When a SIP Integration is done between CUCM and Unity Connection, MWI sometimes fails to work. I feel SCCP is more easier to troubleshoot when compared to SIP.
SCCP uses MWI Directory Numbers to turn ON and OFF Message Waiting Indicator. But SIP does not use MWI Directory Numbers to turn ON and OFF MWI. Unity Connection sends SIP NOTIFY Message to Cisco Unified Communication Manager.
- Login to Cisco Unified Communication Manager
- Go to Device > Trunk > Verify that Unity Connection Trunk configured on CUCM has Inbound CSS configured. The inbound CSS should have the Partitions of the Directory Numbers configured.
- Go to System > Security > SIP Trunk Security Profile > Verify the Profile configured/used by the Unity Connection Trunk has the following parameters checked.
Accept out-of-dialog refer
Accept unsolicited notification
Accept replaces header
- Login to Cisco Unity Connection > Users > Search for the user for whom MWI is not working
- Go to Edit > Message Waiting Indicators > Reset MWI for the Subscriber/Voicemail Box
Now the MWI Light should be turned ON.
- Differentiate between Restricted CUCM and Unrestricted CUCM - March 12, 2018
- Re-enable debugs on router reload – EEM Script - March 12, 2018
- Configure Cisco CUBE SIP Options Ping - January 30, 2018
- Unified Messaging with Cisco Unity Connection & Office 365 - January 4, 2018
- Transfer/Hold/Conf Buttons Not Working – Cisco 78XX IP Phone - November 20, 2017
- Track Media Resource (Transcoder) Utilization via RTMT - November 15, 2017
- Installation & Configuration of Expressway C & E – MRA - September 17, 2017
- CUCM BAT Import Error 19145 An Alternate Number can only… - August 30, 2017
- Cisco Jabber Auto Discovery Service – SRV Records - July 15, 2017
- Running VMWare ESXi 60 days trial license? Reset the license - July 15, 2017