flow: - start|sl:filtered-ack: sip_in: - 'ACK sip:testuser1001@invite-locmap-forward.scenarios.test SIP/2.0' - 'From: ;tag=[\w-]+' - 'To: ;tag=[\w-]+' - 'CSeq: \d+ ACK' - 'Content-Length: 0' sip_out: []