This is a very old bug (ID: CSCdj47610) which is resolved in 12.0 and above IOS so I presume you are running a rather old version of IOS on the 3810.
The problem lies with the dspware on the old version of 3810 and the only way around this problem is to upgrade. Be sure to upgrade all your voice 3810s if you have more than one. Recommended IOS is latest versions of 12.1 mainline and 12.2 mainline. They are available on CCO under software center. Be sure to check memory requirements prior to loading IOS onto flash.
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...