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Does anyone know where we can download the actual definition document? If so, please add it as a link in the article.
Not a protocol
editI think EIA 422 is more of a "signalling standard" than a "protocol" - it doesn't specify much related to communications, more just voltage levels and slew rates. There is a terrible tendancy to broaden the use of terms into uselessness - a wheel isn't just round, it's "an implementation of circular technology". --Wtshymanski 18:55, 3 June 2006 (UTC)
Pin assignment
editI have come to believe that connector pin assignments, specifically for DB9 connectors, were not standardized in the RS422 specification. Is this true? If it is true, the article should include a short statement about this, and the rationale. Now it appears that if I get a USB-RS422 adapter, I have to worry about each manufacturer's choice for the pin assignment. —The preceding unsigned comment was added by 157.127.124.15 (talk) 19:23, 5 February 2007 (UTC).
- RS-422 is only the electrical characteristics of a signal. Pin and signal assingments using RS-422 electrical levels are in RS-449 (DB-37), RS-530 (DB-25), et. al.--J Clear 12:36, 27 April 2007 (UTC)
Logo
editIs the logo shown twice in the below photo for EIA-422? -- Beland (talk) 12:18, 11 July 2008 (UTC)
- Again showing the limitations of icons as a means of communication (they only convey meaning if you already know what they mean). Could be, but why not write "EIA-422" on the ports if that is what they are intended to be? I'm not aware that the standard designates an icon to label ports. --Wtshymanski (talk) 13:53, 11 July 2008 (UTC)
see also Apple Din-8 serial Adapter
with http://h20000.www2.hp.com/bc/docs/support/SupportDocument/bpm01154/c00124442.jpg —Preceding unsigned comment added by 77.21.15.238 (talk) 13:52, 12 May 2010 (UTC)
