To find out if an internet or home phone connection problem is inside your home or outside in the CenturyLink network, you can check for an active signal at the "network interface device" (NID).
The NID is the point where our outside wiring (the provider network) connects to your inside wiring (the subscriber network). Some customers call it the telephone box or network box, while technicians usually call it "the NID."
This device is about 6 by 9 inches and gray (or painted to match the house). It's most often on the outside of the home near the electric meter. Sometimes it's in the basement or attic. It's usually labeled "Network Interface Device" or "Telephone Network Interface" on the outside.
Network interface device (NID) with "Customer Access" on the side
Provider access for multi-tenant housing
DO NOT OPEN
Provider access for fiber internet (ONT)
DO NOT OPEN
Then follow the steps below:
1. Use the screwdriver to open the CUSTOMER ACCESS portion of the telephone network box.
2. Locate the test jack that has a short wire plugged into it. Unplug that wire from the test jack. In some cases, there are two test jacks; you can pick either one to unplug and run your test.
Important! Once you're done testing, be sure to plug the original wire back into the test jack (the reverse of step 1). Then close the box cover and tighten the screw securely.
Need assistance? Contact technical support by phone or chat. We're here to help!
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