I have purchased a Yeastar TA800 FXS gateway. It came with firmware version 220.127.116.11 installed on it. The latest firmware on the Yeastar website for the TA800 is version 18.104.22.168, which is dated 2017-05-05.
Which firmware version is the latest or most recent? If the 22.214.171.124 is the most recent, then I need a primer on the Yeastar firmware version numbering schema.