Ensure that your inside wire is connected properly at the demarcation point. You can determine a lot about the inside wiring problems by listening to sounds on your telephone line:
- Static: Wires could be wet, pierced or loose at a connecting point. Carefully check all wires and connections.
- Buzzing: A wire may have come into contact with metal, other than the connection terminals. Is any exposed copper wire touching the box or other metal around the jack? Check that colours have been matched correctly.
- Dead Air: Wires may be crossed. Is there a contact between any exposed copper from wires of different colours (red crossed with green if 2-pair wire is being used; or blue crossed with white if 3-pair wire is being used)?