SERVSWITCH™

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. Note that the LK461 has no Num Lock LED and its Hold Screen LED is equivalent to the Scroll Lock LED on other keyboards.

Key Pressed on

Scan Code

LK461 Keyboard

Sent to U.S. CPU

[Find] [Insert Here] [Remove] [Select] [Prev] [Next] [F13] [F14]

[F15] / [Help]

[F16] / [Do]

[F17]

[F18]

[F19]

[F20]

[PF1]

[PF2]

[PF3]

[PF4]

Keypad [–] (minus key)

Keypad [,] (comma key)

Left [Compose]

Right [Compose]

[<] / [>] (grtr. than/less than key)

[Home]

[Insert]

[Delete]

[End] [Page Up] [Page Down]

Same (passed through unaltered) Same (passed through unaltered) Same (passed through unaltered) Same (passed through unaltered) Same (passed through unaltered) [Print Screen]

[Scroll Lock] [Pause] [Num Lock]

Keypad [/] (slash or divide key) Keypad [*] (asterisk or multiply key) Keypad [–] (minus key)

Keypad [+] (plus key)*

Keypad [+] (plus key)

Same (passed through unaltered) Right [Control]

[`] / [~] (accent grave/tilde key)**

*Keypad [–] is always mapped this way in Mode 2; in Mode 3, the mapping varies by country.

**This mapping varies by country; that is, the key is mapped differently depending on what keyboard country or language the CPU is configured to accept.

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Black Box SW725A-R4, SW722A-R4, KV3108SA-R4 manual Appendix D The LK461 Keyboard, Key Pressed on Scan Code LK461 Keyboard

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.