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  2. EIA-530 - Wikipedia

    en.wikipedia.org/wiki/EIA-530

    Currently known as TIA-530-A, but often called EIA-530, or RS-530, is a balanced serial interface standard that generally uses a 25-pin connector, originally created by the Telecommunications Industry Association. Finalized in 1987 (revision A finalized in 1992 [1]), the specification defines the cable between the DTE and DCE devices.

  3. RS-232 - Wikipedia

    en.wikipedia.org/wiki/RS-232

    A DB-25 connector as described in the RS-232 standard Data circuit-terminating equipment (DCE) and data terminal equipment (DTE) network. In telecommunications, RS-232 or Recommended Standard 232 [1] is a standard originally introduced in 1960 [2] for serial communication transmission of data.

  4. Serial port - Wikipedia

    en.wikipedia.org/wiki/Serial_port

    An IBM PC serial card with a 25-pin connector (obsolete 8-bit ISA card) A PCI Express ×1 card with one 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

  5. 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.

  6. D-subminiature - Wikipedia

    en.wikipedia.org/wiki/D-subminiature

    The above naming pattern was not always followed. Because personal computers first used DB-25 connectors for their serial and parallel ports, when the PC serial port began to use 9-pin connectors, they were often labeled as DB-9 instead of DE-9 connectors, due to an ignorance of the fact that B represented a shell size. It is now common to see ...

  7. 25-pair color code - Wikipedia

    en.wikipedia.org/wiki/25-pair_color_code

    A common application of the 25-pair color code is the cabling for the Registered Jack interface RJ21, which uses a female 50-pin miniature ribbon connector, as shown in the following table. The geometry of the pins of the receptacle (right hand image) corresponds to the pin numbers of the table.

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