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+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. http://creativecommons.org/licenses/by/4.0
+.. Copyright 2017 Huawei Technologies Co., Ltd.
+
+SO R1 Interfaces
+================
+
+.. image:: images/SO_R1_1.png
+
+Service Orchestrator in R1 uses interfaces from both the MSO seed code and as well as new interfaces between the new components of ONAP. 
+The below documentation of the SO APIs and are reviewed in the architecture committee meeting on 22/08/2017.
+
+See :download:`SO_API_v0.1.pdf`
+
+The interface between UUi and SO for the E2E VoLTE service:
+
+See :download:`UUI-SO_API_Specification_v0.1.docx`
+\ No newline at end of file