Frame 42: 365 bytes on wire (2920 bits), 365 bytes captured (2920 bits)
Ethernet II, Src: 96:4b:13:0a:75:a7 (96:4b:13:0a:75:a7), Dst: Cisco_c9:01:c2 (00:26:51:c9:01:c2)
Internet Protocol Version 4, Src: xx.xx.xx.xx, Dst: yy.yy.yy.yy
User Datagram Protocol, Src Port: 5060, Dst Port: 40755
    Source Port: 5060
    Destination Port: 40755
    Length: 331
    Checksum: 0x8d95 [unverified]
    [Checksum Status: Unverified]
    [Stream index: 3]
    [Timestamps]
        [Time since first frame: 0.365796000 seconds]
        [Time since previous frame: 0.003036000 seconds]
    UDP payload (323 bytes)
Session Initiation Protocol (489)
    Status-Line: SIP/2.0 489 Bad Event
        Status-Code: 489
        [Resent Packet: False]
        [Request Frame: 41]
        [Response Time (ms): 3]
    Message Header
        Via: SIP/2.0/UDP yy.yy.yy.yy:40755;rport=40755;received=yy.yy.yy.yy;branch=z9hG4bK.b~vopkMib
            Transport: UDP
            Sent-by Address: yy.yy.yy.yy
            Sent-by port: 40755
            RPort: 40755
            Received: yy.yy.yy.yy
            Branch: z9hG4bK.b~vopkMib
        Call-ID: AEJHLNZ8Jb
        [Generated Call-ID: AEJHLNZ8Jb]
        From: <sip:[email protected]>;tag=qjdN1otZ2
            SIP from address: sip:[email protected]
                SIP from address User Part: Aivp305nAy2j
                SIP from address Host Part: xx.xx.xx.xx
            SIP from tag: qjdN1otZ2
        To: <sip:[email protected]>;tag=z9hG4bK.b~vopkMib
            SIP to address: sip:[email protected]
                SIP to address User Part: Aivp305nAy2j
                SIP to address Host Part: xx.xx.xx.xx
            SIP to tag: z9hG4bK.b~vopkMib
        CSeq: 21 PUBLISH
            Sequence Number: 21
            Method: PUBLISH
        Server: Asterisk PBX 20.8.1
        Content-Length:  0