SERVSWITCH™

4.4 Using the RS-232 Port

4.4.1CONNECTING EQUIPMENT TO THE PORT

For your convenience, a computer or terminal with an EIA/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. You’ll need a straight-through-pinned, flat-satin or twisted-pair serial cable with RJ-12 (“6-pin RJ-11”) connectors plus the appropriate adapter: for IBM type PCs and most terminals, either DB25 female to RJ-11 female (our product code FA044) or DB9 female to RJ-11 female (our product code FA043), depending on your computer/terminal.

To connect the adapter and cable, take these steps:

1.Connect an adapter of the appropriate type to one of the computer’s (or terminal’s) serial ports.

2.Plug one end of the cable into the RJ-12 female connector on the adapter, and the other end into the RS-232 serial port on the ServSwitch’s rear panel.

CAUTION!

Serial cabling in excess of 50 feet (15.2 m) should be routed with caution. The maximum cable length depends upon the construction of the cable and its routing. For extended runs, shielded cable should be used . Avoid routing near fluorescent lights, air - conditioning compressors, or machines that may create electrical noise. If you experience a lot of data errors, use shorter cables. The ServSwitch’s lowest data rate is 9600 bps; it cannot be lowered any further to alleviate this problem.

44

Page 67
Image 67
Black Box KV3108SA-R4, SW722A-R4, SW721A-R4, SW724A-R4, SW723A-R4, SW725A-R4 manual Using the RS-232 Port

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.