[ Context 'ext-internal' created by 'pbx_config' ]
  '_500' =>         1. Goto(ext-menu|${EXTEN}|1)                  [pbx_config]

[ Context 'ext-menu' created by 'pbx_config' ]
  's' =>            1. Verbose (${EXTEN})                         [pbx_config]
                    2. Answer()                                   [pbx_config]
                    3. Playback(screen-callee-options)            [pbx_config]
                    4. Hangup()                                   [pbx_config]