The dialing device is in the context=toll
                                                                                                                              
[toll]
exten => _9NXXXXXX,1,Dial(Zap/g1/${EXTEN:1})
include => local
                                                                                                                              
                                                                                                                              
[local]
exten => _9555XXXX,1,Dial(IAX2/fred@happyhost/${EXTEN:1})
                                                                                                                              
                                                                                                                              
When I dial 9-555-1212 it gets sent out Zap/g1 instead of IAX2/happyhost