Cisco TAC has said it is directly related to an ITL file sych issue with the phone. The best way to fix it 100% of this time on any phone Is factory default reset. Never mind what firmware is on the phone as it is not common to one device or firmware load. Do this:
1 – unplug lan cables from back of phone
2- press and hold # key down and don’t let go
3- plug wires back in while still holding # key down
4- with # key still held in, wait for sequence of lights to blink next to line selection buttons. Should take maybe 1 min for this to happen
5- when lights blink in sequence, release # key
6- enter 1 2 3 4 5 6 7 8 9 * 0 #
7- wait a full 5 minutes or more for phone to fully download it’s software. It will say different things on the screen but eventually will fully load and reboot.
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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 ...