CHAPTER 4: Operation: Hardware and Keyboard Commands

ASCII text file (not XMODEM, ZMODEM, etc.). The Switch will send back a series of ASCII period (“.”) characters (decimal 46, hex 2E) that shows the progress of the file-copying procedure. It will also flash LED 1 or 4 (depending on the data rate). Once the file transfer is complete, the Switch should light LED 2 and send the message:

Receive successful

Hit space to program

If something goes wrong during this process, you might receive any of these messages instead:

Checksum error or Record error or Data error

Receive failed

Try again Y/N?

These messages are usually caused by one of these problems:

•The RS-232 cable or adapter is loose, too long, defective, or incorrectly pinned;

•The terminal emulator’s setting for the serial port, data rate, data format, and/or file-transfer protocol is wrong; or

•Either the PC’s serial port or the Switch’s RS-232 port is defective.

To try again, press “Y” on the PC’s keyboard; the ServSwitch goes back to step 1 and sends “Waiting for file...”. To abort, press “N” on the PC’s keyboard; the Switch skips ahead to the “Hit enter to boot” message shown in step 5, but the firmware will remain unchanged. If the trouble recurs and you can’t pinpoint it, call Black Box for technical support.

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. If this phase is successfully completed, the Switch will begin verifying the new firmware; it will send the message:

Verifying flash

This will be followed by a third series of progress-indicating ASCII periods. If verification is successful, the Switch will light LED 3 and send the message:

Verify successful

Hit enter to boot

If you get an error message at any time during the programming or verifying phase, call Black Box for technical support.

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Black Box SW723A-R4, SW722A-R4, KV3108SA-R4, SW721A-R4, SW724A-R4, SW725A-R4 manual Receive successful Hit space to program
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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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