Hi, From last week I was trying to register Cisco phone with FreeSwitch using mod_skinny.I am using solarwinds as TFTP server . But registration is not successful. Phone cycles through the process of TFTP download and sending register message along with some more SKINNY messages to FreeSwitch. Also on FreeSwitch Console I get message as "UCM-Closed-TCP" Attached are the wireshark capture for phone and FreeSwitch.log file From wireshark capture we can clearly see that phone sends "RegisterMessage" SKINNY message in a cycle. This is the consistent flow. Also attaching SEP[MAC].cnf.xml file which I am using. Ph IP Addr : 192.1681.1.205 FreeSwitchIP Addr : 192.168.1.116 Please have a look at this issue and let me know if I am missing anything here Thanks, Manjiri