The messages button is used to dial whatever you put in the service parameter voicemail under service -> service parameters click on Cisco Call Manager. You will need to do this on all servers in your cluster and you will probably have to stop and start the Call Manager service to get it to work. Yes this is usually what you are using for voicemail like Unity or whatever else you may be using.
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The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
the softkeys. You enable or disable them via TCL. Here is the long
answer. Be sure to read the whole thing or e...
Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...