--- counter.conf.orig	2008-07-30 16:41:30.000000000 -0400
+++ counter.conf	2008-07-30 16:42:13.000000000 -0400
@@ -117,3 +117,11 @@ sqlcounter noresetcounter {
 } 
 
 
+sqlcounter accessperiod {
+	counter-name = Max-Access-Period-Time
+		check-name = Access-Period
+                sqlmod-inst = sql
+                key = User-Name
+                reset = never
+	query = "SELECT UNIX_TIMESTAMP() - UNIX_TIMESTAMP(AcctStartTime) FROM radacct WHERE UserName = '%{%k}' ORDER BY AcctStartTime LIMIT 1"
+}