Homepage › Forums › Fix-it Forum: Home Improvement & Do It Yourself Repair Forum › Adding a phone line This topic contains 1 reply, has 0 voices, and was last updated by Paul C. 20 years, 5 months ago. Author Posts September 23, 1997 at 3:29 pm #10535 Mark Freudenberg To add an extention to the existing phone line coming into the house must you start at the incoming line to the house or can you splice a tap into an existing wire? If a splice can be made, what is the easiest and best way to do this? September 23, 1997 at 5:35 pm #76365 Paul C. I’ve done it by splicing into another outlet, or whereI can splice in most easilly, works good for me. Author Posts You must be logged in to reply to this topic.