In the integration of Cisco Unity Connection using SIP, which SIP trunk security profile option is required for MWI to work correctly?

In the integration of Cisco Unity Connection using SIP, which SIP trunk security profile option is required for MWI to work correctly?
A . Accept out-of-dialog refer
B . Accept replaces header
C . Accept unsolicited notification
D . Accept presence subscription

View Answer

Answer: C

Explanation:

Reference:

https://community.cisco.com/t5/collaboration-voice-and-video/understanding-troubleshooting-mwi-on-unity-connection/ta-p/3162948