I configured my DP750 to register using TCP/TLS. Registration and calling works fine, but every day, at 4A.M. I start to see these kind of errors every 20 seconds in the syslog:
Nov 07 04:00:33 xxx.xxx.xxx.xxx logger: DP750 [xx:xx:xx:xx:xx:xx] [18.104.22.168]cb_transport_error:SIPStack.cc(6282)->SIPStack(0): Transport error (-1) for transaction 3640
And at around 6A.M. my registration fails and I cannot call anymore. After setting up the SIP account again or after rebooting, everything is back to normal.
I need the latest beta version because I need the fixes for the distinctive ringtone.
What is the problem here?