I have this issue since 2014 and I posted again trying to find some support to solve this issue.
I have Chines VICZONE since 2009 model T300c
which is work on different GPS Track software till today, I try it here many but not work,
I set the device IP on 220.127.116.11:20183 for http://id.wialon.net/
which is not show on the list, !!!!
as I can't see the device here how to debug the issue, the device and internet are working on other GPS trace service provider ?