[150174] in North American Network Operators' Group
Re: Common operational misconceptions
daemon@ATHENA.MIT.EDU (Bob Vaughan)
Sat Feb 18 02:20:34 2012
From: Bob Vaughan <techie@w6yx.stanford.edu>
To: nanog@nanog.org
Date: Fri, 17 Feb 2012 23:19:21 -0800 (PST)
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
"Ethernet/Token Ring/Cisco Console/whatever uses an RJ45 connector"
RJ45 defines a keyed 8P8C type connector, wired in a specific
manner, for a specific 2 wire telco service. Incompatible with the
above on several levels. "RJxx" == specific connector/wiring pattern
for specific telco applications. Non-telco uses need not apply.
One of these days I'm going to start carrying around some actual RJ45
type cables to hand out to those who ask.
"DB9"
DB defines a D series subminiature connector with a size "B" (nominal 25 pin)
shell. DE defines a size "E" (nominal 9 pin) shell. DA15, DB25, DC37, DD50,
DE9, etc.. Also DB13W3 (old Sun monitors), etc. If in doubt, refer to
ITT/Cannon catalogs. (my oldest is from 1971).
--
-- Welcome My Son, Welcome To The Machine --
Bob Vaughan | techie@{w6yx|tantivy}.stanford.edu | techie@tantivy.net
AF6RR | P.O. Box 19792, Stanford, Ca 94309 | 1-650-469-3850
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