Hotspot nearing completion

[Daniel Baughman]

My install has come a long way and now I have nas AP's accepting querys, web site sign ups, credit cards accepted  via ssl, postgresql radius server's performing logging and documentation of usage statistics.  Now but one thing remains: How can I tell the NAS AP's to time out a user's connection after he has used his allotted minutes? I imagine it would be controlling the response query, after all, the radius server does give the NAS the timeout, right?