IVR: definition and a practical example
Short answer: An IVR (Interactive Voice Response, called URA in Brazil) is the system that answers calls without a human agent, plays recorded messages and routes callers based on DTMF keypresses or speech.
In Portuguese: URA
What is an IVR?
An IVR (Interactive Voice Response, known in Brazil as URA) is the system that answers a call without a human agent, plays a recorded greeting and offers a menu such as “press 1 for billing, 2 for support”. Callers respond with the phone’s keys, sent as DTMF tones, or by speaking, on IVRs with speech recognition. The IVR then transfers the call to a queue, an extension or an automated service, such as reissuing a payment slip.
The IVR usually lives inside the IP PBX or a contact center platform, behind an 0800 (toll-free), 0300 or 4004 number. So a failure can be in several places: in the number’s routing at the carrier, in the trunk, in the PBX or in the IVR application itself. To the caller, these failures all sound alike: a silent call, a busy signal, a carrier message or the wrong greeting.
One trait helps a lot with testing: an IVR answers every call. It does not get busy like a person or miss a call because it went to lunch. If the call gets a busy signal or rings until it drops, that alone is a sign of trouble.
In practice
A company publishes its customer service on an 0800 number and the IVR answers on the PBX. What the caller hears, and what it usually means:
| What the caller hears | Typical SIP response | Situation |
|---|---|---|
| The company’s greeting | 200 OK | IVR working |
| “Your call could not be completed” | 183 Session Progress, no 200 | Carrier message; the IVR was never reached |
| Busy signal | 486 Busy Here | Channels exhausted or IVR frozen |
| Rings until it drops | 480 Temporarily Unavailable | IVR did not answer |
| Silence after answering | 200 OK with no audio | Audio (RTP) failure |
For example, if the IVR freezes for 30 minutes at a time of day with 2,000 calls per hour, about 1,000 customers go unserved before anyone notices the drop in queue volume.
How Monitor uses this
An IVR circuit passes when the call is answered and the chosen greeting is heard. If the carrier is the one speaking, with an error message in place of the greeting, the test fails. A busy signal or no answer also counts as a failure, because an IVR answers every call. See how toll-free and IVR monitoring works.
Frequently asked questions
How do I know whether the IVR is down?
Call it as a customer would and listen to what plays. A healthy IVR answers and plays the right greeting. A busy signal, ringing with no answer, silence after it picks up or a carrier message in place of the greeting all point to a failure. Looking only at the IVR server is not enough, because the problem can be in the number, the trunk or the carrier's routing.
Are URA and IVR the same thing?
Yes. URA (Unidade de Resposta Audível) is the name used in Brazil and IVR (Interactive Voice Response) is the English term. Both describe the system that answers the call, plays recorded messages and directs callers through keypresses or speech recognition. In vendor and contact center documentation, the two names appear side by side.