I had a similar issue with MGCP gateways and conferences.Though in my case it was becuase of the mute button. The bug number is CSCdv05532. The workaround is to enter the following command in global configuration mode
MGCPVG(config)#no mgcp timer receive-rtcp
If no good look for a similar bug in you IOS train you are using
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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 ...