There are some fairly easy ways to check the equipment inside your home:
- Does your phone get noisy when your move the cord? If so, check that the cord is snug, both going into the handset and into the wall jack.
- Check your phone cords for damage. Even small nicks and cuts can cause noise on your line. Replace any damaged cords.
- If the problem only happens with one phone, try plugging a different phone into the jack and place a call from the new phone to see if the issue is resolved.
- If you have internet service, unplug your modem and then check if you still have noise on your line. If you don't hear noise when you disconnect your modem, the problem could be with your DSL filters. Examine your filters to make sure they're connected and installed correctly.
To test your jacks:
- Unplug your phone from both the jack and electrical outlet.
- Unplug any other equipment from that same jack.
- After you've unplugged all your equipment, wait 1 minute and then plug in a corded phone.
You should hear a clear, strong dial tone when you test each jack. If you don't, and no other equipment is plugged in, you may have a problem with your inside wiring.
If you do hear a clear, strong tone, then continue to plug in additional equipment, one thing at a time, and listen each time. When you hear the noise again, you'll know you've either reached the maximum capacity for that line or the last piece of equipment you connected is causing interference. Try moving that equipment to a different line. If you're finding interference but don't want to unplug the offending piece of equipment, try installing a radio suppresser or radio/noise filter on your line.