These indicate that the Dialer is having trouble dialing. I would recommend opening a case with Cisco. Include whether this is IPCC or some other ACD, what version of switch and IPCC. TAC will instruct you on what logs to collect if necessary.
To me, it sounds like a configuration error which should be relatively easy to clear up with proper diagnosis.
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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 ...