Automate inbound communications with the best IVR systems. Personalize experience with call center IVR systems. Enhance efficiency with IVR calling system features. a cloud-based number that can receive calls and route them to conventional numbers and destination apps; it is not connected to a physical phone line. Three alternatives are available to you: local number, toll-free number, and mobile number. Choose toll-free numbers to improve brand image and save callers money, or local numbers to project a local business presence.