Unable to make a call

Anonymous
2023-03-02T15:07:42.3066667+00:00

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

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  1. SokiGuo-MSFT 25,496 Reputation points Microsoft Vendor
    2023-03-03T06:01:15.57+00:00

    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://video2.skills-academy.com/en-us/microsoftteams/troubleshoot/phone-system/direct-routing/sip-options-tls-certificate-issues?source=recommendations

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