To: <sip:1234567890@sip.domain.com:5060>;tag=as5eddd0d5
From: "9876543210"<sip:9876543210@sip.domain.com>;tag=9E7232463135364100175CA5
Call-ID: 020AC610278140000000035A@192.168.254.160
Max-Forwards: 70
User-Agent: NEC-i SL Series 04.00
Via: SIP/2.0/UDP 192.168.254.160:5060;branch=z9hG4bK9750E390C30B06FA
Content-Length: 0