What is the role of "SIP trunking" in Webex Calling?

SIP trunking plays a crucial role in Webex Calling by connecting traditional phone network services to the cloud. This allows organizations to leverage their existing telephony infrastructure while transitioning to a cloud-based solution. By using SIP (Session Initiation Protocol) trunks, businesses can route calls over the internet instead of relying solely on traditional PSTN (Public Switched Telephone Network) lines. This not only reduces costs associated with maintaining physical infrastructure but also enhances scalability and flexibility.

In a Webex Calling environment, SIP trunking is essential for enabling voice services, allowing seamless communication between users on the cloud-based platform and those on conventional telephony systems. It facilitates the inbound and outbound calling capabilities that are vital for everyday business operations, ensuring that organizations can efficiently manage their communication needs while transitioning to a modern cloud-based solution.