I need to use agi to handle some issue , after finishing agi i want to hang up the channel , if i call from an extension there is no problem but i want to be the same for PSTN (outside) caller , if someone call asterisk show the hang up channel but the caller is not disconnected and if meanwhile someone inside try to call from an extension the outide caller can listen to DTMF and everything . . . . I would be really grateful if you share your close experience .