I don't get the disconnects and I have my details in the router.
I think its might be because of the 24 hour disconnect that @lantic/vox have on their products to calculate usage more effectively.....
It might be that when they disconnect happens your router does not recover.... It has been discussed by 2 @lantic reps too. Not sure where that topic went to will see if I can find it and link you.
http://mybroadband.co.za/vb/showthread.php/591665-Vox-lantic
Specifically the first quote in this post by cvanwie
http://mybroadband.co.za/vb/showthread.php/591665-Vox-lantic?p=11983723&viewfull=1#post11983723
Could be your router that does not reconnect after the session is ended after 24 hours. ISP's like Telkom,IS and Afrihost does not kill the session every 24 hours. I think thats why you are having this problem.