You can not ring 2 phones at 2 sites across a Qsig at the same time, using MCG or phantoms. It would not let you create a PhDN of 500 if it already exist in the Network DN table. The PhDNs don't work accross qsig.

Not everything works perfectly across a QSig. They are really 2 switchs connected, rather then 2 parts of 1 big switch. Just try parking and calls accross qsig.