Update fax_server.rst

source/applications/fax_server.rst

@@ -74,6 +74,10 @@ FAX Default Settings
 
 * Goto Menu -> Advanced -> Default Settings then category Fax
 * Variables are used as defaults for the dialplan for sending and receiving faxes
+
+.. image:: ../_static/images/fax_variables.jpg
+        :scale: 85%
+
 * *fax_enable_t38_request=false* (Can be true or false)
 * *ignore_early_media=true* (Can be true or false)
 * Some carriers it's better for fax_enable_t38_request=true and for some its better for it to be false.