speermint-5----Page:11
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FW-B-2
Approach A (slide 2)
Alice
Bob
FW-B-1
FW-A
Bob's Call Controller
Alice's Call Controller
Alice’s Policy Server
Bob’s Policy Server
183 or 200From: BobTo: AliceIP=Z, UDP=z, Token=B1
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Z, z
STUNResponse
informational
PPT Version