A private telephone company has installed its network cables alongside my co axial cable tv network?

Question

causing interference, what should be done amicably

Answer 1

Are you sure the network cables are causing the interference? If so I would report it to the cable company and let them handle it.

Answer 2

normal telco and ip wiring is twisted pair, made that way so that the leakage current field is cancelled. TV coax has a braid covering that acts as a perfect shield for the interior wire. Interference is a truly rare occurance.  because telephone must pass DC current, a faulty connector on that line would cause it to not work at all and therefore could not cause interference. My guess is the Cable TV has a faulty connector at the trunk line, which would be easy for them to fix. I am assuming that you have not made any creative cable TV connections yourself.