[Freeswitch-users] block unknown callers

[Rodney]

I am using ipkall for one of my gateways and it does not pass flex ani. so they are allowed to block themselves . what can i add before or after the answer condition so it transfers the call to a toll free trap that forwards unblocked ball back to the dialplan or either transfers them to a local message that tells them to call back unblocked then hangs up.
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