A STUN (Session Traversal of User Datagram Protocol [UDP] Through Network Address Translators [NATs]) server allows NAT clients (i.e. IP phones behind a firewall) to set up phone calls to a VoIP provider hosted outside of the local network.

Using a STUN server may be necessary if you experience router issues where you are unable to disable the SIP ALG setting - to allow VoIP traffic through. 

To enter a STUN server address when setting up a VoIP phone line please enter the following:


The above will need to be entered into the Gigaset Base/Desk phone web interface settings. 

For the Gigaset Base Station please click here

For a Gigaset Desk phone please click here 

If you have any questions please contact our Support Helpdesk.