AI Voice Telephony Glossary: 20 Key Industry Terms

The percentage of total dialed phone calls that successfully connect to a live human recipient. Unconnected calls include busy lines, unanswered dials, and network drops.

The capability of an AI voice agent to detect when a human caller begins speaking mid-sentence, immediately halting speech synthesis to listen and respond naturally.

The acoustic pipeline component that converts raw audio speech from the caller into structured text strings in real time with sub-200ms latency.

The voice synthesis engine that transforms written words into realistic human-sounding speech, incorporating authentic Indian accents, pacing, and emotional intonation.

The seamless transition between two or more languages or dialects within a single conversation, such as switching effortlessly between Telugu and Indian English.

Distributed Ledger Technology registration mandated by the Telecom Regulatory Authority of India (TRAI) for commercial SMS and voice senders to prevent spam and verify enterprise identities.

Session Initiation Protocol technology that connects a business VoIP telephony system to the traditional Public Switched Telephone Network (PSTN) via internet data lines.

The total round-trip time delay between a human caller finishing their sentence and the AI voice agent commencing its vocal response, ideally under 500 milliseconds.

A commercial pricing model where customers are billed strictly for calls where a live human answers, charging ₹0.00 for unanswered, busy, or unreachable dials.

An algorithmic filter that distinguishes between human vocal speech sounds and ambient background noise, static, or call-center hum.

A foundation neural network trained on vast text corpora that processes customer intent, reasons through business logic, and formulates conversational answers.

Constrained software rules and state machines placed around an LLM to prevent hallucinations, ensuring 100% adherence to verified company pricing and policies.

The statutory Indian registry where telephone subscribers register their preference not to receive unsolicited commercial communications (Do-Not-Disturb / DND).

In e-commerce, when a Cash on Delivery (COD) parcel is returned to the seller due to non-delivery, fake orders, or buyer refusal, causing dead logistics costs.

The exact duration between a customer submitting an online inquiry form and the sales team initiating a live telephone call to engage them.

A formal commitment made by a loan or credit card borrower during a collection call agreeing to settle an overdue amount by an agreed-upon calendar date.

The final categorized outcome of a telephone interaction, such as Meeting Booked, Callback Requested, Unanswered, Wrong Number, or Not Interested.

The percentage of inbound customer support inquiries resolved completely during the initial phone call without requiring subsequent follow-up interactions.

An open-source technology enabling web browsers and mobile apps to stream high-definition real-time voice audio without external software plugins.

Legacy automated telephony menus that require callers to press keypad digits ("Press 1 for Sales"), in contrast to modern natural conversational AI.