Sip read: REFER sip:8@172.22.22.1 SIP/2.0 Via: SIP/2.0/UDP 172.22.22.20;branch=z9hG4bKacnDsJAvg From: ;tag=1c4442 To: ;tag=as63b10881 Call-ID: 55281663116631UnJL-2218--8@172.22.22.20 CSeq: 30217370 REFER Contact: 2218 Max-Forwards: 70 Refer-To: sip:*8@172.22.22.1?Replaces=55513264932649ejND-2218--*8%40172.22.22.20%3Bto-tag%3Das6a21 c4c8%3Bfrom-tag%3D1c30051 Referred-By: sip:2218@172.22.22.20 User-Agent: Audiocodes-Sip-Gateway-MP-108 FXS/v.4.20.354.564 Content-Length: 0 SIP/2.0 202 Accepted Via: SIP/2.0/UDP 172.22.22.20;branch=z9hG4bKacnDsJAvg From: ;tag=1c4442 To: ;tag=as63b10881 Call-ID: 55281663116631UnJL-2218--8@172.22.22.20 CSeq: 30217370 REFER User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER Contact: Content-Length: 0 to 172.22.22.20:5060 NOTIFY sip:2218@172.22.22.20 SIP/2.0 Via: SIP/2.0/UDP 172.22.22.1:5060;branch=z9hG4bK1051643d;rport From: ;tag=as63b10881 To: ;tag=1c4442 Contact: Call-ID: 55281663116631UnJL-2218--8@172.22.22.20 CSeq: 102 NOTIFY User-Agent: Asterisk PBX Event: refer;id=30217370 Subscription-state: terminated;reason=noresource Content-Type: message/sipfrag;version=2.0 Content-Length: 14 SIP/2.0 200 OK (no NAT) to 172.22.22.20:5060 BYE sip:2218@172.22.22.20 SIP/2.0 Via: SIP/2.0/UDP 172.22.22.1:5060;branch=z9hG4bK2a571002;rport From: ;tag=as63b10881 To: ;tag=1c4442 Contact: Call-ID: 55281663116631UnJL-2218--8@172.22.22.20 CSeq: 103 BYE User-Agent: Asterisk PBX Content-Length: 0 (no NAT) to 172.22.22.20:5060 BYE sip:2218@172.22.22.20 SIP/2.0 Via: SIP/2.0/UDP 172.22.22.1:5060;branch=z9hG4bK5c95d675;rport From: ;tag=as6a21c4c8 To: ;tag=1c30051 Contact: Call-ID: 55513264932649ejND-2218--*8@172.22.22.20 CSeq: 102 BYE User-Agent: Asterisk PBX Content-Length: 0 (no NAT) to 172.22.22.20:5060