Interactive Voice Response is the technology that powers automated phone menus. IVR menus are recordings that answer incoming calls by prompting callers with commands like “press 1 for sales” or “say ‘customer service’ for support.” The IVR system interprets the voice command or number tone to route calls through a VoIP PBX. This way, callers can easily reach the correct person or department through a company’s main number without the need for a live receptionist.