7. References Routing

[RFC3966] – The tel URI for Telephone Numbers
[RFC3482] – Number Portability in the Global Switched Telephone Network (GSTN): An Overview.
[RFC4694] – Number Portability Parameters for the "tel" URI.
[RFC6116] – The E.164 to Uniform Resource Identifiers (URI) Dynamic Delegation Discovery System (ENUM).
[RFC6749] – The OAuth 2.0 Authorization Framework.

[3GPP TS 23.003] – Numbering, Addressing, and Identification.
[3GPP TS 23.066] – Support of Mobile Number Portability (MNP) – Technical Realization (Stage 2).
[3GPP TS 29.002] – Mobile Application Part (MAP) Specification.
[3GPP TS 29.328] – IP Multimedia Subsystem (IMS) Sh Interface; Signalling flows and message contents.