Collaboration Communications Systems Engineer

The online PSTN gateway being disabled would result in outbound PSTN calls failing while still allowing inbound PSTN calls, as the gateway needs to be operational to handle outbound call routing.

To achieve the requirement of routing calls to multiple users and having calls route differently after business hours, 'call queues' and 'auto attendants' should be implemented. Call queues allow the sales department to distribute incoming calls to multiple users, ensuring that calls are handled in an orderly manner. Auto attendants can manage calls by providing automated responses and routing options based on the time of day, allowing the system to route calls differently after business hours.

The issue outlined in the question is related to TLS connectivity status being inactive, which indicates a problem with the secure connection between Microsoft Teams and the certified Session Border Controller (SBC). An inactive TLS connectivity status typically points to problems with the SSL/TLS certificates used by the SBC. Specifically, the SBC might be missing required root certificates, such as Baltimore or Digicert root certificates, which are essential for establishing a trusted TLS connection. Without these root certificates, the SBC cannot properly authenticate and encrypt the signaling traffic, leading to call placement issues. Therefore, ensuring the correct root certificates are present on the SBC is crucial to resolving this problem and establishing an active TLS connection.