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En esta página puede obtener un análisis detallado de una palabra o frase, producido utilizando la mejor tecnología de inteligencia artificial hasta la fecha:
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- etimología
Qué (quién) es X 21 - definición
MILITARY AIRCRAFT
Northrop X-21A; X-21A; X-21; Northrop N-250
Northrop X-21
The Northrop X-21A was an experimental aircraft designed to test wings with laminar flow control. It was based on the Douglas WB-66D airframe, with the wing-mounted engines moved to the rear fuselage and making space for air compressors.
X.21
![X.21 adaptor for a Japanese [[NEC PC-98]].](https://commons.wikimedia.org/wiki/Special:FilePath/Backpanel of InterCOM 98 INTELLIGENT COMMUNICATION ADAPTER PC98 6751B (15986540312).jpg?width=200 "X.21 adaptor for a Japanese [[NEC PC-98]].")
ITU-T TELECOMMUNICATIONS INTERFACE SPECIFICATION
X.21bis; X21
<communications, standard> A digital signaling interface
recommended by ITU-T that includes specifications for
DTE/DCE physical interface elements, alignment of {call
control} characters and error checking, elements of the call
control phase for circuit switched services, data transfer
at up to 2 Mbps, and test loops. 64 kbps is the most
commonly used transfer rate.
(2000-02-28)
X.21
ITU-T TELECOMMUNICATIONS INTERFACE SPECIFICATION
X.21bis; X21
X.21 (sometimes referred to as X21) is an interface specification for differential communications introduced in the mid-1970s by the ITU-T.
Wikipedia
Northrop X-21
The Northrop X-21A was an experimental aircraft designed to test wings with laminar flow control. It was based on the Douglas WB-66D airframe, with the wing-mounted engines moved to the rear fuselage and making space for air compressors. The aircraft first flew on 18 April 1963 with NASA test pilot Jack Wells at the controls. Although useful testing was accomplished, the extensive maintenance of the intricate laminar-flow system caused the end of the program.
