Update phones.rst

source/phones/phones.rst

@@ -27,7 +27,7 @@ on the right.
         :scale: 85%
 
 |
-
+| *Options in* **bold** *are mandatory.*
 | **Name:** Enter a name for the IVR menu
 | **Extension:** Enter the extension number (This must a new extension that isn't allready created)
 | **Greet Long:** The long greeting when entering the menu.