[ Context 'incoming' created by 'pbx_config' ]
  'f' =>            1. Goto(fax|1)                                [pbx_config]
  'fax' =>          1. Set(FAXFILE=/var/spool/asterisk/fax/${UNIQUEID}.tif) [pbx_config]
                    2. rxfax(${FAXFILE})                          [pbx_config]
                    3. Hangup()                                   [pbx_config]
  'i' =>            1. Goto(s|3)                                  [pbx_config]
  's' =>            1. Answer()                                   [pbx_config]
                    2. Background(hawaii)                         [pbx_config]
                    3. Set(TIMEOUT(response)=5)                   [pbx_config]
                    4. Set(TIMEOUT(digit)=5)                      [pbx_config]
  't' =>            1. Dial(Zap/7|30|t)                           [pbx_config]
                    2. Hangup()                                   [pbx_config]