session attribute Freeradius freeradius-utils-2.1.12

Greetings, can someone assist me to know how to identify that if my freeradiud is including session time-out attribute in reply from "radius -X". if i execute "radius -X" i get the following related to session time-out, 1.) INTERVAL (%{%{Acct-Session-Time}:-0} 2.) %{Acct-Session-Time}', does this mean it includes the attribute. if i am sure i can focus in NAS side because session time-out is not working with me. i am bit confuse where is the problem. thanks for attending it. freeradius-2.1.12-4.el6_3.x86_64 freeradius-utils-2.1.12-4.el6_3.x86_64 Regards