hello guys, im a phone guy who runs network cable sometimes. i ran a cat5 run from ground floor to the roof, the air cond people needed it for the equiptment. they put the conduit from the roof to the 4th floor phone room and from there it was streight down to the second floor. at that point i had to go across the hall to the first floor phone room. the line tested good when i was done. been a few months ago. now the maintence man for the building said they dont always get connected and the guys who put in the equiptment say its a bad line. i will be going to check it monday. at this point i want to use my tester on it and then put it on a network at the first level and see if i can get online with a laptop on the roof. any ideas to help me trouble shoot this one. thanks dave