Peer Details
Trunk Name: Gizmo5
disallow=all
allow=ulaw&alaw&ilbc
canreinvite=no
context=from-trunk
dtmfmode=rfc2833
fromdomain=proxy01.sipphone.com
fromuser=1747xxxxxxx <-- Your Gizmo5 number
host=proxy01.sipphone.com
insecure=very
secret=<password>
type=peer
username=1747xxxxxxx <-- Your Gizmo5 number

User Details
(not used)

Register String:
1747xxxxxxx:<password>@proxy01.sipphone.com

Notes: