Blind transfer and Voice Mail

Hello, I am tryng to setup Asterisk with my old legacy pbx.

I have acomplished some tasks but I cant figure this out
To reduce the use of channels on asterisk if a outside caller wants to talk to a user I use the flash() command to transfer the call, something like this:

exten=s,1,Answer
exten=s,2,Flash()
exten=s,3,Wait(1)
exten=s,4,SendDTMF(${EXTEN})
exten=s,5,Hangup()

Is there a way to send that call to a voicemail if that extension does not answer? Beeing the transfer a blind one I dont know if asterisk looses control over it , is there a way to acomplish this.

Thanks in advance
Alejandro Jourdan

Try this.
the-asterisk-book.com/unstab … piele.html

Thank you very much, I will get on to it!