No.     Time        Source                Destination           Protocol Info
    880 14.963367   192.168.1.15          192.168.1.11          SIP      Status: 100 Trying

Frame 880 (344 bytes on wire, 344 bytes captured)
Linux cooked capture
Internet Protocol, Src: 192.168.1.15 (192.168.1.15), Dst: 192.168.1.11 (192.168.1.11)
User Datagram Protocol, Src Port: sip (5060), Dst Port: sip (5060)
Session Initiation Protocol
    Status-Line: SIP/2.0 100 Trying
    Message Header
        Via: SIP/2.0/UDP 192.168.1.11;branch=z9hG4bK6008414cefae770f
        From: <sip:+41215509999@192.168.1.15>;tag=82109cffc4d06068
        To: <sip:+41215501111@192.168.1.15>
        Call-ID: d0f0a4e0cfa0590b@192.168.1.11
        CSeq: 50933 INVITE
        User-Agent: Grandstream BT110 1.0.8.33
        Content-Length: 0