The device can't get registered on freeswitch system with "481 Call Does Not Exist" connection log: recv 417 bytes from tcp/[172.16.20.20]:2055 at 16:38:37.513380: ------------------------------------------------------------------------ REGISTER sip:kustogroup.com SIP/2.0 Via: SIP/2.0/TCP 172.16.20.20:5060;rport;branch=z9hG4bK57a5b7e300000 From: <sip:1105@kustogroup.com>;tag=2f157a14 To: <sip:1105@kustogroup.com> Call-ID: 19361e92@172.16.20.20 CSeq: 1550332939 REGISTER Max-Forwards: 70 Contact: <sip:1105@172.16.20.20:5060;transport=tcp>;expires=900;events="message-summary" User-Agent: VOIP_Agent_001 Supported: path Content-Length: 0 ------------------------------------------------------------------------ send 623 bytes to tcp/[172.16.20.20]:2055 at 16:38:37.521226: ------------------------------------------------------------------------ SIP/2.0 401 Unauthorized Via: SIP/2.0/TCP 172.16.20.20:5060;rport=2055;branch=z9hG4bK57a5b7e300000 From: <sip:1105@kustogroup.com>;tag=2f157a14 To: <sip:1105@kustogroup.com>;tag=vy75Dp57NUm8m Call-ID: 19361e92@172.16.20.20 CSeq: 1550332939 REGISTER User-Agent: FreeSWITCH-mod_sofia/1.0.head-hacked-20120218T213714Z Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, UPDATE, INFO, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE Supported: timer, precondition, path, replaces WWW-Authenticate: Digest realm="kustogroup.com", nonce="20781b2c-185b-e111-952d-002590016844", algorithm=MD5, qop="auth" Content-Length: 0 ------------------------------------------------------------------------ recv 657 bytes from tcp/[172.16.20.20]:2055 at 16:38:37.538670: ------------------------------------------------------------------------ REGISTER sip:kustogroup.com SIP/2.0 Via: SIP/2.0/TCP 172.16.20.20:5060;rport;branch=z9hG4bKc91f046100001 From: <sip:1105@kustogroup.com>;tag=2f157a14 To: <sip:1105@kustogroup.com>;tag=vy75Dp57NUm8m Call-ID: 19361e92@172.16.20.20 CSeq: 1550332940 REGISTER Max-Forwards: 70 Contact: <sip:1105@172.16.20.20:5060;transport=tcp>;expires=900;events="message-summary" User-Agent: VOIP_Agent_001 Supported: path Authorization: Digest username="1105", realm="kustogroup.com", nonce="20781b2c-185b-e111-952d-002590016844", qop=auth, cnonce="53506aaa", nc=00000001, uri="sip:kustogroup.com", response="26cb514fc66213aef7873b857a5a42a6" Content-Length: 0 ------------------------------------------------------------------------ send 508 bytes to tcp/[172.16.20.20]:2055 at 16:38:37.540118: ------------------------------------------------------------------------ SIP/2.0 481 Call Does Not Exist Via: SIP/2.0/TCP 172.16.20.20:5060;rport=2055;branch=z9hG4bKc91f046100001 From: <sip:1105@kustogroup.com>;tag=2f157a14 To: <sip:1105@kustogroup.com>;tag=vy75Dp57NUm8m Call-ID: 19361e92@172.16.20.20 CSeq: 1550332940 REGISTER User-Agent: FreeSWITCH-mod_sofia/1.0.head-hacked-20120218T213714Z Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, UPDATE, INFO, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE Supported: timer, precondition, path, replaces Content-Length: 0 ------------------------------------------------------------------------ Please help, i cant understand the problem, another hardware device (DLink gateway) got registered without any problem. Connection logs are similar. ------------------------------------------------------------------------ recv 406 bytes from udp/[172.16.0.25]:5060 at 16:35:54.213419: ------------------------------------------------------------------------ REGISTER sip:kustogroup.com:5060 SIP/2.0 Via: SIP/2.0/UDP 172.16.0.25:5060;branch=z9hG4bKe8a46c80fd1882b6 From: <sip:1999@kustogroup.com>;tag=801a8ebf-898043 To: <sip:1999@kustogroup.com> Call-ID: BD21-112A-46684814FA6035979AAA-004@SipHost CSeq:4722 REGISTER Contact: <sip:1999@172.16.0.25:5060> Expires:600 Max-Forwards:70 User-Agent:dlink 12-38-43929367-0.9.5.1.1928-SA7O4 Content-Length: 0 ------------------------------------------------------------------------ send 635 bytes to udp/[172.16.0.25]:5060 at 16:35:54.220591: ------------------------------------------------------------------------ SIP/2.0 401 Unauthorized Via: SIP/2.0/UDP 172.16.0.25:5060;branch=z9hG4bKe8a46c80fd1882b6 From: <sip:1999@kustogroup.com>;tag=801a8ebf-898043 To: <sip:1999@kustogroup.com>;tag=p8FH3K0j75erF Call-ID: BD21-112A-46684814FA6035979AAA-004@SipHost CSeq:4722 REGISTER User-Agent: FreeSWITCH-mod_sofia/1.0.head-hacked-20120218T213714Z Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, UPDATE, INFO, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE Supported: timer, precondition, path, replaces WWW-Authenticate: Digest realm="kustogroup.com", nonce="dcc9c5ca-175b-e111-952d-002590016844", algorithm=MD5, qop="auth" Content-Length: 0 ------------------------------------------------------------------------ recv 639 bytes from udp/[172.16.0.25]:5060 at 16:35:54.311703: ------------------------------------------------------------------------ REGISTER sip:kustogroup.com:5060 SIP/2.0 Via: SIP/2.0/UDP 172.16.0.25:5060;branch=z9hG4bKe489a6a305c49f70 From: <sip:1999@kustogroup.com>;tag=801a8ebf-898043 To: <sip:1999@kustogroup.com> Call-ID: BD21-112A-46684814FA6035979AAA-004@SipHost CSeq:4723 REGISTER Contact: <sip:1999@172.16.0.25:5060> Expires:600 Max-Forwards:70 Authorization:Digest username="1999",realm="kustogroup.com",nonce="dcc9c5ca-175b-e111-952d-002590016844",uri="sip:kustogroup.com:5060",response="2ea94376953abc90a78efaa831e79af4",algorithm=MD5,cnonce="3870847b",qop=auth,nc=00001273 User-Agent:dlink 12-38-43929367-0.9.5.1.1928-SA7O4 Content-Length: 0 ------------------------------------------------------------------------ send 590 bytes to udp/[172.16.0.25]:5060 at 16:35:54.341527: ------------------------------------------------------------------------ SIP/2.0 200 OK Via: SIP/2.0/UDP 172.16.0.25:5060;branch=z9hG4bKe489a6a305c49f70 From: <sip:1999@kustogroup.com>;tag=801a8ebf-898043 To: <sip:1999@kustogroup.com>;tag=QH994eHp4e5aB Call-ID: BD21-112A-46684814FA6035979AAA-004@SipHost CSeq:4723 REGISTER Contact: <sip:1999@172.16.0.25:5060>;expires=600 Date: Sun, 19 Feb 2012 16:35:54 GMT User-Agent: FreeSWITCH-mod_sofia/1.0.head-hacked-20120218T213714Z Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, UPDATE, INFO, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE Supported: timer, precondition, path, replaces Content-Length: 0