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How Public is Public?
Routing of calls is done normally by analyzing the "public" identifier of the called party entered by the calling party.
It is obvious that on IP-based networks IP-based names and addresses will be used for routing, so:
What are the "public" identifiers an end-user will enter?
Or to make it simple: What identifiers does one put on his business card?
Do I have to put on my business card: sip:richard.stastny@a1.net (valid only within vodafone networks)
PPT Version