Yealink Forums

Hi, I've a T26P and i can make call without sip registration (ex: from phone to fxo gateway, without pbx). With T23G i get error "Unknown URI Scheme", there is setting for avoid this?
Thanks.

Do you mean that you dail the IP of other phones directly?

If yes, please go to web interface->features->generally information->allow IP call, then enable this feature.
If not, please let me know again.