Black Box SW627A-R2, SW628A-R2 manual Video Quality vs. Distance for Original Serv Cables

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CHAPTER 4: Operation

The ServSwitch Jr. will support SVGA (Super VGA) video, but with original Serv cables the video quality for SVGA and Mac video will decrease markedly at higher resolutions and distances. Table 4-1 illustrates this. The distances in the table are total cable lengths measured from the CPU to the monitor.

Table 4-1. Video Quality vs. Distance for Original Serv Cables

Distance

5' (1.5 m)

10' (3 m)

15' (4.6 m)

20' (6.1 m)

25' (7.6 m)

Resolution

 

 

 

 

 

640 x 480

3

3

3

3

3

800 x 600 noninterlaced

3

3

3

2

2

1024 x 768 interlaced

3

3

2

2

2

1024 x 768 noninterlaced

3

2

2

2

2

1280 x 1024 interlaced

2

1

1

1

1

1280 x 1024 noninterlaced

2

1

1

1

1

1600 x 1280 noninterlaced

2

1

1

1

1

Quality 3 = Near perfect; screen defects are not conspicuous

Quality 2 = Good to very good; images are clear; there are small reflections around text lettering depending on the color; screen defects are sometimes conspicuous

Quality 1 = Fair to poor as distance increases; images run from slightly fuzzy to badly smeared; text runs from fuzzy but readable to completely washed out

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Contents SW627A-R2 SW628A-R2 Welcome to the ServSwitchTM Family Servswitch JR. MP RADIO-FREQUENCY Interference Statements Servswitch JR. MP NOM Statement Contents Table of Contents Specifications Temperature Tolerance IndicatorsConnectors PowerIntroduction Operating FeaturesComplete Package Introduction Front Panel LEDs 1, 2, 3PS/2 Panel Label Connector DescriptionRear Panel NoneCable Requirements Equipment RequirementsConnecting the Monitor, Keyboard, and Mouse InstallationRackmounting Optional Connecting the CPUs Powering Up the System Switching from the KeyboardOperation CpusOperation Monitor Video Quality vs. Distance for Original Serv Cables Video Quality vs. Distance for Coaxial Cables Keyboard-Command Summary ServSwitch Jr. MP’s Keyboard CommandsCtrl Commands in Detail Send Null Byte PC Cpus with PS/2 Mouse Ports only SET Maximum Ports SW628A-R2 only Servswitch JR. MP Typematic Delay Typematic Rate E0 Standard Mapping 104/105-Key Keyboard, PC Users E1 Swapped Mapping 104/105-Key Keyboard, Mac Users SET Mouse Translation PC Cpus with Serial Mouse Ports only Troubleshooting Restoring Factory-Default SettingsCommon Problems SW628A-R2 only Your Mouse Driver DOESN’T Load PC Cpus only Your Mouse DOESN’T Move the POINTER/CURSOR ONE or Both of Your PC Cpus Lock UP When YOU Start Windows Calling Black Box Shipping and PackagingAppendix a Nvram Factory Defaults Option Factory-Default To Change To Save Setting ChangesAppendix B Cable Product Codes Appendix B Cable Product Codes Appendix C Rackmounting ServSwitch Jr. MP Figure C-1. Rackmount assemblyCustomer Support Information

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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