My cordless landline keeps saying 'line in use' but the phone isn't being used. I've reset the modem and it's still not working. What else can I do? - Quora
My cordless landline keeps saying 'line in use' but the phone isn't being used. I've reset the modem and it's still not working. What else can I do? - Quora
![Phone Socket Wiring - BT Master Socket, The Orange and White and Other Mysteries - Telecom Green Ltd Phone Socket Wiring - BT Master Socket, The Orange and White and Other Mysteries - Telecom Green Ltd](https://telecomgreen.co.uk/tcomgreenweb/wp-content/uploads/2019/04/cw1308-3pr-2.jpg)