Glossary
IVR
IVR (interactive voice response) is a phone system that plays recorded messages and routes or serves callers based on keypad presses or short spoken replies.
Also called interactive voice response, IVRS, phone menu, press 1 menu.
“Press 1 for sales, 2 for service” is the familiar form. The messages can be recorded or synthesised, and the caller chooses what happens next by pressing a key or saying a word from a fixed list.
How it works
An IVR is a decision tree. Each node plays a message and waits for an input. Each input leads somewhere fixed: another menu, a lookup such as an order status or account balance, a recorded answer, or a transfer to a person’s queue.
The number the caller dialled, often a DID or virtual number, can decide which tree they start in. Keypresses travel as DTMF tones, which the system reads reliably. Speech is understood only in narrow forms: digits, yes or no, a menu word. Anything outside the tree usually ends in “Sorry, I didn’t get that” or a hold queue.
Why it matters in India
Indian callers meet IVRs every day, from banks and telecom operators to government helplines. TRAI’s own do-not-disturb facility can be used by calling 1909 and following the IVR menu (TCCCPR 2018, Schedule II (PDF), opens in a new tab).
An IVR is good at sorting known requests at scale: existing customers who need a balance, a booking status or the right department. It is weak at sales. It can send a property enquiry to the sales queue, but it cannot ask about budget or BHK in conversation, answer a question about possession, or notice that the caller has switched to Hindi. The lead still waits for a person, and after hours that often means waiting until morning.
Example
A caller rings a developer’s 1800 number. The IVR offers: press 1 for new projects, 2 for existing bookings, 3 for Gujarati. She presses 1 and joins a queue. With an AI voice agent on the same number, she could say “3 BHK in Bopal, around ₹1 crore, possession next year” and the conversation would start from there.
Common confusions
- IVR vs AI voice agent. An IVR follows a fixed tree and accepts a narrow set of inputs. An AI voice agent holds an open conversation, understands free speech, asks follow-up questions and answers from reference documents. Many businesses run both: an IVR for existing customers and an agent for new enquiries.
- “Conversational IVR”. Vendors use the phrase for IVRs that accept natural speech at some steps. Whether a product behaves like a menu or like a conversation varies, so test what happens when a caller answers a question that was not asked.
- IVR vs IVRS. The same thing. The S stands for “system”, and Indian regulations and tenders tend to use this form.
- IVR vs outbound robocall. An IVR mostly answers incoming calls. A robocall pushes a recorded message out to a list, and in India is regulated as commercial communication when it promotes something.