Unicorn 3101 User Manual
Copyright © 2008
Hanlong Technology Co., Ltd Page 20 of 29
configuration file saved at local pc
FXS Port
FXS PORT
Setting options
Meaning
Account Active:
Set to the
YES
, the account can be available
SIP Server
SIP Server’s URI or IP address
Outbound Proxy
SIP Outbound Proxy Server’s URI or IP address
NAT Traversal
This parameter defines whether the Unicorn 3101 NAT
traversal mechanism will be activated or not. If activated
(by choosing
Yes
) and a STUN server is also specified,
then the Unicorn 3101 will behave according to the
STUN client specification. Under this mode, the
embedded STUN client inside the Unicorn 3101 will
attempt to detect if and what type of firewall/NAT it is
sitting behind through communication with the specified
STUN server. If the detected NAT is a Full Cone,
Restricted Cone, or a Port-Restricted Cone, the Unicorn
3101will attempt to use its mapped public IP address
and port in all its SIP and SDP messages. If the NAT
Traversal field is set to “Yes” with no specified STUN
server, the Unicorn 3101will periodically (every 20
seconds or so) send a blank UDP packet (with no
