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+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. SPDX-License-Identifier: CC-BY-4.0
+.. Copyright (C) 2020 Nordix
+
+.. |nbsp| unicode:: 0xA0
+ :trim:
+
+.. |nbh| unicode:: 0x2011
+ :trim:
+
+
+A1 Simulator EXT SRV
+=====================
+
+The A1 Simulator terminates the A1 interface and provides a way to test Non-RT RIC services without the need to deploy Near |nbh| RT |nbsp| RICs.
+
+Apart from providing the A1 API, the simulator also provides an administrative API to manage policy types and manipulate
+the simulator, see ":ref:`ext-srv-api`".
+
+The A1 Simulator supports running multiple simulations using different versions of the A1 Application protocol, and supports realistic stateful simulation of A1 Enrichment Information and A1 Policy behaviours.
+
+For information on how to run the simulator, see the *README.md* file in the repository.