How do I fix a cordless phone that says LINE IN USE when no one is on a call?
Answer
A stuck LINE IN USE message usually means the base still thinks a line is off-hook, often from a handset, jack, or base glitch. Unplug the base from power and the phone line for a full minute, then reconnect and re-register handsets if needed.
Before you start: stop right away if…
- Unplug equipment before changing line cords to avoid damaging ports.
Follow these steps
Hang up every handset and accessory phone
Press Off/End on every cordless handset and hang up any corded phones on the same line, including kitchen or bedroom phones.
You should see: No extension is intentionally off-hook before resetting the base.
Unplug base power and phone line for one minute
Unplug the base power adapter and disconnect the phone line cord from the base. Wait a full 60 seconds so the stuck off-hook state can clear.
You should see: After waiting, the base is fully powered down.
Reconnect and test dial tone
Plug the phone line into the base first, then restore power. Wait for the base to boot and check whether LINE IN USE clears and dial tone is available.
You should see: Handsets show a normal idle state and can place a call.
Re-register handsets if they stay offline
If a handset cannot link after the reset, follow the manufacturer registration steps to register it to the base again.
You should see: All handsets reconnect and remain idle without a false LINE IN USE message.
Not sure this is the right page? Check here
0 of 5 checked
Extra tips
What to look for: LINE IN USE on every handset, whether any handset screen is still lit as in-call, and base power/line lights.
Before you change anything: Locate the main base that connects to the wall phone jack. Note how many handsets are registered. Unplug by the adapters, not by pulling cord conductors hard. Have the handset registration steps from the manual available if possible.