No.     Time        Source                Destination           Protocol Info
  33999 22.695702   198.22.67.70          192.168.1.5           IAX2     IAX, source call# 592, timestamp 0ms INVAL

Frame 33999 (60 bytes on wire, 60 bytes captured)
Ethernet II, Src: 00:0f:66:4b:30:fb, Dst: 00:a0:cc:39:96:6a
Internet Protocol, Src Addr: 198.22.67.70 (198.22.67.70), Dst Addr: 192.168.1.5 (192.168.1.5)
User Datagram Protocol, Src Port: 4569 (4569), Dst Port: 4569 (4569)
    Source port: 4569 (4569)
    Destination port: 4569 (4569)
    Length: 20
    Checksum: 0x88a9 (correct)
Inter-Asterisk eXchange v2
    Packet type: Full packet (1)
        .000 0010 0101 0000 = Source call: 592
        .000 0000 0000 0110 = Destination call: 6
        0... .... .... .... = Retransmission: False
        Timestamp: 0
        Outbound seq.no.: 0
        Inbound seq.no.: 0
        Type: IAX (6)
            IAX type: INVAL (10)