Crystal Image Technologies KVM-IP8 Manual do Utilizador descarregar pdf (Página 3)

2007 ATEN Technology, Inc. www.aten-usa.com

Why Network Administrators Should Explore the “V” in K-V-M Switches

The Video Resolution Evolution -- A Step Back in Time

Serial VDTs

Early mainframes and minis used serial terminals. These video display terminals (VDTs) were (and still

are) monochromatic screens that display ASCII characters, often with a built-in keyboard, and never

with a mouse. VDTs are still prevalent today, and are used with some Sun, Unix and Linux systems as

well as mainframes.

Digital Video

Early PC monitors utilized digital TTL signals (Transistor-Transistor Logic) to convey video from the

display adapter card to the monitor. The video standards involved are no longer in use, but included:

MDA (Monochrome Display Adapter), CGA (Color Graphics

Serial Data Connectors for ASCII Terminal Interface (DB-9 & DB-25)

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