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Problem Statement Destination VSP can be member of several VoIP peering fabrics. may also accept calls over the Internet from certain parties. Calling VSP needs to find a path to the destination VSP. can also be member of some (potentially different) VoIP peering fabrics. Trial and Error during call-setup is not a good idea. Thus he needs to discover which peering fabrics they share. How does the calling VSP do this? |