Could you help me to decode the error following this request to register?
Thank you.
[7] 2009/06/18 23:48:11: SIP Tx udp:83.211.227.21:5060:
REGISTER sip:voip.eutelia.it SIP/2.0
Via: SIP/2.0/UDP 192.168.xx.yy:5060;branch=z9hG4bK-8be9d4687e29492fe66a65a56eaba639;rport
From: "111222333" <sip:111222333@voip.eutelia.it>;tag=53223
To: "111222333" <sip:111222333@voip.eutelia.it>
Call-ID: bo8pfk8d@pbx
CSeq: 47528 REGISTER
Max-Forwards: 70
Contact: <sip:111222333@192.168.xx.yy:5060;transport=udp;line=d3d94468>;+sip.instance="<urn:uuid:290191a7-c420-4279-b874-d847a684834c>"
User-Agent: pbxnsip-PBX/3.3.0.3165
Authorization: Digest realm="voip.eutelia.it",nonce="4a392a5aea78754b2fea45340545c05306936a85",response="19b7a13e513d4ef2b41c81db67e62c97",username="111222333@83.211.227.21",uri="sip:voip.eutelia.it",qop=auth,nc=00001728,cnonce="49a6eb92",algorithm=MD5
Expires: 3600
Content-Length: 0
[7] 2009/06/18 23:48:11: SIP Rx udp:83.211.227.21:5060:
SIP/2.0 400 Bad Request
Via: SIP/2.0/UDP 192.168.xx.yy:5060;branch=z9hG4bK-8be9d4687e29492fe66a65a56eaba639;rport=5060;received=88.32.xx.yy
From: "111222333" <sip:111222333@voip.eutelia.it>;tag=53223
To: "111222333" <sip:111222333@voip.eutelia.it>;tag=d7cbdeb4f107ce82ed834cadd3d6dbb2.fcc2
Call-ID: bo8pfk8d@pbx
CSeq: 47528 REGISTER
Server: SPS EUT GW 01 (0.9.6 (i386/linux))
Content-Length: 0
Warning: 392 83.211.227.21:5060 "Noisy feedback tells: pid=3533 req_src_ip=88.32.xx.yy req_src_port=5060 in_uri=sip:voip.eutelia.it out_uri=sip:voip.eutelia.it via_cnt==1"