Got the below error in the softphone log :
DEBUG [2017-04-11 10:09:22,061] [New I/O worker #2] - Complete message handling: 54
DEBUG [2017-04-11 10:09:22,061] [com.genesyslab.PCT.invoker.default] - Dn is unregistered ...
DEBUG [2017-04-11 10:09:22,061] [com.genesyslab.PCT.invoker.default] - Channel state transition[psdkendpoint - tcp://91.15:3020]: Opened->Closing
DEBUG [2017-04-11 10:09:22,061] [com.genesyslab.PCT.invoker.default] - Closing channel 'psdkendpoint - tcp://.91.15:3020
DEBUG [2017-04-11 10:09:22,072] [New I/O worker #1] - New message #54
DEBUG [2017-04-11 10:09:22,072] [New I/O worker #1] - Proxy got message EventUnregistered. Processing with state .StateBackup@113b816 proxy: proxy1
DEBUG [2017-04-11 10:09:22,073] [New I/O worker #2] - New message #52
DEBUG [2017-04-11 10:09:22,074] [New I/O worker #2] - Proxy got message EventError. Processing with state .StatePrimary@eb6ada proxy: proxy2
DEBUG [2017-04-11 10:09:22,077] [com.genesyslab.PCT.invoker.default] - [PSDK.Timer] Scheduled closeTimeoutTask [91.15:3020<10.8.:61926] ; delay:30000; queue:1
INFO [2017-04-11 10:09:22,077] [com.genesyslab.PCT.invoker.default] - ConnState transition. 'Opened' -> 'Closing' for 91.15:3020<10.97:61926[Closing]/0 - HA
DEBUG [2017-04-11 10:09:22,077] [com.genesyslab.PCT.invoker.default] - Closing connection
DEBUG [2017-04-11 10:09:22,077] [com.genesyslab.PCT.invoker.default] - Closing HA connection [Windows 7/6.1/x86/1.8.0_121/25.11/windows-1252]