This Technical Report (TR) analyzes a basic set of services commonly provided in the circuit-switched Public Switched Telephone Network (PSTN), and addresses the technical issues surrounding possible support of these services in a mixed circuit-switch/packet-switched environment and in the future all-packet-switched Next Generation Network (NGN).
More ATIS standard pdf
ATIS 0700031
Location and Routing Support for Non-Operator-Managed Over the Top (OTT) Citizen-to-Authority Emergency Services
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