Black Box SW725A-R4, SW722A-R4, KV3108SA-R4, SW721A-R4, SW724A-R4 Send Null Byte PS/2 Type Mice only

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SERVSWITCH™

4.3.7SEND 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. In this situation, the mouse might seem to refuse to move the pointer or cursor, open windows for no reason, or exhibit other strange behavior. To get the CPU back in sync, send this command to tell the ServSwitch to send a “null byte” to the CPU’s PS/2 mouse port (this has no other effect than getting the CPU “caught up”). To issue the Send Null Byte command, press and release the left Control key, then type [N].

If the mouse still isn’t right after you issue this command, the CPU must have been two bytes out of sync. Issuing the command again should do the trick.

The CPU will be thrown out of sync if it uses a PS/2 mouse and it’s in sync when you issue this command. Issue this command two more times to get it back in sync again. This command has no effect on serial mice, or on CPUs that are not attached to your ServSwitch system through a PS/2 mouse port.

If you have version 9.01 or higher of the Microsoft mouse driver, the CPU should never get out of sync. Contact Microsoft if you would like to upgrade your Microsoft mouse driver.

4.3.8IDENTIFY ROM

Unfortunately, as with all complex equipment, problems might arise with your ServSwitch that require the assistance of technical-support personnel. One of the things technicians might want to know when they attempt to diagnose and correct your problem is the revision level of your Switch’s ROM. This command causes the ServSwitch to send the four-character “UPxx” ROM level to the currently selected CPU as ASCII keyboard data; these characters will be echoed back to the shared monitor if you are at some type of prompt. (You must be at some kind of prompt or screen capable of displaying typed-in keyboard characters, or you will not see the Switch’s response.) To issue the Identify ROM command, press and release the left Control key, then type [I].

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Contents Customer Support Information Step-By-Step Quick Install Guide for the ServSwitch Servswitch Quick Install Guide Attach your keyboard and mouse this way PS/2 equipment shown Connection sequence User-Station Connections PS/2 type user-station connections PC/AT type user-station connections RS/6000 type user-station connections SGI type user-station connections Cascade Connections Optional CPU Connections Servswitch Quick Install Guide PS/2 type CPU connections Servswitch Quick Install Guide PC/AT type CPU connections standard cable RS/6000 type CPU connections SGI type CPU connections RS-232 connection to DB9 male computer port FA042 Power Connection Page Copyright 2000. Black Box Corporation. All rights reserved SW721A-R4SW723A-R4 SW722A-R4SW724A-R4 KV3108SA-R4SW725A-R4 Welcome to the ServSwitchTM FamilyServswitch FCC/IC Statements Servswitch NOM Statement Contents Table of Contents Servswitch Appendix Standards SpecificationsSpecifications Maximum Altitude Complete Package Operating FeaturesIntroduction Servswitch Front Panel Front panel of a 2 to 1 ServSwitch SW721A-R4ON/OFF CPU N Rear PanelMonitor Equipment Requirements Cable RequirementsQuick Setup Guide InstallationInstallation Procedure Connecting Cpus Connecting Submasters Optional Kernel is bad, load new kernel through serial port Chapter Cascading in ServSwitch Systems Cable Requirements for Expansion Basic ServSwitch cascading Cascading with Matrix ServSwitch submasters Kernel is bad, load new kernel through serial port Installation Guidelines for Using the ServSwitch with Your Equipment Operation Hardware and Keyboard CommandsOperation Hardware and Keyboard Commands Monitor Video Quality vs. Distance for Original Serv Cables Video Quality vs. Distance for Coaxial Cables ServSwitch’s Keyboard Commands Keyboard-Command SummaryScan OFF Commands in Detail Scan Mode Reset Send Null Byte PS/2 Type Mice only Display Label Using the RS-232 Port Switching Ports Remotely Optional Upgrading the Firmware with Terminal-Emulation Software Receive successful Hit space to program Upgrading the Firmware with the DOS Copy Command Operation Hardware and Keyboard Commands Overview Operation On-Screen DisplayOperation On-Screen Display Configure system Configure SystemChanging the mouse type Servswitch Changing the maximum number of computers Configure System Expansion Units Configure System Scan Time Typematic Rate Configure computers Configure ComputersChanging a computer’s name Changing a CPU port’s keyboard mode Changing a CPU port’s mouse type Color Scheme Configure OverlayResolution Background Color and Text Color Configure Overlay Computer Label Show Computer Number 10. The Configure security Configure SecurityNew password 11. The computer select window Computer Select WindowRestoring Factory-Default Settings TroubleshootingCommon Problems YOU CAN’T Switch Ports from the Keyboard Servswitch Scans or Switches to Empty or Nonexistent Ports Your Mouse DOESN’T Move the POINTER/CURSOR Your ON-SCREEN Display is not Synchronized Shipping and Packaging Calling Black BoxKeyboard-Command Settings Appendix a Nvram Factory DefaultsOption Default setting On-Screen Configuration SettingsAccess time Seconds 16 hours, 39 minutes Appendix B Cable Product Codes Servswitch Appendix C Pinout of RS-232 Port Key Pressed on Scan Code LK461 Keyboard Appendix D The LK461 KeyboardFigure G-1. Rackmount assembly Appendix E Rackmounting ServSwitchPage

SW725A-R4, SW722A-R4, SW723A-R4, KV3108SA-R4, SW724A-R4 specifications

The Black Box SW721A-R4, SW724A-R4, KV3108SA-R4, SW723A-R4, and SW722A-R4 are cutting-edge network switches that cater to the demanding needs of modern data environments. These models are designed to provide high performance, reliability, and advanced features suitable for both enterprise-level deployments and smaller networks.

The SW721A-R4 and SW724A-R4 are primarily layer 2 switches that support essential networking protocols such as IEEE 802.1Q for VLAN tagging, ensuring secure and efficient traffic management. With robust forwarding capabilities, these switches boast high-speed Gigabit Ethernet ports, which enable seamless data transfer and reduce latency in data-driven applications. Their fanless design also ensures quiet operation, making them ideal for office settings and noise-sensitive areas.

Another noteworthy addition is the KV3108SA-R4, a versatile KVM switch that provides remote management capabilities. This model can control multiple servers and computers from a single console, allowing IT personnel to streamline operations and reduce physical space requirements. With support for high-resolution video output and an intuitive user interface, the KV3108SA-R4 enhances usability while maintaining efficiency in server management.

The SW723A-R4 and SW722A-R4 models further enhance network capabilities with their advanced Layer 3 functions. These switches support static routing and dynamic routing protocols, making them suitable for complex networking scenarios. They are equipped with a comprehensive set of security features, including port security and access control lists (ACLs), ensuring that sensitive information is well-protected against unauthorized access.

All of these Black Box models operate on advanced technologies such as QoS (Quality of Service), which helps prioritize critical traffic and ensures optimal performance during peak usage periods. Additionally, they support Power over Ethernet (PoE), enabling the powering of network devices such as IP cameras and VoIP phones without the need for additional electrical outlets.

In summary, the Black Box SW721A-R4, SW724A-R4, KV3108SA-R4, SW723A-R4, and SW722A-R4 represent a fusion of performance, versatility, and security in network infrastructure. These switches are perfect for businesses looking to enhance their connectivity solutions, ensuring that they can meet the demands of an increasingly digital world while maintaining high standards of efficiency and reliability.
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