# IVR
> Interactive Voice Response – automated phone menu system that interacts with callers

IVR (Interactive Voice Response) lets callers navigate menus using voice or keypad input.

## What is IVR?
Interactive Voice Response (IVR) is a telephony technology that allows callers to interact with an automated system using voice commands or DTMF keypad input. IVR systems typically greet callers with pre-recorded prompts and route them to the appropriate department, agent, or self-service option.

## IVR in VoIP systems
In [VoIP](/voip-glossary/voip/) environments, IVR works closely with [ACD](/voip-glossary/acd/) to efficiently route and queue calls. Cloud-based IVR can be updated in real time, making it easy for service providers to customize call flows for their business customers.

## Related Terms
- [ACD](/voip-glossary/acd/)
- [PBX](/voip-glossary/pbx/)