Before installing new firmware, I wrote out current firmware name in "Device Default". Then after installing new firmware I've copied new firmware name and inserted it on a specific phone's page(field "phone load name" or similar). And then inserted the old firmware name instead of new one in Device Defaults.
No need to reinstall old firmware cause it is stored on TFTP
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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 ...