Hello Jacob,1) Do you have other users with mailboxes? Does MWI work properly? Is only one user effected by MWI issue?2) Try to send a voice message to this user (let's call it A) from another one? Does MWI go on?3) Try to dial MWI on and MWI off ext...
You mentioned RTP packets. What is the source and destination address? (Is it on telco side?)Have you tried to decode RTP stream? Check outgoing RTP packets. If they contain "normal voice" - the issue isn't on CUCM Check incomming RTP packets. What ...
As it was mentioned by Aman you must install device pack before upgrading 8941 FW"The Cisco IP Phone 8941 and 8945 support a new "secure by default" feature from 9.3(1) onwards, which requires devpack 8.0.3(24049)/8.5.1(14070)/8.6.2(22030) or highe...