"Type your password into your telephone" DTMF/Touch-Tone wasn't introduced until 1963 (and then being an extra-cost option from the Bell System). So more like

"Type your password into your telephone" DTMF/Touch-Tone wasn't introduced until 1963 (and then being an extra-cost option from the Bell System). So more like "Dial your password into your telephone". Rotary phones didn't have Q or Z either.