Application layer support for MMTel; MMTel Enabler Server Services; stage 3
The present document specifies the stage 3 protocol and data model for enabling the support of MMTel enabler Services for vertical applications and Controlling Application Server. It provides stage 3 protocol definitions and message flows, and specifies the API of MMTel-2/3 offered by the MMTel enabler server. The stage 2 application layer architecture, functional requirements, procedures and information flows necessary for MMTel Service are contained in 3GPP TS 23.392 [2].