Does the router show the right time? You can use "clock timezone TimeZone HoursOffset" in the case the time in the router is not right. is the router syncronized with an NTP server? What is the output of the "show ntp status"? Does it show that the router is synchronized with the ntp server? Also make sure you have the correct firmware load for the phones on the router.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.