RJ45 to DB9 console adapter wiring quick setup guide.  First purchse a DB9 to RJ45 adapter as below.  It will come looking like the one below.  Looks harder then it is but it is designed to be made and remade hence why it's shipped this way.  The pins plug in to the female terminator like USB ports plug into PC's.  In case you have other non standard devices, the setup can be quickly adapted to that as well.  Here it is:

Credits: http://www.lammertbies.nl/comm/cable/yost-serial-rj45.html

Cheers,
TK