Rotary and early push button landlines used a real bell struck by an electric mechanism, which created the ringing pattern most people now recognise as the classic telephone sound. As mobile phones replaced home landlines, recordings of that bell survived as novelty ringtones, stock effects for film and television, and shortcuts online for signalling an old call. Its continued use is less about realism than recognition, since even viewers who never owned a rotary phone understand instantly what the ringing means and expect someone to answer it.