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Null modem

communications, hardware
A cable, especially an EIA-232 cable, for connecting serial ports on two computers directly, rather than via modems. Since, according to the specification, both computers should transmit on pin three of their EIA-232 connectors and receive on pin two, a null modem cable needs to connect one computer’s pin two to the other’s pin three and vice versa. It also needs to have male connectors at both ends (again, according to the specification).


Read Also:

  • Nullo

    [nuhl-oh] /ˈnʌl oʊ/ noun, plural nullos. 1. (in certain card games) a bid to take no tricks.

  • Null-sequence

    noun, Mathematics. 1. a sequence that has zero as its limit.

  • Null-space

    [nuhl-speys] /ˈnʌlˌspeɪs/ noun, Mathematics. 1. the set of elements of a vector space that a given linear transformation maps to zero.

  • Null-terminated multibyte string

    programming (NTMBS) (Defined in the ANSI C++ draft) [Different from null-terminated string?] (1995-10-02)

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