flow:
  - start|DEFAULT_ONREPLY:
  - start|REPLY_ROUTE_NAT:
  - start|ROUTE_ENTRY:
  - return|ROUTE_ENTRY:
  - start|ROUTE_PREPARE_UA:
  - return|ROUTE_PREPARE_UA:
  - start|REPLY_ROUTE_NAT_CONTINUE:
  - start|ROUTE_EXIT:
  - start|ROUTE_RUNTIME:
  - return|ROUTE_RUNTIME:
  - exit|ROUTE_EXIT:
sip_in:
  - '^SIP/2.0 180 Ringing'
  - 'CSeq: \d+ INVITE'
  - 'Contact: <sip:127.0.0.1:508[08];transport=udp>'
sip_out:
  - [
      '^SIP/2.0 180 Ringing',
      'CSeq: \d+ INVITE',
      'Contact: <sip:127.0.0.1:508[08];transport=udp>',
    ]