[Freeswitch-users] Limiting call length

Hey all Looking for a way to limit all calls to a maximum of 10 minutes, when originating a call using the event socket. I’ve tried using sched_hangup like this: originate {origination_caller_id_number=01234567890,execute_on_answer=sched_hangup +600 alloted_timeout}sofia/. . . .  But no dice… R