I have a ” candle stick ” phone , made in 1915 , it doesnt even have a rotary dial , but I can get incoming calls on it , and both parties can hear each other perfectly . The ringer used to work , but is broken now , dont want to take the base apart to look at it lol .

MountainBiker ,
No worries , I used to live in Maine , their infrastructure isnt the best . A lot of people in the country there still use dial up for internet , thats all they can get .