How to Fix a Hum in a Phone Line (2024) [Video]

A persistent hum on a home phone line can be incredibly frustrating, making it difficult to hear conversations and communicate. You don’t have to wait for a technician to solve this annoying problem. With some simple troubleshooting steps, it’s possible to pinpoint the source of the humming disturbance and implement a permanent solution.

This guide walks through the process of identifying and fixing a phone line hum, from isolating the source to addressing common causes like wiring issues and electromagnetic interference.

The first step in fixing a phone line hum is determining whether it’s coming from the internal home wiring or the external phone network. The interface box, where the external network connects to the home’s internal wiring, is the starting point for this investigation.

Checking the Interface Box

To isolate the source of the hum, follow these steps:

1. Locate the interface box on the exterior wall of your house where the phone line …