Hotspot Limiting Amount of Traffic

Hi,

I have a question about hotspot limit-bytes-in limit-bytes-out property.
http://www.mikrotik.com/docs/ros/2.9/guide/aaa_hotspot
give some details but i am confused how to implement in radius.

This document says:
"The byte limits are total limits for each user (not for each session as at /ip hotspot active). So, if a user has already downloaded something, then session limit will show the total limit - (minus) already downloaded. For example, if download limit for a user is 100MB and the user has already downloaded 30MB, then session download limit after login at /ip hotspot active will be 100MB - 30MB = 70MB. "

So as i understand if i set limit-bytes-X some values and hotspot user
download/upload some data mikrotik handle it as described below.

However i want to set this values from Radius.
Recv-Limit and Xmit-Limit seem to be used for this case..
But i haven’t found any information how MT handle this values..

If i set this attributes values X byte then MT handle it as described before?
Or this limits that come from radius only for per session?

Thanks for your response..
devrim