ICE with Policy Authorization, Slide 1 Alice Bob FW-B FW-A Bob's Call Controller Alice's Call Controller STUNRequest 2 5 INVITEFrom: AliceTo: BobIP=X, UDP=x, Token=A1 1 7 9 8 11 12 X, x Alice’s Policy Server Bob’s Policy Server 3 4 6 10 informational |