You can see the Register Status in the Status item. If the item shows “Registered”, then your VoIP Phone is
registered to the ISP, you can make a phone call directly.
If you have more than one SIP account, you can following the steps to register to the other ISP.
When you finished the setting, please click the Apply button.
□User Name: you need to input the Register Name get from your ISP.
□Password: you need to input the Register Password get from your ISP.
STUN Traversal
STUN {Simple Traversal of UDP through NATs (Network Address Translation)} is a protocol for
assisting devices behind a NAT firewall or router with their packet routing.
STUN enables a device to find out its public IP address and the type of NAT service its sitting
behind.
When you enable the STUN function, you must input the STUN server address.
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