REGISTER sip:company.com SIP/2.0
To: sip:j.user@COMPANY.COM;maddr=135.180.130.133;tag=foo
From: sip:j.user@COMPANY.COM;x-param-0=0;x-param-1=1;x-param-2=2;x-param-3=3;x-param-4=4;x-param-5=5;x-param-6=6;x-param-7=7;x-param-8=8
Call-ID: 0ha0isndaksdj@10.0.2.2  
Contact: *
CSeq: 9 REGISTER
Via: SIP/2.0/UDP 135.180.130.133
Content-Length: 0