Something

[custom-block-all-v2-dial]
include => outbound-allroutes
include => custom-block-all-vm
exten => s,1,Answer
exten => s,2,Wait(2)
exten => s,3,Playtones(dial)
exten => s,4,Set(TIMEOUT(digit)=10)
exten => s,5,AbsoluteTimeout(1200)
exten => s,6,Goto(s,1)
exten => ##,1,Goto(s,1)
exten => t,1,Hangup
;exten => i,1,Goto(s,1)