It sounds like your partner is "tripping the ring"
If this is a land line frequently this means a wet or corroded connection somewhere along the line. Try disconnecting everything at the side of the house and call it. If the problem persists call the phone company as it is on their side of the line. If not then you need to shoot the trouble in the house wiring. Good Luck
Answers & Comments
It sounds like your partner is "tripping the ring"
If this is a land line frequently this means a wet or corroded connection somewhere along the line. Try disconnecting everything at the side of the house and call it. If the problem persists call the phone company as it is on their side of the line. If not then you need to shoot the trouble in the house wiring.
Good Luck