Telephony & Infrastructure

DTMF (Dual-Tone Multi-Frequency)

/ dtmf-dual-tone-multi-frequency /

The touch-tone signals produced by phone keypads. Voice agents use DTMF for menu input, verification codes, and IVR interop.

Why it matters

Keypad input still matters — IVR handoffs, verification codes, menu fallbacks. Agents that can’t handle DTMF break in exactly the moments users switch to it.

Related — Telephony & Infrastructure

Call Queuing

Call Routing

Cold Start Latency

Concurrent Calls

Contact Center

Conversation Buffering

Conversational IVR

Dynamic Routing

Edge Voice Processing

IVR (Interactive Voice Response)

‹ Drop-Off Analysis

Dynamic Routing ›

DTMF (Dual-Tone Multi-Frequency)

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