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Detailed Requirements (5)
Req-13: The solution MUST NOT interfere with the use of LoST for non-emergency services.

Req-14: The solution MUST allow a VSP to verify that the call is indeed destined for a PSAP.

Req-15: Calls may reach a PSTN gateway, rather than the PSAP directly.

Req-16: The solution MUST NOT significantly increase call setup latency.
PPT Version