Andy's solution above works - the dial-peer 91 entries on each router in his example should have a destination-pattern set to match your range of extensions and point at the other SRST router.
For example, if all your extensions are in the range 1000-1999, you could have
in the dial-peer. If an extension (e.g. 1001) is registered to Router A, router A will have an invisible dial-peer pointing to that extension - so it will route any calls received to that phone.
If it doesn't have a phone registered with 1001, it will route it to the next best match - the dial-peer 91 with destination-pattern 1xxx. This points to the other SRST router, which will have the extension registered...
The same applies to carrier resources - just have dial-peers configured with appropriate preference values to direct calls to the other router via H323.
p.s. Please rate helpful posts...
Please remember to rate helpful posts to identify useful responses, and mark 'Answered' if appropriate!
The short answer is that you don't.... That isn't entirely true while at
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the softkeys. You enable or disable them via TCL. Here is the long
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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
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