CHAPTER 5: Troubleshooting

5.2 Common Problems

5.2.1A CPU CONNECTED TO YOUR SWITCH DOESN’T BOOT, AND YOU GET A KEYBOARD OR

MOUSE ERROR

A. First make sure that the CPU is in fact connected to the ServSwitch Jr. MP and that the Switch is receiving power. (One of the Switch’s numbered CPU ports must be cabled to the keyboard port of a powered CPU in order for the Switch to work properly.)

B. If the Switch is ON, make sure its keyboard and mouse settings are correct.

C. If the configuration is OK, check your cables. Tighten any loose connections. If the keyboard and mouse strands of the CPU Cable have been reversed, plug them into the proper ports.

D. If you don’t find a cable error, try swapping in different keyboards and/or mice one at a time. If the problem goes away when you substitute a device, the old one might have gone bad.

E. If swapping input devices doesn’t solve the problem, begin swapping your cables one at a time. If the problem goes away when you substitute a cable, the old cable is probably defective.

F. If swapping cables doesn’t solve the problem, and the Switch is a 4-port (SW628A-R2) model, try plugging the CPU into the other CPU port on the Switch that’s designed for that platform (that is, the other PC port or the other Mac port). If the CPU boots when it’s connected to a different port, the old port is probably defective.

G. If you’re using an SW627A-R2 or if swapping ports doesn’t solve the problem, try plugging a known-good keyboard and mouse directly into the CPU that’s having the problem. If the CPU boots, the Switch might be defective; call Black Box.

H. If the CPU still doesn’t boot, the CPU’s keyboard or mouse port (or other components) might be defective. (If the CPU’s Power LED doesn’t light, the fuse on the CPU’s motherboard might be blown.) If you still have them, plug that CPU’s original monitor, keyboard, and mouse into it and try again. If the CPU does not boot with its original equipment, something in the CPU is defective; call the CPU’s manufacturer. If the CPU does boot, there is some kind of unusual mismatch between that CPU and the shared monitor, keyboard, or mouse; call Black Box for technical support.

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Black Box SW627A-R2, SW628A-R2 manual Common Problems
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SW627A-R2, SW628A-R2 specifications

The Black Box SW627A-R2 and SW628A-R2 are advanced network switches designed to enhance the efficiency and reliability of modern data networks. These switches are ideal for various applications, including data centers, enterprise networks, and industrial settings, providing robust performance and flexibility for a wide range of tasks.

The SW627A-R2 model features 24 Ethernet ports, allowing for seamless connectivity across a broad array of devices. Its 10/100/1000 Mbps auto-sensing capabilities ensure that all connected devices can communicate effectively, making it an excellent choice for businesses looking to maximize their existing infrastructure. The switch is designed with energy efficiency in mind, featuring IEEE 802.3az Energy Efficient Ethernet technology. This integration helps in reducing power consumption and minimizing operational costs without compromising performance.

On the other hand, the SW628A-R2 model takes things a step further by offering 48 ports, accommodating even larger networks with ease. This switch also supports Power over Ethernet (PoE), which allows it to deliver power to connected devices such as IP cameras, VoIP phones, and wireless access points, eliminating the need for additional power sources and simplifying network installation.

Both models support Layer 2 switching and feature advanced forwarding techniques such as store-and-forward and cut-through modes. They also come equipped with a user-friendly interface for easy configuration and management, with options for SNMP monitoring to ensure optimal performance and troubleshooting capabilities.

From a security perspective, both the SW627A-R2 and SW628A-R2 incorporate features such as VLAN support, port security, and access control lists (ACLs). These features help in segmenting network traffic, preventing unauthorized access, and enhancing overall network integrity.

In terms of durability, both switches are designed for robustness, with sturdy enclosures suitable for various environments. The fanless design also ensures silent operation, making them suitable for office settings.

Overall, the Black Box SW627A-R2 and SW628A-R2 network switches are designed to meet the demands of advanced networking environments, providing the necessary features and technologies to facilitate efficient, secure, and scalable operations. Whether for a small business or a large enterprise, these switches provide a reliable backbone for any network infrastructure.
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