Hi. How do you recommend testing cat 5 network cables once they have been fished through a house. It would appear that some cables in the house are not working. If the cable were not run I would be in able to have both ends very close together, but now one end is at one end of the house and the other end is in the basement. So I am thinking I need something to put in the RJ-45 female socket and something at the other end of the RJ-45 male connector. This must be a common problem. How is this normally tested?