If STUN is used, then the settings should be as can be seen in the screenshot below.
If STUN is not used, then after ‘STUN enabled’ the option ‘No’ should be ticked.
If changes have been made, these can be effectuated by clicking ‘Set’.
This is also the location where a connection can be deleted.
Configuration manual for Gigaset DECT phones on the gnTel platform - version final 1.0 - May 2017 10