CUC MWI SIP Trunk not working

[jaheshkhan]

CUC and CUCM are integrated with SIP trunk. but when users receive voice mail no MWI light showing for them.

I have checked every thing with configuration. but nothing missing. what could be the reason?

Version 11.5

[Maren Mahoney]

To be specific about things you've checked:

• Redirecting Diversion Delivery Header - Inbound is checked
• Redirecting Diversion Delivery Header - Outbound is checked
• Rerouting Calling Search Space is set
• Out-Of-Dialog Refer Calling Search Space is set
• SIP Trunk Security Profile has the 'three checks'

The additional CSSes are often missed.

If all is set, can you pull a trace of CUC attempting the MWI to CUCM?

Maren

[Nithin Eluvathingal]

SIP integration:

1. Check the following on the SIP trunk security profile:

-              Accept Out-of-Dialog REFER

-              Accept Unsolicited Notification

-              Accept Replaces Header

In case of SIP integration, CUC sends SIP notify messages to the phone system to turn the MWI on or OFF so “Accept unsolicited notification” should be checked under SIP profile assigned to the trunk.

2. The calling search on the trunk should have the partition assigned to the directory number of user.

(c). Things to check on CUC for Platform issues:

1.    Make sure the connection notifier service is activated on the primary server.
2.    Cluster health check: Make sure the cluster is in healthy status with the output of the command "show cuc cluster status"

In unity connection cluster, while both servers can answer the calls and take messages but the connection notifier service responsible for MWI is activated only on the primary server and not on the secondary.

https://community.cisco.com/t5/collaboration-knowledge-base/understanding-troubleshooting-mwi-on-unity-connection/ta-p/3162948

2.12.0.0