I attempted to upgrade a Cisco 7940 IP Phone IOS to version 8-12-00 the latest firmware. Before I upgraded I noticed that the copyright date on the phone was 2004 so the IOS had to have been 6X and noticed that On the screen it says ,"Protocol Application Invalid" no matter what I do. I am trying to take it to the latest revision. I have reset the phone and it does pull and address but I cannot update the firmware on any version, it simple returns back to "protocol application invalid"I cannot figure out how to get this resolved. I think what I did was that I upgraded the IOS to 8.12-00 and should have followed the matrix from 6X and eventually get to 8.12. How does one get to where he needs to be? I have tried to unlock the phone using **# and I cannot get past this screen and I cannot get to the phone via the web browser as well. Can anyone point me in the right direction. thanks
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 ...
This document describe how DST changes and how time changes are
implemented in DST. Daylight Saving Time (DST) is the practice of
setting the clocks forward 1 hour from standard time during the summer
months, and back again in the fall, in order to make b...