[default] 
include => outgoing

[incoming] 
exten => <BV#>,5,Dial(SIP/7000,60,r)

[outgoing] 
exten => _1NXXNXXXXXX,1,Dial(SIP/${EXTEN}@sip.broadvoice.com,60)
exten => _NXXNXXXXXX,1,Dial(SIP/${EXTEN}@sip.broadvoice.com,60)
exten => _NXXXXXX,1,Dial(SIP/${EXTEN}@sip.broadvoice.com,60)