Personally, I would consider using the B-ACD TCL script on the gateway. That way you can have resilience against UCCX failure as well (or even get rid of it completely :-)
There is no way to do that since you can't have JTAPI integration with SRST. I would make sure you have the alias command under call-manager-fallback and have inbound numbers at least his an extension during a failover.
You could run SRST as CME, but UCCX can be integrated with one or the other. So as an alternative you can implement second UCCX server and integrate it with CME (SRST).
Alternatively you can configure BACD on the router as a backup when site is in CME (SRST) mode.
Personally, I would consider using the B-ACD TCL script on the gateway. That way you can have resilience against UCCX failure as well (or even get rid of it completely :-)
Unfortunately it's not that simple as UCCX does not include H323 nor SIP protocols, so dial-peers can not be used.
UCCX uses JTAPI for call control for which you need either CallManager or CallManager Express.
HTH,
Chris
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