...binary forms with or without modification are permitted provided that the following conditions are met 1 Redistributions of source code must retain the above copyright notice this list of conditions...

Страница 7: ...and DVI displays with HDMI to DVI adapters not included RS 232 Serial interface for remote control using a computer or automation control system IP control via Telnet UDP and the built in web server i...

Страница 8: ...e Current Routing State 12 Routing Inputs to Outputs 13 Using the IR Remote Control Unit 14 Using the IR Extender 15 Switching Modes 16 What is Fast Switching Technology 16 Fast Mode vs Slow Mode 16 S...

Страница 9: ...Setup HDCP 90 Manage EDID Assign 91 Manage EDID Bank Names 94 Manage EDID Upload Download 95 Configuration Change IP Settings 97 Configuration Telnet Login Settings 98 Configuration UDP Connection Se...

Страница 10: ......

Страница 11: ...HDMI with Ultra HD 4K x 2K support 01 Getting Started Panel Layout 2 IR Remote Control Unit 5 Front 5 Back 6 Installing the Battery 7 Setting the IR Channel 7 Installation 8 Connecting the 6x2 Matrix...

Страница 12: ...page 2 Panel Layout 9 10 11 12 13 14 8 2 7 3 4 5 6 1 Getting Started...

Страница 13: ...more information on using this feature 5 EDID Int Ext Custom Use this recessed button to switch between internal external and custom EDID modes The Int Ext and Custom LED indicators will display the...

Страница 14: ...on 10 IR Ext Connect an IR Extender Gefen part no EXT RMT EXTIRN to this port 11 USB Used for upgrading the firmware See Firmware Upgrade Procedure for more information 12 IR This IR sensor receives s...

Страница 15: ...1 6 are used to select the input Buttons A and B are used to select the output Out 1 and Out 2 The remaining buttons are not used See Using the IR Remote Control Unit for more information IR Remote C...

Страница 16: ...the IR Channel for more information 2 Primary battery slot shown without battery Holds the battery for operating the remote Use only 3V CR2032 type batteries Make sure that the positive side of the b...

Страница 17: ...cover Setting the IR Channel In order for the included IR remote control to communicate with the 6x2 Matrix for HDMI 4K x 2K the IR remote control must be set to the same channel as the matrix Use th...

Страница 18: ...audio from the source that is routed to Out 2 4 OPTIONAL Connect an RS 232 cable from the RS 232 port on the matrix to the RS 232 connector on the serial controller 5 OPTIONAL Connect an Ethernet cabl...

Страница 19: ...2K 642 HDMI CABLE Ultra HD Source Ultra HD Source Ultra HD Source Ultra HD Matrix for HDMI Network IP Control CAT 5 CABLE RS 232 CABLE Ultra HD Source Ultra HD Source Ultra HD Display Ultra HD Display...

Страница 20: ......

Страница 21: ...Determining the Current Routing State 12 Routing Inputs to Outputs 13 Using the IR Remote Control Unit 14 Using the IR Extender 15 Switching Modes 16 What is Fast Switching Technology 16 Fast Mode vs...

Страница 22: ...ng state of Out 1 The next row displays the routing state of Out 2 A row of numbers 1 6 is printed above the two rows of LED indicators Each LED indicator represents an input In 1 In 6 on the matrix T...

Страница 23: ...rce connected to In 5 is currently routed to Out 2 To change the routing state and route In 6 to Out 2 press and release the Out 2 button To route another source to Out 2 consecutively press and relea...

Страница 24: ...is routed to Out 2 Let s change the routing state so that In 6 is routed to Out 2 1 Point the IR remote at the IR sensor on the top panel of the matrix 2 The output must always be selected first Sinc...

Страница 25: ...s case an IR extender Gefen part no EXT RMT EXTIRN can be connected to the IR Ext port on the matrix The sensor on the IR extender behaves exactly like the sensor on the top panel of the matrix Always...

Страница 26: ...routed to any other HDTV display in the same system Fast Mode vs Slow Mode Use fast switching mode to improve performance when connecting disconnecting Hi Def sources and powering ON OFF HDTV display...

Страница 27: ...CM 8 channel Dolby Digital Dolby Digital Plus Dolby TrueHD DTS DTS HD Master Audio MLP PPCM Press the Audio button to switch the audio mode Audio Modes NOTE In order for the audio channel mode to be s...

Страница 28: ...ces External EDID When set to Ext mode EDID data will be fetched from each display or other sink device that is connected to the outputs of the matrix Once this information is gathered the matrix buil...

Страница 29: ...280 x 720p 59 60 16 9 1920 x 1080i 59 60 16 9 1440 x 480i 59 60 4 3 1920 x 1080p 59 60 16 9 720 x 576p 50 4 3 720 x 576p 50 16 9 1280 x 720p 50 16 9 1920 x 1080i 50 16 9 1440 x 576i 50 4 3 1920 x 1080...

Страница 30: ......

Страница 31: ...5 Status 75 Web Interface 79 Using the built in Web Server 79 Main Routing 80 Main I O Status 83 Main Display Info 85 I O Setup Preset Names 86 I O Setup I O Names 87 I O Setup HPD Control 88 I O Setu...

Страница 32: ...rol None IMPORTANT When sending Telnet or RS 232 commands a carriage return 0d and a line feed 0a must be included at the end of the command DA 15 DE 9 DB 25 DC 37 DD 50 5 6 4 7 3 8 2 9 1 DCD RXD TXD...

Страница 33: ...al and use the RS 232 settings listed on the previous page 3 Set the IP address for the matrix using the sipadd command 4 Set the subnet mask using the snetmask command 5 Set the gateway router IP add...

Страница 34: ...he remote UDP IP address set_udp_remote_port Sets the remote UDP listening port show_hdcp Displays the HDCP status of the specified input show_ir Displays the current IR channel of the matrix show_out...

Страница 35: ...ho The echo command enables disables toggles the RS 232 feedback Syntax echo param1 Parameters param1 Value 0 1 Value Description 0 Disable feedback 1 Enable feedback Example echo 1 LOCAL ECHO ENABLED...

Страница 36: ...matrix to factory default settings Outputs are unmasked and all IP and UDP settings are reset to default settings Syntax fadefault Parameters None Example fadefault MATRIX WAS RESET TO FACTORY DEFAULT...

Страница 37: ...Input 1 6 param2 Value 0 1 Value Description 0 Disable 1 Enable Example hdcp 2 1 HDCP ON INPUT 2 IS ENABLED NOTE Some computers will enable HDCP if an HDCP compliant display is detected Set param2 1...

Страница 38: ...sically disconnecting and reconnecting the cable between the source and the matrix If param1 0 then all inputs will receive the HPD pulse Syntax hpd_pulse param1 Parameters param1 Input 1 6 Example hp...

Страница 39: ...ocal EDID by disabling the automatic loading of the downstream EDID when the matrix is powered Syntax lock_edid param1 Parameters param1 Value 0 1 Value Description 0 Disable 1 Enable Example lock_edi...

Страница 40: ...30 power The power command toggles power on the matrix Syntax power param1 Parameters param1 Value 0 1 Value Description 0 Off 1 On Example power 0 POWER OFF power 1 POWER ON Commands Advanced Operat...

Страница 41: ...equivalent of disconnecting and reconnecting the AC power cord on the back of the matrix The matrix must be rebooted after changing any of the IP settings Syntax reboot Parameters None Example reboot...

Страница 42: ...STRING Source Description default Uses default external EDID dynamic Uses dynamic EDID bank Uses EDID bank output Uses EDID on Output sink param2 Source 0 8 Source Description 0 Default EDID Dynamic...

Страница 43: ...id default 0 input 2 COPY DEFAULT EDID TO INPUT 4 set_edid output 2 input 3 COPY OUTPUT 2 EDID TO INPUT 3 set_edid dynamic 0 input 2 COPY DYNAMIC EDID TO INPUT 2 set_edid bank 3 input 4 COPY BANK 3 ED...

Страница 44: ...can also be set under the Configuration tab within the Web interface See Configuration System Configuration for more information Syntax set_ir param1 Parameters param1 Channel 0 3 Channel Description...

Страница 45: ...t The default port setting is 21 The matrix must be rebooted after executing this command Use the show_udp_port command to display the current local UDP listening port Syntax set_udp_port param1 Param...

Страница 46: ...fied using dot decimal notation The default UDP remote IP address is 192 168 1 255 The matrix must be rebooted after executing this command Syntax set_udp_remote_ip param1 Parameters param1 UDP addres...

Страница 47: ...ote UDP listening port The default remote UDP listening port is 50008 The matrix must be rebooted after executing this command Syntax set_udp_remote_port param1 Parameters param1 Port 0 65535 Example...

Страница 48: ...ified input Syntax show_hdcp param1 Parameters param1 Input 1 6 Example show_hdcp 1 HDCP ON INPUT 1 IS ENABLED show_ir The show_ir command displays the IR channel of the matrix Syntax show_ir Paramete...

Страница 49: ...pecified display based on the EDID If no display is attached to the specified output then the command will return There is no information from output X Syntax show_out_colordpt param1 Parameters param...

Страница 50: ...and will return NO SIGNAL Syntax show_out_res Parameters param1 Output 1 2 Example show_out_res 1 OUTPUT 1 RESOLUTION IS 1600x900P show_udp_port The show_udp_port command displays the current local UD...

Страница 51: ...Parameters None Example set_udp_remote_ip 192 168 1 227 UDP REMOTE ADDRESS IS 192 168 1 227 show_udp_remote_port The show_udp_remote_port command displays the remote UDP listening port Use the set_udp...

Страница 52: ...udp_enable command enables or disables UDP access mode Syntax use_udp_enable param1 Parameters param1 Value 0 1 Value Description 0 Disable UDP 1 Enable UDP Example use_udp_enable 1 UDP ACCESS IS ENAB...

Страница 53: ...ymbol param1 must be set to 1 If param1 0 then the routing state for all outputs is returned Syntax n param1 Parameters param1 Output 0 2 Example n 1 INPUT 1 IS ROUTED TO OUTPUT 1 n 2 INPUT 3 IS ROUTE...

Страница 54: ...s command routes the specified input to all outputs Do not precede this command with the symbol Syntax s param1 Parameters param1 Input 1 6 Examples s 2 INPUT 2 IS ROUTED TO ALL OUTPUTS Commands Advan...

Страница 55: ...pecified input fst_fast The fst_fast command sets the specified inputs to fast switching mode If param1 0 then all inputs are set to fast switching mode By default all inputs are set to fast switching...

Страница 56: ...ult all inputs are set to fast switching mode If param1 0 then all inputs are set to slow switching mode Syntax fst_slow param1 Parameters param1 Input 0 6 Examples fst_slow 2 INPUT 2 FST STATUS IS SE...

Страница 57: ...or all inputs are displayed Syntax show_fst param1 Parameters param1 Input 0 6 Examples show_fst 2 INPUT 1 FST STATUS IS SLOW show_fst 0 INPUT 1 FST STATUS IS SLOW INPUT 2 FST STATUS IS SLOW INPUT 3 F...

Страница 58: ...I sgateway Sets the IP address of the router gateway show_gateway Displays the current gateway address of the matrix show_http_port Displays the current HTTP listening port of the matrix show_ip Displ...

Страница 59: ...y_telnet_welcome Parameters param1 Value 0 1 Value Description 0 Disable welcome message 1 Enable welcome message Examples display_telnet_welcome 1 TELNET WELCOME SCREEN IS ENABLED Notes When this opt...

Страница 60: ...pconfig The ipconfig command displays the current TCP settings Syntax ipconfig Parameters None Examples ipconfig IP CONFIGURATION IS IP 192 168 2 190 SN 255 255 255 0 GW 192 168 2 1 Commands Advanced...

Страница 61: ...IP configuration to factory default settings The matrix must be rebooted after executing this command Syntax resetip Parameters None Examples resetip IP Configuration Was Reset To Factory Defaults Ple...

Страница 62: ...booted after executing this command The default port setting is 80 Use the show_http_port command to display the current HTTP listening port Syntax set_http_port param1 Parameters param1 Port 1 1024 E...

Страница 63: ...sword Example set_telnet_pass 3ver3st TELNET INTERFACE PASSWORD IS SET set_telnet_port The set_telnet_port command sets the Telnet listening port The matrix must be rebooted after executing this comma...

Страница 64: ...n Syntax set_webui_ad_pass param1 Parameters param1 Password Example set_webui_ad_pass bossman WEB UI ADMINISTRATOR PASSWORD IS SET set_webui_op_pass The set_webui_ad_pass command sets the Operator pa...

Страница 65: ...The default gateway is 192 168 1 1 Syntax sgateway param1 Parameters param1 Gateway Example sgateway 192 168 1 5 GATEWAY ADDRESS 192 168 1 5 IS SET PLEASE REBOOT THE UNIT show_gateway The show_gatewa...

Страница 66: ...e set_http_port command to set the HTTP listening port Syntax show_http_port Parameters None Example show_http_port HTTP COMMUNICATION PORT IS 82 show_ip The show_ip command displays the current IP ad...

Страница 67: ...meters None Example show_mac_addr MAC ADDRESS IS 10 12 34 56 79 aa show_netmask The show_netmask command displays the current net mask of the matrix Use the snetmask command to set the net mask Syntax...

Страница 68: ...stening port Syntax set_telnet_port param1 Parameters None Example show_telnet_port TELNET COMMUNICATION PORT IS 24 show_telnet_username The show_telnet_username command displays the user name of the...

Страница 69: ...er_data The show_ver_data command displays the current software and hardware version Syntax show_ver_data Parameters None Example show_ver_data SOFTWARE VERSION V1 0G HARDWARE VERSION B Commands Advan...

Страница 70: ...ix must be rebooted after executing this command The default IP address is 192 168 1 72 Use the show_ip or ipconfig command to display the current IP address of the matrix Syntax sipadd param1 Paramet...

Страница 71: ...be rebooted after executing this command The default net mask is 255 255 255 0 Use the show_netmask or ipconfig command to display the current net mask of the matrix Syntax snetmask param1 Parameters...

Страница 72: ...ssion The default setting is 0 disabled Use the set_telnet_pass command to set the Telnet password Syntax use_telnet_pass param1 Parameters param1 Value 0 1 Value Description 0 Disable password 1 Enab...

Страница 73: ...status of each output unmask Unmasks the specified outputs mask The mask command masks the video on the specified output s If param1 0 then all outputs are masked Use the unmask command to disable out...

Страница 74: ...param1 Output 1 2 Example show_mask 1 OUTPUT 1 ARE MASKED unmask The unmask command unmasks the specified output s Use the mask command to mask the specified output s If param1 0 then all outputs are...

Страница 75: ...to the specified input set_output_name Assigns a name to the specified output set_preset_name Assigns a name to the specified preset show_bank_name Displays the name for the specified EDID bank show_...

Страница 76: ...e matrix When the matrix is locked all functions are disabled including the front panel RS 232 and Telnet Syntax lock_matrix param1 Parameters param1 Value 0 1 Value Description 0 Unlock 1 Lock Exampl...

Страница 77: ...Preset 1 8 Example recall_preset 2 RECALLED THE ROUTING STATE SAVED TO PRESET 2 save_preset The save_preset command saves the current routing state to a specified preset Syntax save_preset param1 Par...

Страница 78: ...ameters param1 Bank 1 8 param2 Name Example set_bank_name 5 Dell24 Dell24 NAME IS ASSIGNED TO BANK 5 set_input_name The set_input_name command assigns a name to the specified input on the matrix Synta...

Страница 79: ...utput is limited to 15 characters Names longer than 15 characters will be truncated To name an output use the set_output_name command Syntax set_output_name param1 param2 Parameters param1 Output 1 2...

Страница 80: ...e name of the preset is limited to 8 characters To display the name of a preset use the show_ preset_name command Syntax set_preset_name param1 param2 Parameters param1 Preset 1 8 param2 Name Example...

Страница 81: ...e param1 Parameters param1 Bank 1 8 Example show_bank_name 5 THE NAME FOR BANK 5 IS Dell24 show_input_name The show_input_name command displays the name of the specified input To name an input use the...

Страница 82: ...param1 Output 1 2 Example show_output_name 2 THE NAME FOR OUTPUT 2 IS Sony_XBR show_preset_name The show_preset_name command displays the name for the specified preset To assign a name to a preset use...

Страница 83: ...nd displays the current routing status of the output The name of the output and input are displayed Syntax show_r param1 Parameters param1 Output 1 2 Example show_r 2 OUTPUT 2 IS ROUTED TO VIDEO INPUT...

Страница 84: ...nd If param2 0 then the specified input param1 will be routed to all outputs param3 is optional but can be used to specify another output on the command line Syntax r param1 param2 param3 Parameters p...

Страница 85: ...input show_rsense Displays the RSENSE status of the output m Displays the current routing status of the matrix help The help command displays the list of available RS 232 Telnet commands Help on a spe...

Страница 86: ...irmware Syntax show_fw Parameters None Example show_fw FIRMWARE VERSION V1 0G show_hpd The show_hpd command displays the HPD status of the specified output The name of the output is included Syntax sh...

Страница 87: ...ced Operation show_rsense The show_rsense command displays the RSENSE status of the specified output Syntax show_rsense param1 Parameters param1 Output 1 2 Example show_rsense 2 RSENSE OF OUTPUT 1 IS...

Страница 88: ...ix Masking and locking status of the matrix is also provided Do not precede the m command with the symbol Syntax m Parameters None Example m OUTPUT 1 IS ROUTED TO INPUT 3 OUTPUT 2 IS ROUTED TO INPUT 3...

Страница 89: ...me from the drop down list Options Operator Administrator Administrator login provides unrestricted access to all features and settings Operator login limits access to matrix routing display informati...

Страница 90: ...desired tab sub tab to open the desired page Main Routing Advanced Operation Web Interface NOTE In order to view all four tabs at the top of the screen the user must be logged in as Administrator If...

Страница 91: ...lect the currently active output Input Inputs Click the radio button next to the desired input to be routed Name Inputs Displays the current name of the input This name can be changed using the set_in...

Страница 92: ...ocked settings cannot be changed using the front panel buttons or through the Web GUI When the matrix is locked the button text will read Unlock Matrix and a red bar will appear across the top portion...

Страница 93: ...e output The name of the output can be changed using the set_output_name command or through the I O Setup I O Names page of the Web interface RSENSE Displays the current Rsense state Mask Displays the...

Страница 94: ...eb Interface Input Displays the state of each input for each of the following Input name Color Depth Color Space HDCP 3D Active Signal Vertical Resolution Horizontal Resolution Progressive Interlaced...

Страница 95: ...EDID from the drop down list The selected EDID will be copied from the Output or selected EDID Bank to the desired input s and used by the source Options Bank 1 Bank 8 Output 1 Output 2 Feature Audio...

Страница 96: ...etup Preset Names Preset The number of each preset Name Type the desired name of each preset in these fields Save Changes Saves the current changes to the name of the preset s Cancel Restores the prev...

Страница 97: ...the desired name of each output in these fields Input The number of each input Name Input Type the desired name of each the input in these fields Save Changes Saves the current changes to the name of...

Страница 98: ...using the set_input_name command or through the I O Setup I O Names page of the Web interface Pulse Click the Pulse button to cycle the HPD line on the desired input This is the equivalent of physica...

Страница 99: ...hing state of each input Input The name of the input Name The name of the input The name of each input can be changed using the set_input_name command or through the I O Setup I O Names page of the We...

Страница 100: ...Web interface Check All Places a check mark in all boxes under the Disable column Clear All Clears all check marks from the Disable column Set Click this button to save changes for all input s Cancel...

Страница 101: ...abled the EDID locked on power cycle message will be displayed in red The local EDID information will now be locked once the matrix is rebooted Click the Unlock EDID button to disable the Lock EDID fe...

Страница 102: ...he desired input s These check boxes can only be used when the EDID Mode is set to Custom User EDID Modes Select the EDID mode from the drop down list Options Internal 1080p 2 ch audio Internal 1080p...

Страница 103: ...k device connected to Output 1 Custom Last Output Uses the EDID from the last output on the matrix For example this matrix has a total of two outputs If a sink device is connected to both Out 1 and Ou...

Страница 104: ...EDID Bank Names Bank Indicates the EDID bank number Name Type the desired name of the EDID bank in this field Save Changes Saves the current name change to the EDID bank s Cancel Restores the previou...

Страница 105: ...wnload Browse Click this button to select the EDID file to be uploaded Select Bank Location Click this drop down list to select the bank to where the EDID will be uploaded Options 1 Bank1 8 Bank8 Uplo...

Страница 106: ...e to Download Click this box to select the EDID that is to be saved to a file The EDID file will be saved in binary bin format Options 1 BANK1 8 BANK8 1 OUTPUT1 2 OUTPUT2 1 INPUT1 6 INPUT4 Download Cl...

Страница 107: ...Settings Saves the current settings for the Change IP Settings After clicking this button the Web interface will display a dialog indicating that the matrix must be rebooted for changes to take effec...

Страница 108: ...to have the matrix prompt for a password each time a Telnet session is started This box must be checked in order to change the Telnet Login credentials Show Login Message on Connect Click this check...

Страница 109: ...ion Web Interface Remote UDP IP Address Type the remote UDP IP address in this text box Remote UDP Port Enter the remote UDP port in this text box Enable UDP Access Check this box to enable UDP access...

Страница 110: ...select the user name The credentials for the selected user name can now be changed Old Password Type the current old password in this field New Password Type the new password in this field Confirm Pa...

Страница 111: ...page 101 Configuration System Configuration continued on next page Advanced Operation Web Interface Download Click this button to download the current matrix configuration to a file...

Страница 112: ...matrix Update Updates the matrix with the selected firmware file Browse Click this button to select the saved configuration file to be loaded into memory Browse Click this button to select the firmwar...

Страница 113: ...efault settings The IP settings are preserved Reboot Click this button to reboot the matrix IR Channel Click this drop down list to set the desired IR channel for the matrix Note that the matrix and t...

Страница 114: ......

Страница 115: ...DISPLAYS x Matrix for HDMI with Ultra HD 4K x 2K support 04 Appendix Wall Mounting Instructions 106 Firmware Upgrade Procedure 107 Upgrading using the Web interface 107 Upgrading using the USB port 1...

Страница 116: ...of the unit and any walls or vertical surfaces to allow for enough clearance for insertion and retraction of cables at the HDMI connectors For installation on a drywall surface use a 6 drywall screw...

Страница 117: ...ders from the 6x2 Matrix for HDMI 4K x 2K during the update process 5 Click the Configuration tab in the Web interface and click the Browse button under the System Configuration section 6 Select the f...

Страница 118: ...for HDMI 4K x 2K a removable disk icon will be displayed under My Computer 5 Extract the firmware file from the ZIP file and drag the bin file to the Removable Disk 6 Disconnect the USB cable from the...

Страница 119: ...t type recessed push button Power Indicator 1 x LED blue FST Indicators 2 x LED green Audio Indicators 2 x LED green EDID Indicators 3 x LED green Routing Indicators 12 x LED green Connectors Video In...

Страница 120: ...Appendix page 110 Appendix Physical Dimensions W x H x D 6 9 x 11 9 x 1 0 175mm x 302mm x 26mm Unit Weight 1 4 lbs 0 6 kg Specifications...

Страница 121: ......

Страница 122: ...t uses UL listed or CE compliant power supplies 20600 Nordhoff St Chatsworth CA 91311 1 800 545 6900 818 772 9100 fax 818 772 9120 www gefen com support gefen com Pb Stretch it Switch it Split it Gefe...

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