The particular phone is used for emergency outbound calls, so, I don't know if the ringer is turned off.
The daycare's director says that the phone hasn't impacted their DSL service, but, I can't confirm or deny this. My way of thinking is, if you subscribe to DSL, filter everything except the modem, so, I dug out one that had been lying around in my storage area, plugged it in one day a while back when the daycare was closed due to the pandemic and checked to make sure that the dial tone was clean & that I could call out.
