As I recall, DPNSS pretty much has one way of requesting this feature.
CCM has some service parameters that control it the QSIG equivalent (under the CAllManager service parameters).
In your VG30D there will be settings to enable Route Optimisation on the DPNSS side, and path optimization on the QSIG side, and some other settings... so there are a few places where you might need to change settings.
So - are you sure that it's CallManager rejecting the connection? PBX-guy will say it is, but you have the VG30D in between which you also need to consider. Does that have the feature enabled on both trunks?
Have you checked the traces on the CallManager side?
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