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  2. Null modem - Wikipedia

    en.wikipedia.org/wiki/Null_modem

    A null modem adapter. Null modem is a communication method to directly connect two DTEs (computer, terminal, printer, etc.) using an RS-232 serial cable.The name stems from the historical use of RS-232 cables to connect two teleprinter devices or two modems in order to communicate with one another; null modem communication refers to using a crossed-over RS-232 cable to connect the teleprinters ...

  3. Category 5 cable - Wikipedia

    en.wikipedia.org/wiki/Category_5_cable

    Cross section of a cat 5e cable. The Category 5e specification improves upon the Category 5 specification by further mitigating crosstalk. [9] The bandwidth (100 MHz) and physical construction are the same between the two, [10] and most Cat 5 cables actually happen to meet Cat 5e specifications even though they are not certified as such. [11]

  4. RS-232 - Wikipedia

    en.wikipedia.org/wiki/RS-232

    The current version of the standard is TIA-232-F Interface Between Data Terminal Equipment and Data Circuit-Terminating Equipment Employing Serial Binary Data Interchange, issued in 1997. The RS-232 standard had been commonly used with serial ports and serial cables. It is still widely used in industrial communication devices.

  5. Serial port - Wikipedia

    en.wikipedia.org/wiki/Serial_port

    A four-port serial (RS-232) PCI Express ×1 expansion card with an octopus cable that breaks the card's DC-37 connector into four standard DE-9 connectors A converter from USB to an RS-232 compatible serial port—more than a physical transition, it requires a driver in the host system software and a built-in processor to emulate the functions ...

  6. Serial cable - Wikipedia

    en.wikipedia.org/wiki/Serial_cable

    Serial cables are typically used for RS-232 communication. A serial cable or RS-232 cable is a cable used to transfer information between two devices using a serial communication protocol. The form of connectors depends on the particular serial port used. A cable wired for connecting two DTEs directly is known as a null modem cable.

  7. Rollover cable - Wikipedia

    en.wikipedia.org/wiki/Rollover_cable

    This cable is typically flat (and has a light blue color) to help distinguish it from other types of network cabling. It gets the name rollover because the pinouts on one end are reversed from the other, as if the flat cable had been rolled over. This cabling system was invented to eliminate the differences in RS-232 wiring systems. Any two RS ...

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