Unable to make a call

Question

We have configured the phone system,but when we call from SBC using direct routing, we cannot make calls on SBC.

Answer 1

Hi @Anonymous

When setting up Direct Routing, you encounter an issue with the SBC not responding, which is most likely caused by one or both of the following conditions:

• A TLS certificate experiences problems.
• An SBC is not configured correctly for Direct Routing.

You could try the solutions in the reference document below. For more details, you could refer to: https://learn.microsoft.com/en-us/microsoftteams/troubleshoot/phone-system/direct-routing/sip-options-tls-certificate-issues?source=recommendations

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