NOVEMBER 1998 16 15 CT SELE 11 CT SELE 7 CT SELE 14 WER CT PO SELE 10 WER CT PO SELE 6 WER CT PO SELE WER CT PO SELE WER CT PO SELE 13 R R WER CT PO SELE POWER 12 9 CT SELE 5 CT SELE CT SELE POWER 2 1 CT SELE FF ON/O CT SELE POWER POWER POWER 8 POWER + - 4 3 POWER POWER WER CT PO SELE CT SELE POWER 16 POWER 15 14 R R 13 CT SELE WER CT PO SELE POWER CT SELE WER CT PO SELE 6 5 CT SELE WER CT PO SELE 2 1 ON/O FF CT SELE WER CT PO SELE POWER POWER CT SELE P
THE SERVSWITCH™ FAMILY Welcome to the ServSwitchTM Family! Thank you for purchasing a BLACK BOX® ServSwitch™ Brand KVM switch! We appreciate your business, and we think you’ll appreciate the many ways that your new ServSwitch keyboard/video/mouse switch will save you money, time, and effort. That’s because our ServSwitch family is all about breaking away from the traditional, expensive model of computer management.
SERVSWITCH™ AND SERVSWITCH ULTRA™ TRADEMARKS USED IN THIS MANUAL BLACK BOX and the logo are registered trademarks, ServSwitch, ServSwitch Ultra, Matrix ServSwitch, and ServManager are trademarks, and “The World’s Source for Connectivity” is a service mark, of Black Box Corporation. Apple, Mac, and Macintosh are registered trademarks, and Apple Desktop Bus and ADB are trademarks, of Apple Computer, Inc. ProComm is a registered trademark of DATASTORM TECHNOLOGIES, INC.
FCC/IC STATEMENTS FEDERAL COMMUNICATIONS COMMISSION AND CANADIAN DEPARTMENT OF COMMUNICATIONS RADIO FREQUENCY INTERFERENCE STATEMENTS This equipment generates, uses, and can radiate radio frequency energy and if not installed and used properly, that is, in strict accordance with the manufacturer’s instructions, may cause interference to radio communication.
SERVSWITCH™ AND SERVSWITCH ULTRA™ NORMAS OFICIALES MEXICANAS (NOM) ELECTRICAL SAFETY STATEMENT INSTRUCCIONES DE SEGURIDAD 1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de que el aparato eléctrico sea operado. 2. Las instrucciones de seguridad y operación deberán ser guardadas para referencia futura. 3. Todas las advertencias en el aparato eléctrico y en sus instrucciones de operación deben ser respetadas. 4. Todas las instrucciones de operación y uso deben ser seguidas. 5.
NOM STATEMENT 12. Precaución debe ser tomada de tal manera que la tierra fisica y la polarización del equipo no sea eliminada. 13. Los cables de la fuente de poder deben ser guiados de tal manera que no sean pisados ni pellizcados por objetos colocados sobre o contra ellos, poniendo particular atención a los contactos y receptáculos donde salen del aparato. 14. El equipo eléctrico debe ser limpiado únicamente de acuerdo a las recomendaciones del fabricante. 15.
SERVSWITCH™ AND SERVSWITCH ULTRA™ Contents Chapter Page 1. Specifications ........................................................................................... 10 2. Introduction ............................................................................................. 2.1 The Complete Package ..................................................................... 2.2 Operating Features ........................................................................... 2.3 The Front Panel ..............
TABLE OF CONTENTS Chapter 4. 5. Page Operation: Hardware and Commands (continued) 4.3 The Commands in Detail (continued) 4.3.7 Set Keyboard/Mouse (IBM and Multiplatform Regular ServSwitches Only) ........................................... 4.3.7.A Keyboard Types (IBM Type Keyboard Only) ........ 4.3.7.B Mouse Types (IBM Type Mouse Only) .................. 4.3.7.C Keyboard Modes ...................................................... 4.3.7.D Mouse Interfaces ................................................
SERVSWITCH™ AND SERVSWITCH ULTRA™ Contents (continued) Chapter 5. 6. 8 Page Operation: On-Screen Display (continued) 5.2 The “Configure System” Page (continued) 5.2.4 Configure System: Expansion Units (IBM and Multiplatform Models Only) ........................................... 5.2.5 Configure System: Expansion Width (IBM and Multiplatform Models Only) ........................................... 5.2.6 Configure System: Scan Mode .............................................. 5.2.
TABLE OF CONTENTS Chapter 6. Page Troubleshooting (continued) 6.2 Common Problems (continued) 6.2.6 Mouse Driver Doesn’t Load ................................................. 6.2.7 Can’t Access Mouse Functions ............................................. 6.2.8 PS/2 Mouse Gets Out of Sync .............................................. 6.2.9 Mouse Doesn’t Move Pointer/Cursor ................................. 6.2.10 Display is Fuzzy ...................................................................... 6.
SERVSWITCH™ AND SERVSWITCH ULTRA™ 1. Specifications Hardware Required — Monitor that supports your computers’ highest video standard; in multiplatform applications, should be a multisync model capable of forming video from either composite sync or separate horizontal and vertical sync signals (see Section 4.1.
CHAPTER 1: Specifications Interfaces (continued)— CPU and MONITOR/KEYBOARD/MOUSE ports (continued): Multiplatform (KV30xx, KV50xx) models: Proprietary composite of: • IBM AT, IBM PS/2, Sun, or ADB keyboard; • RS-232, PS/2, Sun, or ADB mouse; and • Video (standards listed above) Resolution — With original Serv cabling: Up to 1024 x 768 noninterlaced; With coaxial cabling: Up to 1280 x 1024 noninterlaced; Refer to Section 4.1.
SERVSWITCH™ AND SERVSWITCH ULTRA™ Indicators — SW721 and KVxx02 models: (5) Front-mounted LEDs: (1) [Unit] POWER, (2) SELECT, (2) [CPU] POWER; SW722 and KVxx04 models: (9) Front-mounted LEDs: (1) [Unit] POWER, (4) SELECT, (4) [CPU] POWER; SW723 and KVxx08 models: (9) Front-mounted LEDs: (1) [Unit] POWER, (8) SELECT, (8) [CPU] POWER; SW724 and KVxx12 models: (25) Front-mounted LEDs: (1) [Unit] POWER, (12) SELECT, (12) [CPU] POWER; SW725 and KVxx16 models: (33) Front-mounted LEDs: (1) [Unit] POWER, (16) SELE
CHAPTER 1: Specifications Power (continued)— For 230-VAC, 50-Hz operation (continued): Slimline and full-size (SW723AE, SW724AE, SW725AE, KV3104FAE, KV510xFAE, KVxx08SAE, KVxx12FAE, and KVxx16FAE) models: From wallmount power supply PS018E: Optimal input: 230 VAC, 50 Hz, 60 mA; Output: 16.5 VAC CT, 1.45 amps; Consumption: Up to 23.9 VA (11.9 watts); Maximum Altitude— 10,000 ft.
SERVSWITCH™ AND SERVSWITCH ULTRA™ 2. Introduction Thank you for choosing a ServSwitch™ or ServSwitch Ultra™. Designed with your needs in mind, your new Switch will simplify your job by helping you organize your multiple-computer application.
CHAPTER 2: Introduction • The units have flash memory, so you can upgrade their firmware through their RS-232 ports. • Rackmount kits are also available. • Full-size 4-, 8-, and 12-port units can be expanded up to 16 ports by installing a 4-Port Expansion Board (see Appendix F). Features exclusive to the PC and multiplatform models: • You can access up to 256 CPUs with one keyboard, monitor, and mouse. (This would require the maximum cascaded system of seventeen 16-port Serv units.
SERVSWITCH™ AND SERVSWITCH ULTRA™ 2.3 The Front Panel The front panels of the ServSwitch feature three pushbutton switches and several LED indicators. To familiarize yourself with these controls and indicators, refer to Figures 2-1, 2-2, and 2-3 below and the descriptions that follow on the next page. Figure 2-1. The front panel of a KV5x04M model (mini) 4 to 1 ServSwitch Ultra. Figure 2-2. The front panel of a KV5x08S model (slimline) 8 to 1 ServSwitch Ultra. Figure 2-3.
CHAPTER 2: Introduction Panel Label Description POWER Main Power LED: Lights to indicate that unit is powered ON. ON/OFF Power Button: Pressing this button turns the unit ON and OFF when the power supply is plugged into the unit and into a working outlet. CPU STATUS CPU Status LEDs: Numbered pairs of LEDs indicate the status of the CPU or submaster (cascaded) Serv device connected to the corresponding port on the rear panel: SELECT (red) Lights if the corresponding port is the currently selected port.
SERVSWITCH™ AND SERVSWITCH ULTRA™ 2.4 The Rear Panel All cable connections are made at the rear panel of the ServSwitch, as illustrated in Figure 2-4 and described below. Figure 2-4. The rear panel of a 16 to 1 ServSwitch (KV3x16F). Panel Label Connector Description CPU N DB25 F Connect the sharing computers to these ports with “CPU Adapter Cables.
CHAPTER 2: Introduction Panel Label Connector Description CPU N DB25 F For each submaster you plan to connect, you must have an Expansion Cable; you must have an Adapter Cable for each CPU you plan to connect. See Section 2.5. (continued) NOTE The mini-model chassis has 4 CPU N connector slots. The full-size chassis has 16 of these slots.
SERVSWITCH™ AND SERVSWITCH ULTRA™ 2.5 Cable Requirements Many switches of this type have what seems like ten million connectors on their rear panels: one for each CPU’s video cable, one for each keyboard cable, and a third for each mouse cable. The potential for tangling or mismatching cables is high. By contrast, you can connect the ServSwitch to your CPUs with one “CPU Adapter Cable” for each CPU. This single cable reaches the CPU’s video-output, keyboard, and mouse ports.
CHAPTER 3: Installation 3. Installation 3.1 Quick Setup Guide Figure 3-1, below, shows a basic example of connecting a CPU, a submaster, a keyboard, a monitor, and a mouse to the ServSwitch unit. IBM PC equipment is shown, but the basic principles will be similar for all equipment types. Connectors will vary depending on the types of equipment you are installing. Figure 3-1. Basic system setup for a slimline 8-port unit.
SERVSWITCH™ AND SERVSWITCH ULTRA™ 3.2 Installation Procedure This section provides complete instructions for the hardware setup of a single ServSwitch. (For detailed instructions on the capabilities and concerns involved in installing a cascaded Switch system, see Section 3.3; to make troubleshooting the installation easier, we recommend that you check the master and each submaster as it is installed, rather than installing all units, then checking the entire cascade.
CHAPTER 3: Installation 3.2.3 CONNECTING CPUS CPU Adapter Cables run from the ServSwitch to the keyboard port, mouse port, and video-output port of each CPU you want to directly attach to it. Different types of this cable fit the connectors on different computers (see Appendix B). This cable also comes in the different lengths supported by different applications (see Section 4.1.3).
SERVSWITCH™ AND SERVSWITCH ULTRA™ of this writing, it does not support docking stations; your Serv system might not function properly if any are attached. Even if you connect your ThinkPad directly (rather than through a docking station) to the keyboard, video, and mouse feeds from the ServSwitch, it still won’t work, because the ServSwitch currently supports only “stream mode” (continuous) mouse data but the ThinkPad has to see “prompt mode” (burst-on-request) mouse data. 3.2.
CHAPTER 3: Installation 3.2.6 SWITCHING FROM THE KEYBOARD Your ServSwitch is now ready for operation using its default settings. To take full advantage of the Switch’s features, refer to Chapter 4, which gives detailed information about each of the ServSwitch commands, describing each command’s function and keystroke sequence. For your convenience, this info is summarized in Section 4.2.
SERVSWITCH™ AND SERVSWITCH ULTRA™ You can add submasters to your ServSwitch system as you need them. For each submaster you add to the system, you add as many ports as are on that submaster, minus the one port on each master “above” it that’s now occupied. Refer to Figure 3-2 on the next page: • Connecting one 4-port submaster Serv unit to a 4-port master ServSwitch (top view) gives you a total of 7 ports: 4 on the submaster and another 3 (4 minus the one that the submaster is attached to) on the master.
CHAPTER 3: Installation MASTER UNIT CPU 7 CPU 6 CPU 5 CPU 4 CPU 3 CPU 2 CPU 1 4 3 2 1 4 3 2 1 CPU3 CPU4 CPU1 CPU2 MONITOR/KEYBOARD/MOUSE RS-232 4 3 2 1 CPU3 CPU4 CPU1 CPU2 MONITOR/KEYBOARD/MOUSE RS-232 CPU4 CPU1 CPU2 MONITOR/KEYBOARD/MOUSE RS-232 POWER 17VAC CT POWER 17VAC CT Max.
SERVSWITCH™ AND SERVSWITCH ULTRA™ • If you use coaxial cables, the maximum recommended distance from the ServSwitch to the attached monitor, keyboard, and mouse is 20 ft. (6.1 m) with typical monitors and video resolutions, but see the first Caution notice on page 23. For typical CPUs, this is also the maximum recommended distance from any submaster to any attached CPU. Depending on your application, this distance might vary; see Section 4.1.3.
CHAPTER 3: Installation • You must not cascade submasters to more than one “layer.” That is, you may connect submasters to the CPU ports of one or (with Matrix ServSwitch submasters) two master ServSwitches, but do not connect any submasters to submasters’ CPU ports. To illustrate this restriction, let’s say you’ve installed a four-port submaster on a four-port ServSwitch master and you have a four-port submaster yet to install.
SERVSWITCH™ AND SERVSWITCH ULTRA™ 4. Attach the power supplies to the master(s) and to the submasters. Plug in the power supplies, but do not turn the master(s) or submasters ON. 5. Turn ON all of the submaster units, then the master unit(s). 6. Turn ON the computer identified as CPU 1. Wait until the boot process is complete, then turn ON CPU 2, wait until it boots, turn ON CPU 3, etc., until all of your computers are powered up.
CHAPTER 4: Operation: Hardware and Keyboard Commands 4. Operation: Hardware and Keyboard Commands The first part of this chapter, Section 4.1, gives you some guidelines that you should follow to make sure your ServSwitch works properly with your equipment. Section 4.2 summarizes the ServSwitch’s keyboard commands, and Section 4.3 describes these commands in detail. Section 4.
SERVSWITCH™ AND SERVSWITCH ULTRA™ 4.1.2 MOUSE AND KEYBOARD When you power up your ServSwitch system, make sure that your CPUs, mouse (mice), and keyboard(s) are properly cabled to the Switch (or to the appropriate master or submaster unit). When you boot up your CPUs, the master(s) and/or submasters to which they are connected should already be ON.
CHAPTER 4: Operation: Hardware and Keyboard Commands • If you are using a PC mouse as the common mouse, make sure that the IBM PC CPUs use only the generic Microsoft mouse driver MOUSE.COM, version 4.0 at least and preferably version 9.01 or higher. If you’re running Windows® 3.x, this driver must be loaded in Windows as well as in the base operating system.
SERVSWITCH™ AND SERVSWITCH ULTRA™ Table 4-1. Keyboard Mapping by the Multiplatform ServSwitches Generally, the ServSwitch interprets keys by their positions on the keyboard, so any keys that occupy more or less the same positions and perform more or less the same functions across platforms will map one-to-one.
CHAPTER 4: Operation: Hardware and Keyboard Commands 4.1.3 MONITOR NOTE At resolutions up to 800 x 600, the video quality for most ServSwitch applications will be excellent. At higher resolutions, however, you might see a little fuzziness on your monitor no matter how close to ideal your ServSwitch system is. If all of your CPUs are of the same type, we recommend that you use the corresponding type of monitor.
SERVSWITCH™ AND SERVSWITCH ULTRA™ The IBM and multiplatform ServSwitches will support SVGA (Super VGA) video, but with original Serv cables the video quality will decrease markedly at higher resolutions and distances. Table 4-2, below, illustrates this. The distances in the table are total cable lengths measured from the CPU to the monitor.
CHAPTER 4: Operation: Hardware and Keyboard Commands By contrast, coaxial cables (standard for Sun applications, required for XGA applications, and recommended for most other applications) do much better at maintaining video quality, as shown in Table 4-3 below. (For the meaning of quality numbers 3, 2, and 1, see the bottom of page 36.) As before, the distances in the table are total cable lengths measured from the CPU to the monitor.
SERVSWITCH™ AND SERVSWITCH ULTRA™ 4.2 Keyboard-Command Summary Table 4-4 below and on the next two pages summarizes the commands that can be sent to the ServSwitch. To enter any command at the shared keyboard, first press and release the left Control Key, represented by “[CTRL].” (This cues the Switch to look for commands from that keyboard.) Then enter the command followed by any arguments you wish to specify (the port number, for example).
CHAPTER 4: Operation: Hardware and Keyboard Commands Command Keystroke Sequence Description Scan OFF [CTRL] X Turns Scan mode OFF (the port being scanned at the time the command is entered is given access to the shared monitor, keyboard, and mouse). Note: Scan can also be stopped by entering a Select Port command.
SERVSWITCH™ AND SERVSWITCH ULTRA™ Table 4-4. The ServSwitch’s Keyboard Commands (continued) Command Keystroke Sequence Description Set Keyboard Typematic [CTRL] Axxx [ENTER] (xxx = a decimal value from 0 to 127) IBM/multiplatform only: Sets the keyboard typematic (automatic key-repeat) function of the currently selected CPU. This command works only with IBM PC type CPUs that have standard keyboards and CMOS that allows users to program the typematic function.
CHAPTER 4: Operation: Hardware and Keyboard Commands 4.3 The Commands in Detail 4.3.1 SELECTING A PORT FROM THE SHARED KEYBOARD To select a port from your keyboard, press and release your keyboard’s left Control key ([CTRL]), then type in the port number: If “Maximum Ports” is set to 1 to 9: The ServSwitch will immediately switch to the desired port when you press the one-digit number’s numeral key.
SERVSWITCH™ AND SERVSWITCH ULTRA™ 4.3.3 SCAN MODE To start scanning (switching from CPU to CPU in a continuous rotation) from the keyboard, press and release the left Control key ([CTRL]), then press [S]. The ServSwitch will begin scanning sequentially from its currently selected port through the higher-numbered ports, then begin again at CPU Port 1. As it scans, it delays 1 to 15 seconds at each port. (This “Scan-Delay Time” is user-selectable; see Section 4.3.5.
CHAPTER 4: Operation: Hardware and Keyboard Commands 4.3.6 SET SCREEN-SAVER INTERVAL This feature reduces the wear on your shared screen and provides security for your system by blanking the screen when there has been no keyboard activity for a specified length of time. To set the screen-saver interval, press and release the left Control key, type [V] followed by the interval time in seconds (1 to 999, or 0 to disable the screen saver), and press [ENTER].
SERVSWITCH™ AND SERVSWITCH ULTRA™ 4.3.7.A Keyboard Types (IBM Type Keyboard Only) At the time of this writing, there are two basic types of keyboards most commonly used with IBM PS/2 and PC/AT compatible computers. The older type, standard for several years, has either 101 or 102 keys depending on which country and language it was designed for.
CHAPTER 4: Operation: Hardware and Keyboard Commands change from a PC Mouse to a Microsoft serial mouse. (If you send the ServSwitch a Set Keyboard/Mouse command that attempts to change the shared-mouse type, but the shared mouse is Sun or Apple type or the Switch can autosense that the mouse is otherwise not of the type you’ve indicated, the Switch will ignore the command.) 4.3.7.
SERVSWITCH™ AND SERVSWITCH ULTRA™ 4.3.7.D Mouse Interfaces IBM compatible CPUs can have several types of mouse interfaces. The ServSwitch supports three of these: PS/2 (including PS/2 wheel), Microsoft serial, and PC Mouse (Mouse Systems); see Section 4.3.7.B. PS/2 is the factory-default mouseinterface setting for all of the CPU ports of PC-only and multiplatform ServSwitches.
CHAPTER 4: Operation: Hardware and Keyboard Commands 4.3.7.E Command Procedure On the input side of the ServSwitch, you might need to issue this command twice— once to set the keyboard type and once to set the mouse type. You can enter these global input-side commands at any time.
SERVSWITCH™ AND SERVSWITCH ULTRA™ KEYBOARD/MOUSE port (this will require an MKM Adapter Cable), and select the port as if the submaster were a single unit. Then issue the Set Keyboard Mode and Keep Settings commands as described in the previous paragraphs. Unplug the keyboard and reconnect the submaster to the master Serv unit. The port’s keyboard mode should now be properly configured.
CHAPTER 4: Operation: Hardware and Keyboard Commands 4.3.8 SET MAXIMUM PORTS Use this command to tell a ServSwitch the total number of ports in its system (on that Switch and all attached submasters) to which devices are or will be connected. This allows the scan function to cycle correctly with CPUs connected to more or fewer ports than the factory default for this option, which (except for the 2-port models) is the total number of ports on the ServSwitch (“4” for a 4-port unit, “8” for an 8-port, etc.).
SERVSWITCH™ AND SERVSWITCH ULTRA™ 4.3.9 SET WIDTH OF SUBMASTERS (IBM AND MULTIPLATFORM MODELS ONLY) Use this command to tell an IBM only or multiplatform ServSwitch master how “wide” your submasters are (that is, how many ports each of them has). If your submasters are all 4-port models, set the Width to 4; if they are all 8-port models, set the Width to 8; and so on.
CHAPTER 4: Operation: Hardware and Keyboard Commands ❶ CPUs 1 3 2 5 4 6 7 8 2-Port Matrix ServSwitches Multiplatform ServSwitch Multiplatform ServSwitch 9 Sun CPU 9 Mac CPU WIDTH = 2 ❷ CPUs 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 & 16: Empty Slots 4-Port Matrix ServSwitches Multiplatform ServSwitch 17 Sun CPU Multiplatform ServSwitch 17 Mac CPU WIDTH = 4 Figure 4-1. Alternative configurations which the ServSwitch needs Width to resolve.
SERVSWITCH™ AND SERVSWITCH ULTRA™ 4.3.10 SET UNITS (IBM AND MULTIPLATFORM MODELS ONLY) Use this command to tell an IBM only or multiplatform ServSwitch master how many submasters (as opposed to CPUs) are directly attached to it. It doesn’t matter what kind of Serv device the submaster is.
CHAPTER 4: Operation: Hardware and Keyboard Commands ❶ ❷ CPUs 1 2 CPUs 1 4 3 2 3 CPUs 4 5 6 7 Submaster ServManager Submaster ServSwitches CPUs 5 6 7 Master ServSwitch Master ServSwitch UNITS = 1 UNITS = 2 Figure 4-2. Alternative configurations which the ServSwitch needs Units to resolve.
SERVSWITCH™ AND SERVSWITCH ULTRA™ 4.3.11 SET KEYBOARD TYPEMATIC (IBM AND MULTIPLATFORM MODEL SERVSWITCHES AND IBM COMPATIBLE KEYBOARDS ONLY) Most IBM type keyboards have an internal seven-bit “typematic” setting which governs the way the keyboard responds when you hold a key down to force it to repeat.
CHAPTER 4: Operation: Hardware and Keyboard Commands Table 4-7.
SERVSWITCH™ AND SERVSWITCH ULTRA™ 4.3.12 TRANSPOSE COMMAND AND ALT KEYS This command is designed to make life easier for people used to the Sun or Mac keyboard who now need to use a Windows 95/Windows 98 style (104/105-key) PC type shared keyboard, or vice versa.
CHAPTER 4: Operation: Hardware and Keyboard Commands 4.3.14 SEND NULL BYTE (PS/2 TYPE MICE ONLY) PS/2 type mice send control data to CPUs in three-byte increments. Sometimes, because of electronic transients, unusual power-up effects, or plugging and unplugging of cables from live equipment, the currently selected CPU in a ServSwitch system can lose one or two bytes of this control information and get “out of sync” with the shared mouse.
SERVSWITCH™ AND SERVSWITCH ULTRA™ 4.3.16 SEND [STOP] The Sun keyboard has too many keys for them all to be mapped one-to-one to keys on a PC or Mac keyboard, so there are a few Sun keys that PC and Mac keyboards can’t directly reproduce. (See Section 4.1.2 and Table 4-1 on page 34.) If you absolutely have to use a PC or Mac shared keyboard, you can use this command to cause the ServSwitch to send the currently selected CPU the scan code for the Sun [Stop] key.
CHAPTER 4: Operation: Hardware and Keyboard Commands 4.3.19 ACTIVATE SELECT WINDOW (SERVSWITCH ULTRA AND SERVSWITCH WITH OVERLAY BOARD ONLY) You can use this command to cause the ServSwitch Ultra to display its “computer select window” (see Section 5.5). To issue the Activate Select Window command, press and release the left Control key, then press and release the [ESC] (escape) key.
SERVSWITCH™ AND SERVSWITCH ULTRA™ 4.4 Using the RS-232 Port 4.4.1 CONNECTING EQUIPMENT TO THE PORT For your convenience, a computer or terminal with a TIA RS-232 serial port can be connected to the RS-232 serial port (RJ-12 connector) on the ServSwitch’s rear panel (see Appendix C for a pinout of this connector). This allows you to send switching commands from a non-local keyboard rather than from the shared keyboard, and is also necessary in order to download future firmware upgrades into the Switch.
CHAPTER 4: Operation: Hardware and Keyboard Commands 4.4.2 SWITCHING PORTS REMOTELY (OPTIONAL) To switch ports on a ServSwitch from a remote computer or terminal attached to the Switch’s RS-232 port, take these steps: 1. Set your computer for serial communication at 9600 bps, no parity, 8 data bits, and 1 stop bit. 2. To switch the ServSwitch to a different port, use a terminal-emulation program to type or send the desired port number followed by [ENTER] (a return).
SERVSWITCH™ AND SERVSWITCH ULTRA™ 3. Make sure the ServSwitch is turned OFF, then turn it ON while holding in both the “+” and “–” buttons on the Switch’s front panel. Once the Switch has powered up, release the “+” and “–” buttons, then the power button.
CHAPTER 4: Operation: Hardware and Keyboard Commands 5. If the file transfer is successful, press the space bar on the PC’s keyboard. LED 2 will go dark briefly while the ServSwitch begins reprogramming its flash memory with the new firmware. It should send the message: Programming flash This will be followed by another series of ASCII periods that shows the progress of the flash-reprogramming procedure.
SERVSWITCH™ AND SERVSWITCH ULTRA™ 4.4.3.B Upgrading the Firmware with the DOS COPY Command Alternatively, you can, if you choose, upgrade a unit’s firmware with the DOS COPY command. Use caution: The ServSwitch will attempt to send text messages back to you during this process, but DOS has no way of properly receiving and displaying them; what’s more, this “unexpected” serial data could cause your computer to crash. If you want to use this method anyway, take these steps: 1.
CHAPTER 4: Operation: Hardware and Keyboard Commands If, however, an error occurs, LED 2 will remain dark, and there is a chance that the computer will lock up (you might have to reboot). If the computer is OK, you’ll have to go back to step 3. If the second attempt doesn’t work, call Black Box for technical support. 5. If the copy process works, press and release the “+” button again. LED 2 will go dark briefly while the ServSwitch programs and verifies its flash memory.
SERVSWITCH™ AND SERVSWITCH ULTRA™ 5. Operation: On-Screen Display (ServSwitch Ultra and ServSwitch with Overlay Board Installed Only) 5.1 Overview You can use the ServSwitch Ultra’s on-screen display to: 1. Configure the ServSwitch Ultra through a series of configuration menus (triggered with the [CTRL] [F12] command, where [CTRL] is the left Control key). 2.
CHAPTER 5: Operation: On-Screen Display This menu and all other on-screen display windows appear “on top of” your computer video, assuming you are switched to a computer with active video. (If no video is present, then the background is black.) If the display is not synchronized, then you should switch to a computer with active video and configure the resolution setting from the “Configure overlay” page. 5.1.2 NAVIGATING THE CONFIGURATION PAGES Using the on-screen display is very easy and intuitive.
SERVSWITCH™ AND SERVSWITCH ULTRA™ 5.2 The “Configure System” Page Use this page, shown in Figure 5-2 below, to view and change keyboard-type, mouse, expansion, scan, and keyboard-typematic settings. Access it from the main menu by hitting [Enter] when “Configure system” is highlighted.
CHAPTER 5: Operation: On-Screen Display be displayed here as “US,” “US/UNIX,” “French,” “Danish,” “German,” “Italian,” “Netherlands/Dutch,” “Norwegian,” “Portuguese,” “Spanish,” “Swedish/Finnish,” “Swiss-French,” “Swiss-German,” “United Kingdom,” “Korean,” “Taiwan,” “Japan,” “French-Canadian,” or “unknown.” 5.2.2 CONFIGURE SYSTEM: MOUSE (IBM AND MULTIPLATFORM MODELS ONLY) For PC-only and multiplatform ServSwitch Ultra models, the factory-default setting for the mouse type is “PS/2.
SERVSWITCH™ AND SERVSWITCH ULTRA™ “PS/2 wheel” mice, such as the Microsoft IntelliMouse, are similar to regular mice, but have a clickable and scrollable wheel control instead of a middle button. “Serial 2-button mouse” refers to those mice that have serial RS-232 interfaces (usually with a DB9 connector), are Microsoft compatible, and use a 3-byte, 7-bit, 1200-bps, no-parity data format. Most PC serial mice with two buttons fall into this category.
CHAPTER 5: Operation: On-Screen Display 5.2.3 CONFIGURE SYSTEM: MAXIMUM COMPUTERS This setting corresponds to the number of computers (CPUs) connected to the ServSwitch Ultra system. It comes in handy when you are cascading, or are only using some of the CPU ports on a single Switch: When the Switch knows how many CPUs there are, it can handle switching and scanning more intelligently. To change this setting, press [Enter] while “Maximum computers” is highlighted.
SERVSWITCH™ AND SERVSWITCH ULTRA™ 5.2.4 CONFIGURE SYSTEM: EXPANSION UNITS (IBM AND MULTIPLATFORM MODELS ONLY) This setting corresponds to the number of “submaster” (expansion) Serv units that are connected to the main master IBM only or multiplatform ServSwitch Ultra. (This option will appear and can be set for Sun only and Mac only models, but has no purpose, because those models cannot currently be cascaded.) It helps to determine which CPU number is associated with which physical connector.
CHAPTER 5: Operation: On-Screen Display 5.2.6 CONFIGURE SYSTEM: SCAN TIME This item determines the time, in seconds, that the ServSwitch Ultra will pause at each of the computers when scanning. The default setting is 5 seconds. To change the scan time, press [Enter] while “Scan time” is highlighted. An “Input new value” box appears. Use the shared keyboard’s number keys to input a new value from 1 to 999 seconds and hit [Enter]. The input box disappears and the new setting appears in the “Scan time” field.
SERVSWITCH™ AND SERVSWITCH ULTRA™ Table 3-1. Typematic Rate Rate Value 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Actual Rate in Keystrokes per Second Rate Value Actual Rate in Keystrokes per Second 2 2.1 2.3 2.5 2.7 3 3.3 3.7 4 4.3 4.6 5 5.5 6 6.7 7.5 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 8 8.6 9.2 10 10.9 12 13.3 15 16 17.1 18.5 20 21.8 24 26.7 30 5.2.
CHAPTER 5: Operation: On-Screen Display 5.3 The “Configure Computers” Page Use this page to set the name, keyboard type, and mouse type for each CPU port. Access it from the main menu by hitting [Enter] when “Configure computers” is highlighted. The page is shown below in Figure 5-5. (The arrow in the column after the computer number points to the currently selected computer.
SERVSWITCH™ AND SERVSWITCH ULTRA™ 5.3.1 CONFIGURE COMPUTERS: COMPUTER NAME Each computer can be given a name consisting of up to 16 characters. These names appear as labels in the “Computer select” window (see Section 5.5). To change a computer name, press [Enter] while the corresponding “Computer name” field is highlighted. An “Input new name” box appears, as shown in Figure 5-6 below.
CHAPTER 5: Operation: On-Screen Display 5.3.2 CONFIGURE COMPUTERS: KEYBOARD (IBM AND MULTIPLATFORM MODELS ONLY) Use this field to tell the IBM PC compatible and multiplatform ServSwitch Ultra what type of keyboard mode (PC mode 1, 2, or 3) a given CPU uses. To change a CPU port’s keyboard mode, press [Enter] while the corresponding “Keyboard” field is highlighted. A keyboard-mode input box appears, as shown in Figure 5-7 below.
SERVSWITCH™ AND SERVSWITCH ULTRA™ setting will appear for the Apple only Switch, and only the “Sun” setting will appear for the Sun only Switch.) Once all of your CPU ports have been configured for the proper keyboard mode, make sure you save the changes. 5.3.3 CONFIGURE COMPUTERS: MOUSE (IBM AND MULTIPLATFORM MODELS ONLY) Use this field to tell PC-only and multiplatform models of the ServSwitch Ultra what type of mouse a given CPU uses.
CHAPTER 5: Operation: On-Screen Display 5.4 The “Configure Overlay” Page Use this page to set the color of the configuration menus, the resolution of ServSwitch-Ultra-generated video, the type and timing of the Switch-generated screen saver, the appearance of the “Computer select” window, and the appearance of the Switch-generated computer label (see Section 5.4.3.A). Access this page, shown in Figure 5-9 below, from the main menu by hitting [Enter] when “Configure overlay” is highlighted.
SERVSWITCH™ AND SERVSWITCH ULTRA™ 5.4.1.B Resolution This item gives you maximum monitor-type flexibility by determining the resolution and refresh rate of the video signal that the ServSwitch Ultra sends to the shared monitor while the unit isn’t receiving any video from the CPU. For PConly Switches, the possible choices—all IBM PC type, using 640 x 480 resolution— are “PC1” (60-Hz refresh rate), “PC2” (72 Hz), and “PC3” (75 Hz).
CHAPTER 5: Operation: On-Screen Display 5.4.2 CONFIGURE OVERLAY: COMPUTER SELECT WINDOW 5.4.2.A Background Color and Text Color These items determine the background and text colors of the “Computer select window” (see Section 5.5). The “solid” colors available are black, red, green, yellow, blue, magenta, cyan, and white; these are opaque and cause the window to hide part of the video coming from the CPUs.
SERVSWITCH™ AND SERVSWITCH ULTRA™ 5.4.3 CONFIGURE OVERLAY: COMPUTER LABEL 5.4.3.A Background Color and Text Color These items determine the background and text colors of the computer label. The ServSwitch Ultra displays this label on the shared monitor’s screen as you switch between CPUs to identify individual CPUs. The “solid” colors available are black, red, green, yellow, blue, magenta, cyan, and white; these are opaque and cause the label to hide part of the video coming from the CPUs.
CHAPTER 5: Operation: On-Screen Display 5.4.3.D Fade Out This item determines how long the ServSwitch Ultra continues to display the computer label after you switch to a different CPU before allowing it to “fade out.” If you set “Fade out” to anything from 1 to 254, the Serv unit will wait that number of seconds before fading out the computer label. If you set “Fade out” to 255, the unit will display the label at all times. If you set “Fade out” to 0, the unit will never display the computer label at all.
SERVSWITCH™ AND SERVSWITCH ULTRA™ 5.5 The “Computer Select Window” You can bring up a “computer select window” on the shared monitor’s screen to select a specific computer from a list of computers attached to the ServSwitch Ultra. Access the window, shown in Figure 5-10 below, by pressing and releasing the left [Ctrl] key and then hitting the [Esc] (escape) key. The arrow in the column after the computer number points to the currently selected computer.
CHAPTER 6: Troubleshooting 6. Troubleshooting The first two sections of this chapter discuss things to try when problems arise in a ServSwitch system. If the trouble you’re having with the Switch is something you haven’t seen before, or if the trouble seems minor, try the procedures detailed in Section 6.1 before doing anything else. The second section of this chapter suggests possible causes and solutions to frequently encountered problems; if the trouble is chronic, see Section 6.2. Sections 6.3 and 6.
SERVSWITCH™ AND SERVSWITCH ULTRA™ 6.2 Common Problems 6.2.1 A CPU CONNECTED TO YOUR SERVSWITCH OR A SUBMASTER DOESN’T BOOT, AND YOU GET A KEYBOARD OR MOUSE ERROR A. First make sure your ServSwitch and (if one is involved) your submaster are plugged in and powered up. B. If the Switch and submaster are ON, check the master’s configuration. The keyboard and mouse settings for that CPU might not be correct. C. If the configuration is OK, check your cables. Tighten any loose connections.
CHAPTER 6: Troubleshooting 6.2.2 YOU CAN’T SWITCH PORTS FROM THE KEYBOARD A. Can you do anything from the keyboard? If not, the keyboard strand of your MKM cable has probably come loose. Reconnect it. B. The ServSwitch might have lost power for less than three seconds. (This can cause the keyboard to lock up.) Disconnect the keyboard and plug it back in. C.
SERVSWITCH™ AND SERVSWITCH ULTRA™ 6.2.5 THE SERVSWITCH SCANS OR SWITCHES TO EMPTY OR NONEXISTENT PORTS A. The Maximum Ports setting is too high. (If any of the CPUs you can access are receiving garbage characters, this is a good indicator.) Set Maximum Ports to match the number of CPUs in your system. See Section 4.3.8. B. The Width and/or Units setting is wrong.
CHAPTER 6: Troubleshooting 6.2.9 YOUR MOUSE DOESN’T MOVE THE POINTER/CURSOR A. What type of mouse is it? If it is any IBM PC type other than those listed as being supported in item A under Section 6.2.6, chances are that the ServSwitch doesn’t support it. B. The mouse might not be configured properly. C. Your mouse must be connected to a powered ServSwitch when the CPUs are booted and when mouse applications are run.
SERVSWITCH™ AND SERVSWITCH ULTRA™ F. If the video problem is not centered on the monitor, check the video strands of your cables. Tighten any loose connections. G. If no cable connectors are loose, begin swapping your cables one at a time. If the problem goes away when you substitute a cable, the old cable is probably defective. H. If swapping cables doesn’t solve the problem, try plugging the CPU into a different CPU port on the ServSwitch or submaster.
CHAPTER 6: Troubleshooting 6.2.15 ONE OR MORE OF YOUR CPUS HAS PROBLEMS EXITING WINDOWS 3.X If a CPU running Windows 3.x locks up or (if it’s also running EMM386®) displays “EMM386 EXCEPTION ERROR #06” when you try to exit Windows, this is probably what causes it: Windows tries to unload its mouse drivers and reinstate any DOS drivers specified in AUTOEXEC.BAT and CONFIG.SYS. The ServSwitch sees this as a reboot and sends a [CTRL] [M] to the CPU to set the mouse driver for Microsoft mouse compatibility.
SERVSWITCH™ AND SERVSWITCH ULTRA™ 6.3 Calling Black Box If you determine that your ServSwitch is malfunctioning, do not attempt to alter or repair the unit. It contains no user-serviceable parts (and see the Caution notice on page 85). Contact Black Box Technical Support at 724-746-5500. Before you do, make a record of the history of the problem. We will be able to provide more efficient and accurate assistance if you have a complete description, including: • the nature and duration of the problem.
APPENDIX A: NVRAM Factory Defaults Appendix A: NVRAM Factory Defaults The table below and on the next page shows, for the ServSwitch’s saveable options, the default values stored in nonvolatile memory (NVRAM) when the ServSwitch is shipped from the factory. It also shows what commands or actions can change these settings for the ServSwitch’s current operating period, as well as what commands or actions can save changed settings to NVRAM, so that they become the new defaults.
SERVSWITCH™ AND SERVSWITCH ULTRA™ Option Factory-Default Setting To Change To Save Changes Keyboard Typematic 43 (delay of 1/2 second, rate of 10.9 characters per second) Type [CTRL] Axxx [ENTER] (xxx = 0 to 127; see Section 4.3.
APPENDIX B: Cable Product Codes Appendix B: Cable Product Codes The table below and on the next page lists the product codes for all the types of cables we currently offer for use with the ServSwitch. The four digits that follow the dash in each product code indicate how long each cable is in feet (one foot = 30.5 cm). For most of these cables, xxx’s are shown in place of the last three digits of the product code because the cables come in several stock lengths.
SERVSWITCH™ AND SERVSWITCH ULTRA™ Standard CPU Adapter Cables: Video Type (Connector on Cable) Keyboard Type (Connector on Cable) Mouse Type (Connector on Cable) Product Code VGA (HD15 male) IBM PC/AT (5-pin DIN male) Serial RS-232 (DB9 female) EHN048-0xxx VGA (HD15 male) IBM PS/2 (6-pin mini-DIN male) PS/2 (6-pin mini-DIN male) EHN051-0xxx Mac (DB15 male) Mac (4-pin mini-DIN male) N/A EHN215-0xxx Coaxial CPU Adapter Cables: Video Type (Connector on Cable) Keyboard Type (Connector on Cable)
APPENDIX C: Pinout of RS-232 Port Appendix C: Pinout of RS-232 Port The table below shows the pinout of the ServSwitch’s RJ-12 (“6-wire RJ-11”) female RS-232 port. 2 5 1 6 1 8 Pin 654321 Signal Name Abbrev.
SERVSWITCH™ AND SERVSWITCH ULTRA™ Appendix D: The LK461 Keyboard Some of the computers manufactured by Compaq® subsidiary Digital Equipment Corporation come with a special keyboard called the DEC LK461. The ServSwitch supports this keyboard by passing through unaltered the scan codes of certain proprietary keys (such as [Help] and [Do]) and remapping others (such as [PF1] through [PF4]). The ServSwitch maps the special keys of the LK461 as shown in the table below.
APPENDIX E: Installing the ServSwitch Overlay Option Board Appendix E: Installing the ServSwitch Overlay Option Board (SW720C-R3) E.1 Introduction The ServSwitch Overlay Option Board, our product code SW720C-R3, is an extra circuit board that can be installed in the current generation of regular ServSwitches and ServManagers to add on-screen menus to the Serv unit’s functions.
SERVSWITCH™ AND SERVSWITCH ULTRA™ E.2 The Installation Procedure CAUTION! Installing the ServSwitch Overlay Option Board requires almost completely disassembling the ServSwitch or ServManager. This can be complicated and time-consuming, and it is possible to damage the Serv unit. We recommend that you let us install the Board for you at our factory—call Black Box to arrange this. If you do install the ServSwitch Overlay Option Board yourself, take every reasonable caution against static electricity.
APPENDIX E: Installing the ServSwitch Overlay Option Board Mini ServSwitch models Step 13: Overlay-Board standoffs Step 4: Backplate screws Step 14: Overlay-Board screws Step 5: Bottom screws Slimline ServSwitch models Step 7: Jack screws Step 4: Backplate screws Step 10: J3 Step 9: PCB standoffs Step 5: Bottom screws Full-size ServSwitch models and all ServManagers (not all models will have all slave PCBs) Step 7: Jack screws Step 10: J3 Step 4: Backplate screws (will be here on ServManagers)
SERVSWITCH™ AND SERVSWITCH ULTRA™ 6. Separate the Serv unit’s PCB(s) and back panel from the bottom panel, being very careful not to bend the LEDs. With the ServManager, you will have to carefully unplug the ribbon cables of the display panel (pry gently upward) and keypad (pry gently outward) from the J12 and J13 connectors respectively on the ServManager’s master PCB (printed circuit board). See Figure E-5 on page 108.
APPENDIX E: Installing the ServSwitch Overlay Option Board Mini ServSwitch models Step 13: Overlay-Board standoffs Step 14: Overlay-Board screws Slimline ServSwitch models Step 13: Overlay-Board standoffs Step 9: PCB standoffs Step 14: Overlay-Board screws Step 9: PCB standoff might also be here Step 14: Overlay-Board screws Step 9: PCB standoff might also be here Full-size ServSwitch models and all ServManagers (not all models will have all slave PCBs) Step 13: Overlay-Board standoffs Step 9: P
SERVSWITCH™ AND SERVSWITCH ULTRA™ 14. Mount the two washers included with the Overlay Option Board on the two screws that are also included. (You might have removed these from the Board’s mounting standoffs in Step 12.) Screw the screws through the bottom of the PCB’s mounting holes into the Overlay Board’s standoffs. See Figure E-2 on the previous page. For mini ServSwitch models, see also Figure E-1 on page 101; for other ServSwitch models and ServManagers, see also Figure E-4 on page 107.
APPENDIX E: Installing the ServSwitch Overlay Option Board Mini ServSwitch models Steps 11, 13: J4 Step 13: Overlay-Board standoffs J4 Slimline and fullsize ServSwitch models Step 13: Overlay-Board standoffs Steps 11, 13: J4 J4 J3 Step 10: J3 Step 9: PCB standoff might also be here Step 9: PCB standoffs All ServManager models Step 13: Overlay-Board standoffs Step 10: J3 Steps 11, 13: J4 J3 J4 J13 J12 Step 3: J12 and J13 Step 9: PCB standoffs Figure E-3. Exploded top views of the master PCB.
SERVSWITCH™ AND SERVSWITCH ULTRA™ Before putting the Serv unit’s top cover back on, test the unit as directed in steps 23 through 28. 23. Temporarily connect the Serv unit to a monitor, keyboard, and mouse, along with at least one CPU for every PCB in the Switch. (On a twelve-port unit, for example, one CPU should be attached to port 1, one CPU to port 5, and one CPU to port 9.) 24. Plug the Serv unit back in and turn it ON.
APPENDIX E: Installing the ServSwitch Overlay Option Board Slimline models Step 13: Overlay-Board standoffs Step 14: Overlay-Board screws All full-size ServSwitch models and all ServManagers (not all models will have all slave PCBs) Step 13: Overlay-Board standoffs Step 14: Overlay-Board screws Figure E-4. Exploded right-side view.
SERVSWITCH™ AND SERVSWITCH ULTRA™ Pin 1 Ribbon cable for display, to J13 on master PCB Inside of front cover Pin 1 Ribbon cable for keypad, to J12 on master PCB Pin 1 Keypad cable Surface of master PCB J12 J13 Pin 1 Surface of master PCB Display cable J12 J13 Figure E-5. The ServManager’s display and keypad cables.
APPENDIX F: Installing the 4-Port Expansion Board Appendix F: Installing the 4-Port Expansion Board (KV5x00C) (Full-Size Models Only) F.1 Introduction The 4-Port Expansion Boards for ServSwitch and ServSwitch Ultra, our KV5x00C series of product codes, are extra circuit boards that can be installed in full-size ServSwitches or ServSwitches Ultra to add four additional CPU ports.
SERVSWITCH™ AND SERVSWITCH ULTRA™ F.2 The Installation Procedure CAUTION! Installing the 4-Port Expansion Board requires almost completely disassembling the ServSwitch or ServSwitch Ultra. This can be complicated and time-consuming, and it is possible to damage the Switch. We recommend that you let us install the Board for you at our factory—call Black Box to arrange this. If you do install the 4-Port Expansion Board yourself, take every reasonable caution against static electricity.
APPENDIX F: Installing the 4-Port Expansion Board Step 2: Holes for cover screws Figure F-1. The Switch’s cover. Step 8: Nuts and washers Step 13: Jack screws Step 10: J3 Step 4: Backplate screws Step 5: Bottom screws Figure F-2. Exploded left-side view of a ServSwitch or ServSwitch Ultra with the maximum number of ports installed.
SERVSWITCH™ AND SERVSWITCH ULTRA™ 8. Unscrew and remove the nuts and washers from the screw-ends of the standoffs that poke through the topmost PCB. There will definitely be two of these standoffs at the front of the PCB; there might also be one on the narrow right-hand end. See Figure F-2 on the previous page, Figure F-4 on the next page, and Figure F-5 on page 115. 4-port models (single PCB): These standoffs will be the short, jack-screwlike affairs that serve to separate the board from the bottom panel.
APPENDIX F: Installing the 4-Port Expansion Board Step 7: Blanks Slots for CPU ports 5 through 8 Slots for CPU ports 9 through 12 Slots for CPU ports 13 through 16 (hidden) Figure F-3. The Switch’s back panel*. Step 8: Might also be a nut and washer here Step 8: Nuts and washers Step 14: Jumper J14 (on right) Step 14: Jumper J14 (on left) Step 10: J3 extenders Step 14: Jumper J14 (removed) Figure F-4. Exploded front view of a ServSwitch’s or ServSwitch Ultra’s PCB stack (16-port unit shown).
SERVSWITCH™ AND SERVSWITCH ULTRA™ 15. Put the PCB-stack-plus-back-panel assembly back together with the Switch’s bottom and front panels. (This can be very tricky. Hold the assembly at a 45˚ angle relative to the front panel—this will make it much easier to realign the LEDs with the corresponding holes in the front panel.) 16. Refasten the PCB stack to the bottom panel by screwing the screws that you removed in step 5 back in. 17.
APPENDIX F: Installing the 4-Port Expansion Board Once you reconnect the Switch to its normal system (rebuilding, if necessary, its normal configuration), you can attach additional computers to the Switch’s new CPU ports if all lower-numbered ports are occupied. Power up the system and issue a Maximum Ports command (left-[CTRL] Pxxx, where xxx is the total number of occupied CPU ports) that reflects the new ports/computers you’ve just added.
SERVSWITCH™ AND SERVSWITCH ULTRA™ Appendix G: Rackmounting the ServSwitch If you want to mount your ServSwitch in a 19", 23", or 24" rack, make sure you get the right ServSwitch Rackmounting Kit: product code RMK19M, RMK23M, or RMK24M respectively for the mini-chassis Switch models, RMK19S, RMK23S, or RMK24S respectively for the slimline-chassis models, or RMK19F, RMK23F, or RMK24F respectively for the full-size-chassis models. Each of these Kits consists of two rackmounting “ears” and four screws.
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