How can I add two leading zeros when I plaec a call

Hello, my provider requires two leading zeros when I place a call. I want to know whether this can be inserted in the dial plan.

They required this syntax to dial out.

exten => _00.,1,Dial(IAX2/password@myprovider/${EXTEN},10)

I have tried the following as sugested by a friend but it will not work, will sound busy.

exten => _NXXNXXXXXX,1,Dial(IAX/provider/00${EXTEN})

Is there anyway around this?



exten => _.,1,Dial(IAX2/password@myprovider/00${EXTEN},10)