[Freeswitch-users] how get billserc in dialplan?

[Jorge Cadena]

Hi

how get billsec in dialplan.
i am try a condition after sched_transfer_time.
<condition field="${cond( ${answered_time} >= ${duration} ? YES : NO )}" expression="^YES$">

i need check two time in seconds, without hangup the call
example
<condition field="${cond( 60 >= 30 ? YES : NO )}" expression="^YES$">
Thank
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