SIP/2.0 100 Trying Via: SIP/2.0/UDP 192.168.1.153:6060;branch=z9hG4bK1057312524;received=192.168.1.153 From: "873" ;tag=399697897 To: "873" Call-ID: 855535122@192.168.1.153 CSeq: 3866 REGISTER User-Agent: MG3000-X100 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO Supported: replaces Content-Length: 0 1.151:6060", response="a4d0abab3fdd361ee346a93ea5fef18c", algorithm=MD5 Max-Forwards: 30 User-Agent: ET198 Expires: 60 Content-Length: 0