I remember  when I joined  a consulting  company then,   Telex, Packet switching, arcnet,  ethernet,  token-ring,  co-axial   cable   was the thing,  twisted pair was just beginning to be the  new way of connecting networks augmented by Balun converters.    Many networking   techs  do not  understand  the concept  of twisted pair,    it was  a very  busy starting  few months   troubleshooting  the previous  work of my colleagues, when  I realized  their   twisted pair mistakes. ... View more