flow:
  - start|DEFAULT_ONREPLY:
  - return|DEFAULT_ONREPLY:
sip_in:
  - 'SIP/2.0 180 Ringing'
  - 'From: <sip:4311002@spce.test>;tag=[\w-]+'
  - 'To: <sip:439333333@spce.test>;tag=[\w-]+'
  - 'CSeq: \d+ INVITE'
  - 'Contact: <sip:127.2.0.2:\d+;transport=UDP>'
  - 'Content-Length: 0'
  - 'P-NGCP-Src-Ip: 127.2.0.2'
  - 'P-NGCP-Src-Port: \d+'
  - 'P-NGCP-Src-Proto: udp'
  - 'P-NGCP-Src-Af: 4'
sip_out:
  - [
      'SIP/2.0 180 Ringing',
      'From: <sip:4311002@spce.test>;tag=[\w-]+',
      'To: <sip:439333333@spce.test>;tag=[\w-]+',
      'CSeq: \d+ INVITE',
      'Contact: <sip:127.2.0.2:\d+;transport=UDP>',
      'Content-Length: 0',
      'P-NGCP-Src-Ip: 127.2.0.2',
      'P-NGCP-Src-Port: \d+',
      'P-NGCP-Src-Proto: udp',
      'P-NGCP-Src-Af: 4',
    ]
