Which Bell Labs researcher is most credited for the core IVR mechanism integrating DTMF signaling?

Answer

Dr. Stephen John Boies

Dr. Stephen John Boies and his team at Bell Labs in the early 1970s are frequently given the most significant credit for developing the core mechanism that defines modern Interactive Voice Response. Their breakthrough involved successfully integrating Dual-Tone Multi-Frequency (DTMF) signaling, which is generated when pressing phone keypad buttons, directly with computer logic. This integration was transformative because it enabled the system to interpret the caller’s input digitally, thereby moving beyond simple voice detection mechanisms to allow for structured, digital interaction via the telephone keypad. This DTMF interactivity established the essential 'Response' structure necessary for automated phone menus.

Which Bell Labs researcher is most credited for the core IVR mechanism integrating DTMF signaling?
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