ATEN Technology KH2508A manuale d’uso

KVM Switch KH2508 A / KH2516 A User Manual www.aten.com[...]

KH2508A / KH2516A User Manual ii FCC Information This is an FCC Class A product. In a domestic environment this product may cause radio interference in which cas e the user may be required to tak e adequate measures. This equipment has been test ed and found to comply with the limit s for a Class A digital device, pursuant to Part 15 of the FCC Rul[...]

KH2508A / KH2516A User Manual iii User Information Online Registration Be sure to register your product at our online support center: T elephone Suppo rt For telephone support, call this number: User Notice All information, docum entation, and specifications contained in this manual are subject to change without prior no tification by the manufactu[...]

KH2508A / KH2516A User Manual iv Package Content s The KH2508 A / KH2516 A package consists of: 1 KH2508 A or KH2516 A Cat 5 High-Density KVM Switch 1 Firmware Upgrade Cable 1P o w e r C o r d 1 Grounding Wire 1 Rack Mount Kit 1 Foot P ad Set (4 pcs .) 1 User Manual* 1 Quick Start Guide Check to make sure that all of the co mponents are present and[...]

KH2508A / KH2516A User Manual v Content s FCC Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii RoHS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii SJ/T 11364-2006. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

KH2508A / KH2516A User Manual vi Hot Plugging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Hot Plugging Stations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Hot Plugging KVM Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Hot Plugging[...]

KH2508A / KH2516A User Manual vii Chapter 6. Keyboard Emulation Mac Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 Sun Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Chapter 7. The Firmware Upgrade Utility Introduction . . . . . . . . .[...]

KH2508A / KH2516A User Manual viii About This Manual This User Manual is provided to help you get the most from your KH2508 A / KH2516 A system. It covers all aspects of installation, co nfigu ration and operation. An overview of th e information found in the manual is provided below. Chapter 1, Introduct ion, introduces you to the KH2508 A / KH2 5[...]

KH2508A / KH2516A User Manual ix Conventions This manual uses the following conv entions: Product Information For information about all ALTUSEN products and ho w they can help you connect without limi ts, visit ALTUSEN on the W eb or contact an ALTUSEN Authorized Reseller. Visit ALTUSEN on the Web for a list of locations and telephone numbers: Mono[...]

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1 Chapter 1 Introduction Overview A KH2508 A /KH2516 A KVM switch is a control unit that allows IT administrators to access and control multi ple computers from two PS/2 or USB KVM (keyboard, monitor, and mo use) c onsoles. Operators working at up to two consoles can independently and sim ultaneously take control of up to 8 (KH2508 A ), or 16 (KH2 [...]

KH2508 A / KH2516 A User Manual 2 Features and Benefit s The features and benef its provided by a KH2508 A / KH251 6 A deployment are described in the follow ing table: Features Benefits T wo C onsoles Control T wo KVM consol es independently and simultaneously control up to 8 or 16 directly connected compute rs. Scalability By daisy chaining up to[...]

Chapter 1. Introduction 3 Auto Scanning and Broadcast Mode Auto scanning provides hands-f ree monitoring of selected devices at variable rates. Broadcast Mode sen ds commands from the console to all comput ers – allowing you to perfor m operations (such as software installation, upgrades, shutdowns, etc.), on them simultaneously Superior Video Qu[...]

KH2508 A / KH2516 A User Manual 4 Requirement s Consoles  A VGA, SVGA, or multisync monitor capable of the hig hest resolution that you will be using on any co mputer in the instal lation  A PS/2 or USB mouse  A PS/2 or USB keyboard Computers The following equipment m ust be installe d on the computers that connect to the KH2508 A or KH251[...]

Chapter 1. Introduction 5 KVM Adapter Cables  Cat 5e/6 cable is req uired to connect the KH2508 A / KH2516 A to one of the KVM adapter cables.  The following KVM adapter cables are required for use w ith the KH2508 A / KH2516 A : Note: 1. KVM adapter cables are referred to a s I/O Modules in some dialog boxes. 2. The following cable models su[...]

KH2508 A / KH2516 A User Manual 6 Component s Front V iew KH2508 A KH2516 A 5 4 3 6 1&2 78 5 4 3 6 1&2 78[...]

Chapter 1. Introduction 7 No. Component D escription 1 Port Selection Pushbuttons  Press a pushbutton to give the KVM focus to the computer attached to its corresponding port.  Simultaneously pressing Pushbuttons 1 and 2 for 3 seconds performs a keyboard and mouse reset.  Simultaneously pressing Pushbuttons 7 and 8 of the KH2508 A or Butto[...]

KH2508 A / KH2516 A User Manual 8 Rear V iew KH2508 A KH2516 A 12 7 45 6 3 12 7 45 6 3[...]

Chapter 1. Introduction 9 No. Component Description 1 Power Socket The power cord to the AC source plugs in here. 2 Power Switch This is a standard rocker switch that powers the KH2508 A / KH2516 A on and off. 3 Daisy Chain Ports When daisy chaining units (see Daisy Chaining , page 17), the daisy chain cables plug in here. The port on the left is t[...]

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11 Chapter 2 Hardware Setup Overview For convenience and flexibili ty that allows mixing the PS/ 2, USB and serial interfaces, the KH2508 A / KH2516 A 's design utilizes KVM adapter cables that serve as intermediaries between the KVM switch and the connected devices: A separate KVM adapter cable is requ ired for each computer or device connect[...]

KH2508 A / KH2516 A User Manual 12 St acking and Rack Mounting The KH2508 A / KH2516 A can be stacked on the desktop or rack mounted at the front or rear of the rack. The following sections take you through the procedures for each method. Note: 1. Allow at least 5.1 cm on each side for adequate ventilation and 12.7 cm at the rear for pow er cord an[...]

Chapter 2. Hardware Setup 13 Rack Mounting The KH2508 A / KH2 516 A can be mounted in a 19" (1U) rack. The mounting brackets can screw into either the front or the back of the unit so that it can attach to the front or the back of the rack. To rack mount the unit: 1. Remove the screws at the front or the rear, as shown in the diagram below . 2[...]

KH2508 A / KH2516 A User Manual 14 Single St ation Inst allation In a single stage installation, there are no additional KVM switches daisy chained down from the KH2508 A / KH251 6 A . To set up a single stage installation, refer to the installatio n diagrams starting on page 15 (the numbers in the diagram correspond with the numbers of th e instru[...]

Chapter 2. Hardware Setup 15 Single St age Insta llation Diagram 5 4 3 1 2 3 b y A TEN PS/2 CPU MODUL E M ODEL NO. KA912 0 PS/2 CPU MODUL E M ODEL NO. KA912 0 LINK 2[...]

KH2508 A / KH2516 A User Manual 16 KVM Adapter Cable Installation Diagrams KA7120 KA7520 KA7920 KA9120 KA9520 b y A TEN LIN K KA7170 KA7570 KA7970 KA9170 KA9570 b y A TEN LIN K KA9140 SERIAL TERMINAL KA7130 KA9130 b y A TEN LIN K[...]

Chapter 2. Hardware Setup 17 Daisy Chaining To control even more computers, up to 31 additi onal KH2508 A / KH2516 A KVM switches can be daisy chai ned from the orig inal KH2508 A or KH2516 A . As many as 512 computers can be controlled from a single console in a complete installation. Note: A single console KVM switch can not be installed on a KH2[...]

KH2508 A / KH2516 A User Manual 18 Daisy Chain Inst allation Diagram[...]

19 Chapter 3 Basic Operation Port Selection KH2508 A / KH2516 A installations provide three method s to obtain instant access to any computer on y our installation: Manual, OSD (on-screen display), and Hotkey. Manual Manual port selection simply involves pressing the port selectio n switch that corresponds to the devi ce you wish to access. Note: B[...]

KH2508 A / KH2516 A User Manual 20 Hot Plugging The KH2508 A / KH2516 A supports hot pl ugging – components can be removed and added back into the instal lation by unplugging and rep lugging their cables without the n eed to shut the unit down. In order for hot plugging to work properly, ho wever, the procedures described below should be followed[...]

Chapter 3. Basic Operation 21 Powering Off and Rest arting If it becomes necessary to power off the KH2508 A / KH251 6 A , or if the switch loses power and needs to be restarted, before starting it back up it is suggeste d that you follow these pr ocedures to prevent poss ible equipment issues: 1. Shut down all the computers th at are attached to t[...]

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23 Chapter 4 OSD Operation OSD Overview The On Screen Display (OSD) is a menu d riven method to han dle computer control and switchi ng operations. All pr ocedures start from the OSD Main Screen. To display the Main Sc reen, tap the OSD hotkey twice. The default hotkey is [Scrol l Lock]. You can change the hotkey to the Ctrl key or the Alt key if y[...]

KH2508 A / KH2516 A User Manual 24 When you start the OSD, a screen similar to the one below appears: Note: 1. The image above is the Administra tor's Main Screen. The User Main Screen does not show the F4 and F6 functions, since these are reserved for the administrato r and cannot be accessed by users without administrator p rivileges. 2. Onl[...]

Chapter 4. OSD Operation 25 OSD Navigation  T o dismiss the menu, and d eactivate the OSD, click the X at the upper right corner of the OSD W indow or press Esc .  T o Logout click F8 or the Z Z Z symbol at the top of the Main Screen, or press [F8] .  The OSD uses a tree view . T o see the por ts for a particular station, click the plus si[...]

KH2508 A / KH2516 A User Manual 26 OSD Functions OSD functions are used to configure an d control the OSD. For example, you can rapidly switch to any port, scan selected ports only , limit the list you wish to view, designate a port as a Quick View Port, create or edit a port name, or make OSD setting adjustments. To access an OSD function: 1. Eith[...]

Chapter 4. OSD Operation 27 F2: LIST Many of the switch’s OSD functions only operate on the computers currentl y selected for listing on the Main Screen. Accessin g this function lets you broaden or narrow the scope of ports that get listed. The submenu choices and their meanings are given in the table below: Move the highligh t bar to the choice[...]

KH2508 A / KH2516 A User Manual 28 F3: SET Accessing this function allows the admini strator and each user to set up an individual working environm ent. A separate profile fo r each operator is stored by the OSD and is activated according to the username provided during login. To change a setting: 1. Double-click it; or move the highl ight bar to i[...]

Chapter 4. OSD Operation 29 SCAN/SKIP MODE Selects which computers will be accessed under Skip mode (see F5: SKP , page 34), and Auto Scan mode (see F7: SCAN , page 36). Choices are: ALL – All the ports which have been set Accessible (see SET ACCESSIBLE PORTS , page 31); QUICK VIEW – Only those ports which have been set Accessible and have been[...]

KH2508 A / KH2516 A User Manual 30 SET QUICK VIEW PORTS This function lets users and the adm inistrator sele ct which ports to include as Quick View ports.  T o select/deselect a port as a Qu ick View Port, use the navigation keys to move the highlight bar to it, then press the [Sp acebar].  When a port has been selected as a Quick View Port,[...]

Chapter 4. OSD Operation 31 F4: ADM F4 is an administrator onl y function. Accessing this function allo ws the administrator to configure and contro l the overall operation of the OSD. To change a setting doubl e click it; or use the up and down arrow key s to move the highlight bar to it, then press [Enter] . After you select an item, a submenu wi[...]

KH2508 A / KH2516 A User Manual 32 SET OCCUPY TIMEOUT This function sets a time threshol d for users on ports whose Operation Mode has been set to Occupy (see SET OPERATION MODE , page 31). If there is no activity from the user occupying the port for the amount of time set here, the user is timed out an d keyboard and mouse control on the port is r[...]

Chapter 4. OSD Operation 33 SET CA T 5 LENG TH Lets you specify how long the Cat 5e/6 cable between the port and the KVM adapter cable is. Press [Spacebar] to cycle through the cable length settings: S : Short – for up to 25 m M : Medium – for between 20 and 35 m L : Long – for above 35 m An S, M, or L appears next to the port to indicate the[...]

KH2508 A / KH2516 A User Manual 34 F5: SKP This function enables you to easily skip backward or forw ard, switching the console focus from the cu rrently active KVM Port to the previous or next available one.  The selection of computers to be av ailable for Skip m ode switching is made with the Scan/Skip mode settin g under the F3 SET functi on [...]

Chapter 4. OSD Operation 35 F6: BRC F6 is an administrator only function. When this function is in effect, commands sent from the console ar e broadcast to all ava ilable computers on the installation. This function is parti cularly useful for operations th at need to be performed on multiple computers, such as performing a system wid e shutdown, i[...]

KH2508 A / KH2516 A User Manual 36 F7: SCAN This function automatically switches am ong the available computers at regular intervals so that you can monito r their activity without having to tak e the trouble of switching manu ally.  The selection of computers to be included for Auto Scanning is made wit h the Scan/Skip mode setting u nder the F[...]

Chapter 4. OSD Operation 37 F8: LOUT Clicking the F8 field, or pressi ng [F8] , logs you out of the OSD and blanks the console screen. This is different from simply deactivating the OSD when you are at the Main Screen by pressing [Esc]. With this function you must log in all over again to regain access to the OSD, whereas with [Esc], all you have t[...]

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39 Chapter 5 Hotkey Operation Hotkey Port Control Hotkey port control allows you to provide KVM focus to a particular computer directly from the keyboard. The K H2508 A / KH2516 A provides t he following Hotkey port control features:  Selecting the Active Port  Auto Scan Mode Switchi ng  Skip Mode Switch ing  Computer Keyboard / Mouse R[...]

KH2508 A / KH2516 A User Manual 40 Invoking Hotkey Mode All Hotkey operations begi n by invoking Hotkey mode. 1 To invoke Hotkey mode you may use t wo possible keystroke sequences sho wn below. Only one of the two key-sequences below can be operational (see Setting the Hotkey key combination on page 46) : Number Lock and Minus Keys 1. Hold do wn th[...]

Chapter 5. Hotkey Operation 41 Selecting the Active Port Each computer port is assigned a port ID (see Port ID Numbering , page 21) . You can directly access any computer with a Hotkey co mbination that specifies the port ID that the computer is connected to. The steps are: 1. Invoke Hotkey mode: [Num Lock] + [-] or [Ctrl] + [F12] 2. Key in the por[...]

KH2508 A / KH2516 A User Manual 42 Auto Scan Mod e Switching Auto Scan automat ically sw itches among all the active computer ports that are accessible to the currently logged on user at regular intervals. This allows their activity to be mo nitored automati cally (See SKAN/S KIP MODE of the OSD F3 SET function, page 29). Setting the Scan Int erval[...]

Chapter 5. Hotkey Operation 43 (Continued from previous page.) When you want to keep the fo cus on a particular computer , Pausing is more convenient than exiting Auto Scan mode. When you resume scanning it starts at th e computer where you pa used. If you exited and then restarted Auto Scanning, it starts, at the beginning, from th e first compute[...]

KH2508 A / KH2516 A User Manual 44 Skip Mode Switching This feature allows you to switch between computers in o rder to monitor t hem manually. You can focus on a particular port for as long as you like – as opposed to auto-scanning, which automati cally switches the port focus after a fixed inte rval. Enterin g Skip Mode To enter Skip mode, key [...]

Chapter 5. Hotkey Operation 45 Computer Keyboard / Mouse Reset If either the keyboard or mouse stop functioning on the computer connected to the currently selected port, you can pe rform a keyboard / m ouse reset on the computer by executing the following steps: 1. Invoke Hotkey mode: [Num Lock] + [-] or [Ctrl] + [F12] 2. Press [F5] . After you pre[...]

KH2508 A / KH2516 A User Manual 46 Setting the Hotkey key combination The keys used to enter the Hotkey Mode (see HOTKEY COMMAND MODE , page 29) can be switched between: [Num Lock] + [-] , and [Ctrl] + [F12] by the following steps: 1. Invoke Hotkey mode: [Num Lock] + [-] or [Ctrl] + [F12] 2. Press [H] . After you press [H], the command line display[...]

Chapter 5. Hotkey Operation 47 Setting the Port Operating System A port’s operating system co nfiguration can be ma tched to that of the computer attached to the port by performing the following steps: 1. Invoke Hotkey mode: [Num Lock] + [-] or [Ctrl] + [F12] 2. Press a [Function] key , where [Function] refers to one of the function keys in the f[...]

KH2508 A / KH2516 A User Manual 48 Hotkey Summary T able [Num Lock] + [-] or [Ctrl] + [F12] [A] [Enter] Invokes Auto Scan mode. When Auto Scan mode is in effect, [P] or left-click p auses auto-scanning. When auto-scanning is paused, pressing any key or another left-click resumes auto- scanning. [B] T oggles the Beeper On or Off. [Esc] or [S pacebar[...]

49 Chapter 6 Keyboard Emulation Mac Keyboard The PC compatible (101/104 key) keyboard can emu late the functions of the Mac keyboard. The emulation mappings are listed in the table below. Note: When using key combinations, press and release the first key (Ctrl), then press and release the activation key . PC Keyboard Mac Keyboard [S hift ] Sh ift [[...]

KH2508 A / KH2516 A User Manual 50 Sun Keyboard The PC compatible (101/104 key) keyboard can emul ate the functions of the Sun keyboard when t he Control key [Ctrl] is used in conjunction with other keys. The corresponding function s are shown in the table below. Note: When using key combinations, press and release the first key (Ctrl), then press [...]

51 Chapter 7 The Firmware Upgrade Utility Introduction The purpose of the Windows-ba sed Firmware Upgrade Uti lity is to provide an automated process for upgrading the KH2508 A / K H2516 A and compatible adapter cable firmware. The program co mes as part of a Firmware Upgrade Package that is speci fic for each device. The latest revisions of ne w f[...]

KH2508 A / KH2516 A User Manual 52 (Continued from previous page.) 3. Use the firmware upgrade cable (provided with this unit), to connect a COM port on your computer to the firmware upgrade port of your device. Note: On a daisy chained installation , conn ect the cable to the first station (master) unit. The chained stations (slaves) will receive [...]

Chapter 7. The Firmware Upgrade Utility 53 Performing the Upgrade St arting the Upgrade To upgrade your firmware: 1. Run the downloaded Firmware Upgr ade Package file, either by double clicking the file ico n, or by opening a command line and keying i n the full path to it. The Firmware Upgrade Utility W elcome screen appears: 2. Read and Agr ee to[...]

KH2508 A / KH2516 A User Manual 54 The Utility checks to ma ke sure the KH2508 A / KH2516 A is in the Firmware Upgrade Mo de and then lists all firmware available preselected in the Device List panel. Note: If the Utility fails to list any firmware check that the KH 2508 A / KH2516 A is connected and in th e Firmware Upgrade Mode. Alternatively the[...]

Chapter 7. The Firmware Upgrade Utility 55  As the upgrade proceeds status messages appear in the S tatus Messages panel, and the progress toward completion is shown on th e Pr ogr ess bar .  T o abort the upgrade procedure before it completes, cl ick Cancel . If you cancel before completion, a dialog box warns you that the upgrade will not f[...]

KH2508 A / KH2516 A User Manual 56 Upgrade Failed If the upgrade failed to complete successfully a dialog box appears asking if you want to retry. Click Yes to retry. If you click No , the Upgrade Failed screen appears similar to below: Click Cancel to close the Firmware Upgrade Utility. See the next section, Firmware Upgrade Recovery , for how to [...]

Chapter 7. The Firmware Upgrade Utility 57 3. From your KVM switch console, bring up the OSD (see page 23) and select the F4ADM function. 4. Scroll down to FIRMWARE UPGRADE . Press [Enter] . 5. Press [Y] to invoke Upgrade mod e. 6. Proceed with the firmware upgrade a s described in Performing the Upgrade , starting on page 53. 7. When the upgrade e[...]

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59 Appendix Safety Instructions General  Read all of these instructions. Save them for future reference.  Follow all warnings and instructions marked on the dev ice.  Do not place the device on any unstable su rf ace (cart, stand, table, etc.). If the device falls, serious damage wi ll result.  Do not use the device near water .  Do [...]

KH2508 A / KH2516 A User Manual 60 (Continued from previous page.)  Do not allow anything to rest on th e power cord or cables. Route the power cord and cables so that they cannot be stepped on or tripped over .  If an extension cord is used with this device make sure that the total of the ampere ratings of all products us ed on this cord doe[...]

Appendix 61 Rack Mounting  Before working on the rack, ma ke sure that the stabilizer s are secured to the rack, extended to the floor , and that the full w eight of the rack rests on the floor . Install front and side stabilizers on a single rack or front stabilizers for joined multiple ra cks before work ing on the rack.  Always load the ra[...]

KH2508 A / KH2516 A User Manual 62 T echnical Support International  For online technical support – including troubleshooting, docume ntation, and software updates: http://support.aten.com  For telephone support, see Telephone Suppo rt , page iii: North America When you contact u s, please have the followin g information ready beforehand: ?[...]

Appendix 63 Specifications Function KH2508 A K H2516 A Computer Connecti ons Direct 8 16 Max. 256 (via Daisy Chain) 512 (via Dais y Chain) Port Selection OSD (On Screen Display); Hotkeys Pushbutt ons Connectors Console KB 2 x 6-pin Mini-DIN F (Purple) 2 x USB T ype A F Video 2 x HDB-15 F Mouse 2 x 6-pin Mi ni-DIN F (Gree n) 2 x USB T ype A F KVM Po[...]

KH2508 A / KH2516 A User Manual 64 Environmen t Opera ting T e mp. 0–50 o C S torage T e mp. -20–60 o C Humidity 0–80% RH Physical Properties Housing Metal Weight 2.81 kg 2.85 kg Dimensions 43.72 x 1 6.36 x 4.40 cm Function KH2508 A KH2516 A[...]

Appendix 65 Connection T ables The following tabl e indicates the relationshi p between the number of KH2508 A / KH2516 A units and the number of computers that they control KH2508 A KH2516 A No. Computers No. Com puters No. Computers No. Computers 1 1 - 8 9 65 - 72 17 129 - 136 25 193 - 200 2 9 - 16 10 73 - 80 18 137 - 144 26 201- 208 3 17 - 24 1 [...]

KH2508 A / KH2516 A User Manual 66 OSD Factory Default Settings The factory default se ttings are as follows: Setting Default OSD Hotkey [Scroll Lock] [Scroll Lock] Port ID Display Position Upper Left Corner Port ID Display Duration 3 Seconds Port ID Display Mode The Port Number plus the Port Name Scan Duration 5 Seconds Scan/Skip Mode All Screen B[...]

Appendix 67 Administrator Login Failure If you are unable to perform an Admini strator login (because the Username and Password information has become corrupted or you have forgotten it , for example) you can clear the login info rmation with the followi ng procedure: 1. Power off the KH2508 A / KH2516 A and remove its housing. 2. Short the jumper [...]

KH2508 A / KH2516 A User Manual 68 T roubleshooting Overview Operation problems can be du e to a variety of causes. The first step in solving them is to make sure that all cables are securely attached and seated completely in their sockets. In addition, updating the product’s fi rmware may solve problem s that have been discovered and resolved si[...]

Appendix 69 Limited W arranty ALTUSEN warrants this product against defects in material or workmanshi p for a period of one (1) year from the date of purch ase. If this produ ct proves to be defective, contact ALTUSEN's support department for repair or replacement of your unit. ALTUSEN will not issue a refund. Return requests can not be proces[...]

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71 Index A Adapter Cable Installation, 16 Adapter Cables, 11 Administrator Login Failure, 67 Auto Scanning, 28, 42 Invoking Auto Scan, 42 Pausing Auto Scan, 42 Setting the Scan Interval, 42 Stopping, 43 B Benefits, 2 C Components Front View, 6 Rear View, 8 Connection Tables, 63 D Daisy chaining, 17 F Factory Default Settings, 66 Features, 2 Firmwar[...]

KH2508 A / KH2516 A User Manual 72 O Online Registration, iii OSD Factory Default Settings, 66 Functions, 2 6 Hotkey, 23 Main Screen Headings, 25 Navigation, 2 5 Overview, 23 Password, 23 P Password, 23 Port LEDs, 7 Selection, 19 Port ID Numbering, 21 Powering Off and Restarting, 21 R Rack Mounting, 13 Rear View, 8 Requirements Computer, 4 Console,[...]