Hi, I have MP-124 device with SIP. So I have problem with registration , I get error in Asterisk: SIP/2.0 481 Call/Transaction Does Not Exist. I have created in asterisk each fxs port as a user in sip.conf. So in calls there is no problem. I can call everywhere, but in logs I see this messages, so I want to avoid it. Maybe somebody has MP-124 and has no problem and can give me some advice how to fix this problem. Thanks This my trace: # U 192.168.1.1:5060 -> 192.168.1.2:5060 NOTIFY sip:7419@192.168.1.2 SIP/2.0. Via: SIP/2.0/UDP 192.168.1.1:5060;branch=z9hG4bK26434b38. From: "Unknown" <sip:Unknown@192.168.1.1>;tag=as56d969af. To: <sip:7419@192.168.1.2>. Contact: <sip:Unknown@192.168.1.1>. Call-ID: 79e1927a4b331c8443b7b3c5445d742a@192.168.1.1. CSeq: 102 NOTIFY. User-Agent: Asterisk PBX. Max-Forwards: 70. Event: message-summary. Content-Type: application/simple-message-summary. Content-Length: 92. . Messages-Waiting: no. Message-Account: sip:asterisk@192.168.1.1. Voice-Message: 0/0 (0/0). # U 192.168.1.2:5060 -> 192.168.1.1:5060 SIP/2.0 481 Call/Transaction Does Not Exist. Via: SIP/2.0/UDP 192.168.1.1:5060;branch=z9hG4bK26434b38. From: "Unknown" <sip:Unknown@192.168.1.1>;tag=as56d969af. To: <sip:7419@192.168.1.2>;tag=1c1736631378. Call-ID: 79e1927a4b331c8443b7b3c5445d742a@192.168.1.1. CSeq: 102 NOTIFY. Contact: <sip:192.168.1.2>. Supported: em,timer,replaces,path. Allow: REGISTER,OPTIONS,INVITE,ACK,CANCEL,BYE,NOTIFY,PRACK,REFER,INFO,SUBSCRIBE,UPDATE. Content-Length: 0. . Asterisk is 192.168.1.1 and MP-124 is 192.168.1.2. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20060808/f7163ee9/attachment.htm