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Detailed Requirements (2) Req-4: The steps needed by the endpoint for emergency calling SHOULD be no different when location is withheld vs. when location is not withheld. In particular, user agents cannot require additional configuration to discover which particular environment (hiding or no hiding) they find themselves in. Req-5: The solution SHOULD work for non-SIP entities, without the ISP/IAP having to support these protocols. Req-6: The solution MUST work if PSAP boundaries have holes. |