Something

;******************************
;begining of peer section
;*****************************

;broadvoice peer
[sip.broadvoice.com]
type=peer
user=phone
host=sip.broadvoice.com
fromdomain=sip.broadvoice.com
fromuser=<deleted>
secret=<deleted>
username=<deleted>
insecure=very
context=from-broadvoice
authname=<deleted>
dtmfmode=inband
dtmf=inband
;disable canreinvite if you are behind a NAT
canreinvite=yes