VOIP in China


We’ve already rolled out asterisk within our office, and have external access and the rest all sorted.

We are shortly to be opening an international office in the PRC. I know the regulations around VOIP changed recently in China.

Does anyone have any expertise in this area?

Specifically, can we use IAX between our PBX here in the UK, and another asterisk box in our office in China? - I realise that technically we can, but what are the legal implications?
This would drastically reduce our costs for communicating between the two offices.