I need queue sequential strategy, in which first ring should always be at a prioritized nominated extension. And after a certain time, if not attended then should transferred to 2nd priority extension.
To do literally that, call Dial for the priority extension, before calling Queue. Otherwise look at the linear strategy.
You can probably use Queue member penalty for your purpose.
See Queue Member Priority section in asteriskdocs.org/en/3rd_Edition/ … 88932.html