What is the difference between copper and fibre Home Landline Connection options?

A copper (PSTN) landline is the traditional phone line that runs over dedicated copper wires — simple, and it keeps working during a power cut because the line carries its own power. A fibre/VoIP landline delivers your calls as data over your broadband connection; the call quality is often clearer and the calling plans cheaper, and you get a normal landline number. The main trade-off is power: a VoIP line depends on your router and mains electricity, so it stops working in an outage unless you have a battery backup. Copper is winding down in many areas, so most new fixed lines are fibre/VoIP.f