SIP/2.0 604 Invalid Calling Party Number
Via: SIP/2.0/UDP 75.101.133.137:5080;branch=z9hG4bKm4028av6cyD0F;received=75.101.133.137;rport=5080
From: "" <sip:a6031sTVQLeOhyIV@sip.gafachi.com;transport=udp>;tag=j8BBv5jaycaFF
To: <sip:15025482003@sip.gafachi.com>;tag=gss0c342e9c3ad2398e2f610f7ce613a089
Call-ID: b161c7c6-b33c-122b-33b2-123138006c07
CSeq: 100525131 INVITE
Server: Gafachi UAS v110.08
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE
Contact: <sip:15025482003@64.192.112.13>
Content-Length: 0