Provider Voip called SONETEL

Hello.
I wold like to configure a new number take from this provider " Sonetel"

Someone has ever configured a voip number by this provider?

I used this PEER detail :

type=friend
username=info
fromuser=info
fromdomain=XXXXXXXXX.it
host=sonetel.com
outboundproxy=sip.sonetel.com
disallow=all
allow=ulaw,alaw
qualify=yes
dtmf=rfc2833
nat=auto_force_rport
canreinvite=no
insecure=invite,port
context=sonetel
sendrpid=yes
secret=YYYYYY

and register string :

[email protected]:[email protected]

The number is registered in my freepbx but I can’t receive and call.

Do you have any idea about this?

Thanks

Change context from sonetel to from-pstn.