As your endpoints are registered there may be Dial Rules actions applied to calls. If you use DMA as a call server refer to 'Call Server Configuration' section in DMA Operation Guide for more details.
WBR,
Mike
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“Reports that say that something hasn't happened are always interesting to me, because as we know, there are known knowns; there are things we know we know. We also know there are known unknowns; that is to say we know there are some things we do not know. But there are also unknown unknowns- the ones we don't know we don't know.”
― Donald Rumsfeld
