[Freeswitch-users] early media + sip trunk

Hello friends, I would like to know how is the better way to block outbound calls with early media and sip trunk, I have a system for callcenter and I have a big problem with calls in voicemail entering to agents , I tried to use monitor_early_media_fail with ignore_early_media but I didn't have a sucessfull, it is possible to use this function to block it? How can i do it? My wish is to stop the call when i knew that is a voicemail call. -- Atenciosamente, Tiago Galvão Gomes de Souza.