House traps are like running S traps, notorious for clogging, dangerous to cable. I would remove it, make sure all your floor drains in the basements have traps on them depending on the age. Install cleanouts (2) going both directions to give yourself access both ways. Those 2-way cleanouts serve no purpose when there is a clog; you cannot see what direction the cable is going taking a chance you could go the wrong direction. Not good if noone is in the house to let you know you are going the wrong way. EEEEEEEEEEEEK!