Cable Colors

Jay R. Ashworth jra at
Tue Jun 17 21:15:22 UTC 2008

On Tue, Jun 17, 2008 at 01:28:38PM -0400, Joe Abley wrote:
> The initial cable install for the pre-provisioned servers was done  
> with much planning and documentation by people who did data cabling  
> for a living, and was correspondingly tidy. The cables were all blue.  
> Any change that was required after that was installed using a red cable.
> Once per week the data cabling people would return, within a posted  
> window, and replace the temporary red patch cables with cut-to-length,  
> tested, blue cables which were run according to the larger cabling  
> strategy, and rigourously documented.

Ah yes, the 'purple wire' technique.

I forget which book it's mentioned in, but it had to do with really old
wire-wrapped computer boards.  If you had to put in such a 'hack' wire,
you did it in purple so it would stand out.

-- jra
Jay R. Ashworth                   Baylink                      jra at
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