1. SEP<>.cnf.xml file for those phones to see if they have the lower firmware version specified. You can pull the cnf files from the CUCM server using cmd on Windows (tftp -i <ip addr> get sep<>.cnf.xml)
2. Clear the Trust List from the phones.
3. Try taking packet captures from the phone to see if the CUCM is not responding to the phone with the ITL file.
4. There is an ITLSEP<>.cnf.xml for every phone as well. See if you can pull that too.
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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 ...