What are two possible ways to achieve the goal?

You are managing a Microsoft Teams environment for a company. You are setting up direct routing on a partner-hosted session border controller (SBC).

The SIP proxy does not receive SIP options from the SBC.

You need to resolve the issue.

What are two possible ways to achieve the goal? Each correct answer presents a complete solution.

NOTE: Each correct selection is worth one point.
A . Ensure that the Secure Real-Time Transport Protocol (SRTP) is enabled.
B . Replace the partner-hosted SBC with a self-deployed SB
D . Ensure that the SBC certificate is from a trusted Certificate Authority (CA).
E . Modify the FQDN in the SIP profile to match the SBC certificate.

Answer: C,D

Explanation:

Reference: https://docs.microsoft.com/en-us/microsoftteams/troubleshoot/phone-system/direct-routing/sip-options-tls-certificate-issues