Cloud telephony services
Cloud telephony is a Unified Communications as a Service (UCaaS) solution and is convenient, cost-effective, and customizable as well. Cloud telephony has exciting features like toll-free numbers, IVR systems, number masking, voice broadcasting, bulk SMS, etc.
Cloud-based call center solution is the best choice for businesses, irrespective of size.
https://office24by7.com/blog/15-best-cloud-telephony-and-on-premise-call-center-solutions-in-the-world/