Which ISPs was that with? I’ve never actually had a landline on fiber ever. It was always just standard Ethernet on top of which I run whatever I want (SIP cli

Which ISPs was that with? I’ve never actually had a landline on fiber ever. It was always just standard Ethernet on top of which I run whatever I want (SIP client or WiFi calling). How was that “landline” working? Do they give you a little converter that turns Ethernet into a standard phone jack (and converts it to SIP internally), or is there some other non-IP based signaling for that voice traffic?