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RE: on NAT-PT

> The SIP proxy can handle SIP translation. However there also needs to
> be a translator to handle traffic (e.g. video streaming on UDP) translation.

But as far as I understand this space (not very far at all)
the box that handle the media streams need to be instructed by the SIP proxy
for what mappings to create - it can't just be a plain old NAT-PT box.
Thus it starts looking more like an UDP proxy for the purposes of carrying
RTP which is controlled by the SIP proxy - not a NAT-PT which creates
state based on the packets that fly by.

  Erik