SIP/2.0100TryingVia:SIP/2.0/UDP192.168.1.153:6060;branch=z9hG4bK1057312524;received=192.168.1.153From:"873";tag=399697897To:"873"Call-ID:855535122@192.168.1.153CSeq:3866REGISTERUser-Agent:MG3000-X100Allow:INVITE,ACK,CANCEL,OPTIONS,B