.. _extension-main: extension-main

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Extension
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An extension is an internal SIP endpoint (e.g., ``1001``) that registers agents or devices to the VoIPBIN platform for making and receiving calls.

**API Reference:** `Extension endpoints <https://api.voipbin.net/redoc/#tag/Extension>`_

.. include:: extension_overview.rst
.. include:: extension_struct_extension.rst
.. include:: extension_tutorial.rst