1 Problem Description
Skype For Business connect U1981 failed
2 Problem Analysis
Running command "show sip parameter" to find the TCPSrvPort is 5060.


3 Problem Root Cause
TCP port 5060 was closed on U1981
4 Solution
Upload patch R&D team provided to U1981 and then running following command:
config modify sip parameter tcpsrvport 5080
config modify sip parameter tcpsrvport 5060
