in extensions.conf:
[enumcheck]
exten => _41NXXNXXXXXX,1,EnumLookup(${EXTEN:1})
exten => _41NXXNXXXXXX,2,Dial(${ENUM})
exten => _41NXXNXXXXXX,3,Hangup
exten => _41NXXNXXXXXX,102,Hangup

[incoming] 
ignorepat => 9
exten => s,1,Wait,3                     ; Waiting a little longer for CID
exten => s,2,Answer                     ; Answer the line
exten => s,3,DigitTimeout,5             ; Set Digit Timeout to 5 seconds
exten => s,4,ResponseTimeout,10         ; Set Response Timeout to 10 seconds
.
.
. It goes to my IVR
.



in iax.conf:
[enum]
type=user
context=incoming


enum.conf:
[general]
search => enum.fierymoon.com
search => e164.arpa

h323driver => H323