[geeks] Q: regarding wiring RJ45 to DB9 adapters

Michael Parson mparson at bl.org
Sun Nov 15 18:12:42 CST 2015


On 2015-11-10 16:27, Lionel Peterson wrote:
> Hello all,
> 
> I had a need to make a 'straight' (not null modem) 9 pin serial female 
> to 9
> pin serial female cable, so rather than pay $20 for an extension cable 
> and
> double-female adapter I picked up a couple of the above mentioned 
> adapters for
> much less...but... Is there any standard for wiring these up? For this
> application, I could easily invent my own wiring scheme but I'd rather 
> make
> these adapters 'standard' if there is one.
> 
> 
> Anyone have a link (or am I over-thinking this)?

I'm late to the discussion on this, but the one I like is the Yost 
method:

http://yost.com/computers/RJ45-serial/

I made up a set of those many years ago and still keep them in my laptop 
bag.

-- 
Michael Parson
Austin, TX
KF5LGQ


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