Left off my general. Here it is.

[general]
useragent=SIP
externip=xxx.xxx.xxx.xxx
localnet=192.168.0.0/255.255.255.0
context = ********
bindport=5060
callerid=No CallID
disallow=all
allow=gsm
allow=ulaw
allow=alaw
allow=iLBC
maxexpirey=180
defaultexpirey=160
tos=reliability
nat=no ; Rely on the fixup protocols to handle the sip xlateion
qualify=yes
dtmfmode=rfc2833
canreinvite=no
realm=asterisk