Black Box SW721A-R4, SW722A-R4, KV3108SA-R4, SW724A-R4, SW723A-R4 Switching Ports Remotely Optional

Page 68

CHAPTER 4: Operation: Hardware and Keyboard Commands

4.4.2SWITCHING 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 and type or send the desired port number followed by [Enter] (a return).

NOTES

If you type or send a “?” (question mark) rather than a port number, the single or master Serv unit will send the number of the currenty selected port minus one back to the remote computer or terminal—as an 8-bit binary byte. For example, if you currently have port 1 selected, the Switch will respond to “?” with the byte “00000000” (binary zero); if you have port 3 selected, the Switch will respond with “00000010” (binary two); and so on. You must be at some kind of prompt or screen capable of displaying serially received text characters in order to see the Switch’s response.

Of course, because most terminal emulators and similar programs will interpret these values as ASCII codes, they will try to display the corresponding ASCII characters instead of decimal numbers; and because binary zero through binary thirty-one are control codes in ASCII, if you’re running the terminal emulator on an IBM PC you will probably see the port numbers displayed as odd text-graphics characters (smiley faces, hearts, etc.) that remain in the PC’s custom character set as relics of the graphics-poor days when the PC was invented. You will probably need an IBM PC ASCII-to-decimal translation table to visually identify which port numbers these displayed characters stand for.

It is also possible to write a program to run on the computer attached to the Switch’s serial port that sends “?” to determine the currently selected port and sends port numbers to switch to desired ports. If you do so, however, there’s an important fact to keep in mind. Even though the Switch will respond to “?” with pure binary values, your program will have to send each digit of each port number (as well as the question-mark and [Enter] characters) to the Switch the way a terminal emulator would: as ASCII codes. For example:

To query the Switch, send it the binary value “00111111” (hex 63), the code for the ASCII “?” character, followed by the binary value “00001101” (hex 13), the code for the ASCII [CR] carriage-return character.

To switch to port 1, send the Switch the binary value “00110001” (hex 31), the code for the ASCII “1” character, again followed by the carriage-return character.

To switch to port 25, send the Switch “00110010” (hex 32, ASCII “2”), then “000110101” (hex 35, ASCII “5”), then the ASCII [CR] again.

45

Image 68
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 Welcome to the ServSwitchTM Family SW721A-R4SW723A-R4 SW722A-R4SW724A-R4 KV3108SA-R4SW725A-R4Servswitch FCC/IC Statements Servswitch NOM Statement Contents Table of Contents Servswitch Appendix Specifications StandardsSpecifications Maximum Altitude Complete Package Operating FeaturesIntroduction Servswitch Front panel of a 2 to 1 ServSwitch SW721A-R4 Front PanelON/OFF Rear Panel CPU NMonitor Cable Requirements Equipment RequirementsInstallation Quick Setup GuideInstallation 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 Operation Hardware and Keyboard Commands Guidelines for Using the ServSwitch with Your EquipmentOperation Hardware and Keyboard Commands Monitor Video Quality vs. Distance for Original Serv Cables Video Quality vs. Distance for Coaxial Cables Keyboard-Command Summary ServSwitch’s Keyboard CommandsScan 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 Operation On-Screen Display OverviewOperation 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 Configure Overlay Color SchemeResolution Background Color and Text Color Configure Overlay Computer Label Show Computer Number Configure Security 10. The Configure securityNew password Computer Select Window 11. The computer select windowTroubleshooting Restoring Factory-Default SettingsCommon 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 Calling Black Box Shipping and PackagingAppendix a Nvram Factory Defaults Keyboard-Command SettingsOn-Screen Configuration Settings Option Default settingAccess time Seconds 16 hours, 39 minutes Appendix B Cable Product Codes Servswitch Appendix C Pinout of RS-232 Port Appendix D The LK461 Keyboard Key Pressed on Scan Code LK461 KeyboardAppendix E Rackmounting ServSwitch Figure G-1. Rackmount assemblyPage

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.