UTStarcom IAN-02EX - Manual (Page 10)

Telephone’s Analogue Adapter – UTStarcom iAN-02EX (V1.8.2.17a) – Operating Manual pag.10
2. click on “ SIP ” menu, then on “Send#” item choose the option Disable and click
OK
3. click on “ STUN ” menu, then verify the values and click OK
The “NAT Address” item will be automatically updated with the public IP address
after the authentication of the ADSL access.