answerback drum
1voice answerback — (VAB) Provides voice responses to inquiries made from telephone type terminals. The audio response is composed of a limited digitized voice vocabulary prerecorded on a magnetic drum or disk file and produced by an audio response unit and a… …
2Telegraphy — (from the Greek words (τηλε) = far and (γραφειν) = write) is the long distance transmission of written messages without physical transport of letters. Radiotelegraphy or wireless telegraphy transmits messages using radio. Telegraphy includes… …
