Black Box Explains...RS-232.
RS-232, also known as RS-232C and TIA/EIA-232-E, is a group of electrical, functional, and mechanical specifications for serial interfaces between computers, terminals, and peripherals. The RS-232 standard was developed by... more/see it nowthe Electrical Industries Association (EIA), and defines requirements for connecting data communications equipment (DCE)—modems, converters, etc.—and data terminal equipment (DTE)—computers, controllers, etc.) devices. RS-232 transmits data at speeds up to 115 Kbps and over distances up to 50 feet (15.2 m).
The standard, which is functionally equivalent to ITU V.24/V.28, specifies the workings of the interface, circuitry, and connector pinning. Both sync and async binary data transmission fall under RS-232. Although RS-232 is sometimes still used to transmit data from PCs to peripheral devices, the most common uses today are for network console ports and for industrial devices.
Even though RS-232 is a “standard,” you can’t necessarily expect seamless communication between two RS-232 devices. Why? Because different devices have different circuitry or pinning, and different wires may be designated to perform different functions.
The typical RS-232 connector is DB25, but some PCs and other data communication devices have DB9 connectors and many newer devices have RJ-45 RS-232 ports. To connect 9-pin PC ports or RJ-45 to devices with 25-pin connectors, you will require a simple adapter cable. collapse
Black Box Explains...Electronic vs. manual switches.
Whats the difference between electronic and manual switches? Are the benefits of electronic switches worth the price increase over manual switches?
As you might imagine, the inner workings of manual switches... more/see it noware far simpler than those of electronic switches. When you turn the dial of a manual switch, internal connections are physically moved. This is great for less complex applications, but it can cause voltage spikes that can damage particularly sensitive equipment such as laser printers.
Because electronic switches do their switching with solid-state components, you have more control in advanced applications. For example, our AC-powered, code-operated, and fallback switches offer numerous options for out-of-band management of critical network resources. They give you the remote control your operation may need. You can control your high-end applications and sensitive equipment via computer, modem, or even touch-tone phone—a convenience simply not available with manual switches. collapse
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