Hi,
Why dont you use a gatekeeper.
Configure a gatekeeper, then configure a h.323 ICT trunk (gatekeeper controlled) on each cluster.
Then create Route patterns to the different clusters and assign the greated ICT-gatekeeper controlled trunk to the Route patters.
NB: You will need to configure Zone prefixs on the gatekeeper to route calls for each cluster.
HTH, pls rate useful posts
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