CallingONE

CallingONE is a fully managed Direct Routing solution for Microsoft Teams and Azure Communication Services that enables organizations to seamlessly integrate enterprise telephony into the Microsoft cloud.

As a managed Session Border Controller (SBC) service, CallingONE provides the complete infrastructure, operation, and maintenance required to connect Microsoft Teams Phone/Azure Communication Services to the Public Switched Telephone Network (PSTN) in a secure and reliable manner.

By eliminating the need for on-premises SBC infrastructure, CallingONE reduces operational complexity while accelerating deployment. Organizations benefit from a highly available, scalable, and compliant telephony integration tailored for enterprise requirements.

CallingONE supports flexible connectivity models, including Bring Your Own Carrier (BYOC), multi-carrier environments, and hybrid telephony architectures, allowing customers to retain existing provider relationships while modernizing their communications platform.

Key capabilities include:

Fully managed, cloud-based SBC infrastructure

Certified and secure Direct Routing integration with Microsoft Teams / Azure Communication Services

High availability and global scalability

Support for multi-tenant and multi-carrier scenarios

End-to-end monitoring, lifecycle management, and support

Compliance with enterprise-grade security and regulatory requirements

CallingONE empowers organizations to transform their communication landscape by leveraging Microsoft Teams as a central collaboration and telephony platform—ensuring flexibility, reliability, and future readiness.

This service is ideal for organizations aiming to modernize legacy telephony systems and adopt Microsoft Teams Phone / Azure Communication Services with minimal effort and maximum control.

Please reach out to us regarding information on pricing! Pricing is generally based on the amount of parallel sessions rather than users.