SRST is not currently supported over HSRP and CSCtz96320 was opened. It might work, but it is not recommended.
Technically, when you configure (in CCMAdmin) the SRST Group information, you are telling the phone what router IP address to use when no CallManager is available. For SRST, you would specify the virtual HSRP IP Address, instead of the interface or loopback address you currently use. When the phone falls into SRST mode, it will try to connect to this specified address, and HSRP will direct the requests to the appropriate hsrp-active router.
Unfortunately the official standpoint is this is not supported.
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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 ...