Dear all, I'm trying to perform a register => userid:password@proxy for incoming SIP calls from a provider and is not going too well. Pls refer to the attached debug log and hopefully someone can help me out. I believe that they're using Huawei equipment and the same userid/password pair is working fine with X-lite. What I noticed is that the nonce field on the reply is blank and I'm not sure if that's the problem and how I can fix it. I've included the register line with userid:password@IP/context in the sip.conf already Please help Reliably Transmitting: REGISTER sip:***.***.***.*** SIP/2.0 Via: SIP/2.0/UDP ***.***.84.142:5060;branch=z9hG4bK3dc4c27c From: <sip:21257343@***.***.***.226>;tag=as3e3d1bc2 To: <sip:21257343@***.***.***.***>;tag=1159d164 Call-ID: 71d5c3357db8742900215a6d586225b5@127.0.0.1 CSeq: 110 REGISTER User-Agent: X-Lite release 1103m Authorization: Digest username="21257343", realm="huawei.com", algorithm=MD5, uri="sip:***.*.***.***", nonce="", response="5b36c5c5997a2948cc0c8cb6c6d65711", opaque="" Expires: 120 Contact: <sip:21257343@***.***.**.142> Event: registration Content-Length: 0 (no NAT) to ***.*.***.***:5060 alansip3*CLI> Sip read: SIP/2.0 401 Unauthorized From: <sip:21257343@***.*.***.226>;tag=as3e3d1bc2 To: <sip:21257343@***.*.***.226>;tag=1159d164 CSeq: 110 REGISTER Call-ID: 71d5c3357db8742900215a6d586225b5@127.0.0.1 Via: SIP/2.0/UDP ***.***.**.142:5060;branch=z9hG4bK3dc4c27c WWW-Authenticate: Digest realm="huawei.com", nonce="f343463ed7c33c6f233646513b01fa54",stale=false,algorithm=MD5 Content-Length: 0 9 headers, 0 lines Destroying call '71d5c3357db8742900215a6d586225b5@127.0.0.1' 11 headers, 0 lines Reliably Transmitting: REGISTER sip:***.*.***.*** SIP/2.0 Via: SIP/2.0/UDP ***.***.**.***:5060;branch=z9hG4bK0f47ded1 From: <sip:21257343@***.*.***.226>;tag=as752ce90a To: <sip:21257343@***.***.*.226> Call-ID: 71d5c3357db8742900215a6d586225b5@127.0.0.1 CSeq: 111 REGISTER User-Agent: X-Lite release 1103m Expires: 120 Contact: <sip:21257343@***.***.**.142> Event: registration Content-Length: 0 (no NAT) to ***.*.***.226:5060 alansip3*CLI> Sip read: SIP/2.0 401 Unauthorized From: <sip:21257343@***.*.***.226>;tag=as752ce90a To: <sip:21257343@***.*.***.226>;tag=2271772e CSeq: 111 REGISTER Call-ID: 71d5c3357db8742900215a6d586225b5@127.0.0.1 Via: SIP/2.0/UDP ***.***.**.142:5060;branch=z9hG4bK0f47ded1 WWW-Authenticate: Digest realm="huawei.com", nonce="4bd6abe2e1266bbae8075eb1f7f733e7",stale=false,algorithm=MD5 Content-Length: 0